Updated on 2025/07/05

写真a

 
MURAMATSU Shogo
 
Organization
Academic Assembly Institute of Science and Technology JOUHOU DENSHI KOUGAKU KEIRETU Professor
Faculty of Engineering Department of Engineering Professor
Graduate School of Science and Technology Electrical and Information Engineering Professor
College of Creative Studies Creative Studies Course Professor
Title
Professor
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Degree

  • 博士(工学) ( 1998.11   東京都立大学 )

Research Interests

  • Embedded vision system

  • Filter banks

  • Sparse modeling

  • Multidimensional signal processing

  • Image restoration

  • Cyber-physical system

Research Areas

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Disaster prevention engineering

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering  / Signal processing

  • Informatics / Perceptual information processing  / Visual information processing

Research History (researchmap)

  • Niigata University   College of Creative Studies   Professor

    2021.4 - 2024.3

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  • Niigata University   Faculty of Engineering   Professor

    2019.4

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  • National Institute of Information and Communications Technology, Japan   Wireless Networks Research Centre   invitation specialist

    2018.6 - 2019.3

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  • Niigata University   Graduate School of Science and Technology Electrical and Information Engineering   Associate Professor

    2008.4 - 2019.3

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  • Niigata University   Faculty of Engineering Department of Electrical and Electronic Engineering   Associate Professor

    2004.4 - 2019.3

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  • University of Florence   Dept. of Information Engineering   Visiting Researcher

    2003.10 - 2004.9

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  • Niigata University   Faculty of Engineering Department of Electrical and Electronic Engineering   Associate Professor

    2001.2 - 2004.3

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  • Niigata University   Faculty of Engineering   Assistant

    1999.10 - 2001.1

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  • Tokyo Metropolitan University   Research Assistant

    1997.4 - 1999.9

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  • Tokyo Metropolitan University   Research Assistant

    1997.1 - 1997.3

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Research History

  • Niigata University   Creative Studies Course, College of Creative Studies   Professor

    2021.4

  • Niigata University   Faculty of Engineering Department of Engineering   Professor

    2019.4

  • Niigata University   Graduate School of Science and Technology Electrical and Information Engineering   Professor

    2019.4

  • Niigata University   Faculty of Engineering Department of Engineering   Associate Professor

    2017.4 - 2019.3

  • Niigata University   Graduate School of Science and Technology Electrical and Information Engineering   Associate Professor

    2010.4 - 2019.3

  • Niigata University   Faculty of Engineering Department of Electrical and Electronic Engineering   Associate Professor

    2004.4 - 2017.3

  • Niigata University   Abolition organization Communication Systems   Associate Professor (as old post name)

    2001.2 - 2004.3

  • Niigata University   Faculty of Engineering   Research Assistant

    1999.10 - 2001.1

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Education

  • Tokyo Metropolitan University   工学研究科   電気工学専攻

    1995.4 - 1996.12

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  • Tokyo Metropolitan University   工学研究科   電気工学専攻

    1993.4 - 1995.3

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  • Tokyo Metropolitan University   Faculty of Engineering   Department of Electrical Engineering

    1991.4 - 1993.3

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  • Tokyo National College of Technology   Department of Electronic Engineering   電子工学科

    1986.4 - 1991.3

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Professional Memberships

  • 計測自動制御学会

    2025.4

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  • APSIPA

    2007.8

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  • THE INSTITUTE OF IMAGE INFORMATION AND TELEVISION ENGINEERS

    2001.2

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  • IEEE

    1993.4

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  • THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS

    1993.1

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Committee Memberships

  • 日本学術振興会   学術システム研究センター専門研究員  

    2025.4 - 2028.3   

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    Committee type:Government

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  • 2024 International Conference of Visual Communications and Image Processing   Special Sessions Chair  

    2024.12   

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    Committee type:Academic society

    https://vcip2024.org/

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  • 映像情報メディア学会 メディア工学研究会 サマーセミナー2024   企画委員長  

    2024.8   

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    Committee type:Academic society

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  • ITC-CSCC2024   Special Session Chair  

    2024.7   

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    Committee type:Academic society

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  • 2023 International Conference of Visual Communications and Image Processing   Special Sessions Chair  

    2023.12   

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  • Media Engineering Research Committee of the Institute of Image Information and Television Engineers, Japan   Chair  

    2023.7   

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    Committee type:Academic society

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  • 電子情報通信学会 信越支部   会計  

    2023.5   

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    Committee type:Academic society

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  • The 37th IEICE Signal Processing Symposium   General Chair  

    2022.12   

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    Committee type:Academic society

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  • 13th APSIPA ASC   Special Session Co-chair  

    2021.12   

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  • ITC-CSCC 2021   General Co-chair  

    2021.6   

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    Committee type:Academic society

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  • IEICE Engineering Sciences Socety, Japan   Vice-Chairman (Head of Systems and Signal Processing Sub-Society)  

    2020.6 - 2021.5   

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    Committee type:Academic society

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  • APSIPA   Distinguished Lecturer  

    2020.1 - 2021.12   

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    Committee type:Academic society

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  • IEEE Transactions on Signal Processing   Associate Editor  

    2019.9 - 2023.9   

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    Committee type:Academic society

    https://api.accredible.com/v1/auth/invite?code=bd2e7cb512427ecf3c84&credential_id=482b142b-0963-40db-a3af-19aaaba02cd7&url=https%3A%2F%2Fwww.credential.net%2F482b142b-0963-40db-a3af-19aaaba02cd7&ident=503d164f-ce12-413e-bccb-3aedc77ee65a

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  • Signal Processing Research Specialist Committee, IEICE Engineering Sciences Society, Japan   Chair  

    2018.6 - 2019.5   

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    Committee type:Academic society

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  • APSIPA Image, Video, and Multimedia (IVM) Technical Committee   Member  

    2018.1 - 2024.12   

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    Committee type:Academic society

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  • Editorial Committee of IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   Area Editor (Image, Vision)  

    2017.6 - 2019.5   

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    Committee type:Academic society

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  • IEEE Signal Processing Society Tokyo Joint Chapter   Treasurer  

    2017.1 - 2018.12   

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    Committee type:Academic society

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  • IWAIT 2026   General Co-chair  

    2026.1   

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    Committee type:Academic society

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  • IEEE Shin-etsu Section   Nominations/Award Chair  

    2025.1   

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    Committee type:Academic society

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  • 令和5年度大学電気系教員協議会   委員長  

    2023.9   

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  • IWAIT 2022   Program Co-chair  

    2022.1   

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    Committee type:Academic society

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  • 電子情報通信学会   功績賞・業績賞委員会委員  

    2020.9 - 2021.2   

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    Committee type:Academic society

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  • 映像情報メディア学会メディア工学研究委員会   副委員長  

    2020.5 - 2023.6   

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  • 電子情報通信学会 基礎・境界ソサイエティ システムと信号処理サブソサイエティ   副サブソサイエティ長  

    2019.6 - 2020.5   

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    Committee type:Academic society

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  • IEEE Shin-etsu Section   Student Activities Chair  

    2019.1 - 2020.12   

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    Committee type:Academic society

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  • 第32回信号処理シンポジウム   TPC委員長  

    2017.11   

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    Committee type:Academic society

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  • ITC-CSCC 2017   TPC Co-chair  

    2017.7   

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    Committee type:Academic society

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  • 電子情報通信学会 基礎・境界ソサイエティ 信号処理研究専門委員会   副委員長  

    2016.6 - 2018.6   

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    Committee type:Academic society

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  • 電子情報通信学会 信越支部   庶務幹事  

    2010.5 - 2012.5   

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    Committee type:Academic society

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  • 映像情報メディア学会 メディア工学研究会 サマーセミナー2010   企画委員長  

    2010   

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    Committee type:Academic society

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  • 電子情報通信学会 基礎・境界ソサイエティ   英文論文誌A編集委員会委員  

    2009.5 - 2013.5   

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    Committee type:Academic society

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  • 電子情報通信学会   大会委員  

    2008.12 - 2009.11   

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    Committee type:Academic society

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  • 電子情報通信学会 知識ベース1群9編   編集幹事  

    2008.1 - 2018.12   

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    Committee type:Academic society

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  • 新潟市粗大ごみ受付センター構築及び開設準備委託業務業者選定委員会   委員  

    2007.7 - 2007.9   

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    Committee type:Municipal

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  • 映像情報メディア学会 メディア工学研究会   幹事  

    2007.5 - 2020.5   

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    Committee type:Academic society

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  • 電子情報通信学会   会誌編集委員会委員  

    2007.5 - 2009.4   

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    Committee type:Academic society

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  • International Workshop on Advanced Image Technology 2006   Securetary  

    2006   

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    Committee type:Academic society

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  • 画像符号化シンポジウム   運営委員  

    2006   

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    Committee type:Academic society

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  • 電子情報通信学会 回路とシステム軽井沢ワークショップ   論文担当幹事  

    2004.10 - 2005.9   

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    Committee type:Academic society

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  • Engineering Sciences Society, IEICE, Japan   Journal Reviewer  

    2003.1   

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    Committee type:Academic society

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  • 電子情報通信学会   大会委員  

    2002.12 - 2003.11   

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    Committee type:Academic society

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  • 電子情報通信学会 回路とシステム軽井沢ワークショップ   総務担当幹事  

    2001.10 - 2002.9   

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  • 電子情報通信学会 基礎・境界ソサイエティ 回路とシステム研究専門委員会   幹事補佐  

    2000.5 - 2002.5   

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    Committee type:Academic society

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Papers

  • RTL Evaluation of ℓ<sub>2</sub>-Norm Approximation with Rotated ℓ<sub>1</sub>-Norm for 2-Tuple Arrays Reviewed

    Shu Abe, Yuya Kodama, Hiroyoshi Yamada, Shogo Muramatsu

    APSIPA Transactions on Signal and Information Processing   14 ( 1 )   1 - 47   2025.1

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1561/116.20240068

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  • Structured Deep Image Prior for Image Denoising with Interscale SURE-LET Reviewed

    Jikai Li, Shogo Muramatsu

    ITE Transactions on Media Technology and Applications   13 ( 1 )   187 - 199   2025.1

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Institute of Image Information and Television Engineers  

    DOI: 10.3169/mta.13.187

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  • Locally-Structured Unitary Network Reviewed

    Yasas GODAGE, Eisuke KOBAYASHI, Shogo MURAMATSU

    APSIPA Transactions on Signal and Information Processing   13 ( 1 )   2024.5

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1561/116.00000308

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  • Convolutional dictionary learning based on filter bank theory : Convolutional network construction using structural constraints Invited Reviewed

    Shogo MURAMATSU

    IEICE ESS Fundamentals Review   17 ( 2 )   116 - 125   2023.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Institute of Electronics, Information and Communications Engineers (IEICE)  

    DOI: 10.1587/essfr.17.2_116

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    Other Link: https://github.com/msiplab/CdlFb

  • Analysis and Synthesis Systems in Image Restoration Invited Reviewed

    Shogo MURAMATSU

    Journal of IEICE   106 ( 1 )   2 - 9   2023.1

  • Sparsity-Aware OCT Volumetric Data Restoration Using Optical Synthesis Model Reviewed

    Ruiki Kobayashi, Genki Fujii, Yuta Yoshida, Takeru Ota, Fumiaki Nin, Hiroshi Hibino, Samuel Choi, Shunsuke Ono, Shogo Muramatsu

    IEEE Transactions on Computational Imaging   8   505 - 520   2022.6

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/TCI.2022.3183396

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    Other Link: https://dblp.uni-trier.de/db/journals/tci/tci8.html#KobayashiFYONHC22

  • Multidimensional Nonseparable Oversampled Lapped Transforms: Theory and Design Reviewed

    Shogo Muramatsu, Kosuke Furuya, Naotaka Yuki

    IEEE TRANSACTIONS ON SIGNAL PROCESSING   65 ( 5 )   1251 - 1264   2017.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/TSP.2016.2633240

    Web of Science

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  • Redundant Transforms and Its Application to Image Restoration Invited Reviewed

    MURAMATSU Shogo

    NIHON GAZO GAKKAISHI   53 ( 4 )   290 - 300   2014.8

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    This article reviews redundant transforms for sparse representation of images. The term &amp;ldquo;sparse representation&amp;rdquo; here denotes a way of signal representation by a linear combination of a small number of vectors, sequences or functions. This representation is used for signal modeling and finds a lot of applications such as signal estimation, restoration and feature extraction. In order to obtain a good sparse representation, it is essential to choose a signal transform appropriately. In this article, redundancy is firstly explained as an effective property of transforms for sparse representation. Then, some problem settings of sparse representation are introduced and their solvers are overviewed. Next, redundant transforms are shown to be successfully applied to image restoration problems. Furthermore, desired properties of transforms for image processing are summarized, and then dictionary learning methods are introduced as a design technique of redundant transforms. Finally, trends of related works are summarized as concluding remarks.

    DOI: 10.11370/isj.53.290

    CiNii Article

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  • Directional Lapped Orthogonal Transform: Theory and Design Reviewed

    Shogo Muramatsu, Dandan Han, Tomoya Kobayashi, Hisakazu Kikuchi

    IEEE TRANSACTIONS ON IMAGE PROCESSING   21 ( 5 )   2434 - 2448   2012.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/TIP.2011.2182055

    Web of Science

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  • Boundary Operation of 2-D Nonseparable Linear-Phase Paraunitary Filter Banks Reviewed

    Shogo Muramatsu, Tomoya Kobayashi, Minoru Hiki, Hisakazu Kikuchi

    IEEE TRANSACTIONS ON IMAGE PROCESSING   21 ( 4 )   2314 - 2318   2012.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/TIP.2011.2181527

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  • A design method of multidimensional linear-phase paraunitary filter banks with a lattice structure Reviewed

    S Muramatsu, A Yamada, H Kiya

    IEEE TRANSACTIONS ON SIGNAL PROCESSING   47 ( 3 )   690 - 700   1999.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/78.747776

    Web of Science

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  • Extended overlap-add and -save methods for multirate signal processing Reviewed

    S Muramatsu, H Kiya

    IEEE TRANSACTIONS ON SIGNAL PROCESSING   45 ( 9 )   2376 - 2380   1997.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1109/78.622960

    Web of Science

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  • Dictionary Learning for Directed Graph Signals via Augmented GFT Reviewed

    Tsubasa NAITO, Ryuto ITO, Yuichi TANAKA, Shogo MURAMATSU

    2024 Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)   2024.12

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

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  • Physics-informed neural networks for inversion of river flow and alternate bar geometry with shallow water model Reviewed

    Yuki Ohara, Daichi Moteki, Shogo Muramatsu, Kiyoshi Hayasaka, Hiroyasu Yasuda

    Physics of Fluids   2024.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0232852

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  • Sparse-coded Time-delay Graph DMD for Prediction of River Water Level Distribution Reviewed

    Ryuto ITO, Tsubasa NAITO, Hiroyasu YASUDA, Masaaki NAGAHARA, Shogo MURAMATSU

    2024 International Technical Conference on Circuits/Systems, Computers, and Communications (ITC-CSCC)   1 - 5   2024.7

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    DOI: 10.1109/itc-cscc62988.2024.10628276

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  • Flow-Path Fitting from Images with Support Vector Regression for River Health Assessment Reviewed

    Phonepaserth Sisaykeo, Hiroyasu Yasuda, Kiyoshi Hayasaka, Shogo Muramatsu

    2024 International Technical Conference on Circuits/Systems, Computers, and Communications (ITC-CSCC)   27   1 - 5   2024.7

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    DOI: 10.1109/itc-cscc62988.2024.10628402

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  • Data-driven seismic response analysis based on dynamic mode decomposition with time-delay embedding Reviewed

    Akihiro SHIOI, Yu OTAKE, Ikumasa YOSHIDA, Shogo MURAMATSU

    Journal of Applied Mechanics, JSCE   2024.2

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • Tangent Space Sampling of Video Sequence with Locally Structured Unitary Network Reviewed

    Godage Yasas, Shogo Muramatsu

    Proc. of IEEE International Conference on Visual Communications Image Processing   2023.12

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  • Realization of Digraph Filters via Augmented GFT Reviewed

    Hotaka Kitamura, Hiroyasu Yasuda, Yuichi Tanaka, Shogo Muramatsu

    Proc. of International Conference on Image Processing   2023.10

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  • Inter-Scae SURE-LET Restoration with Deep Unrolled Image Prior Reviewed

    Jikai LI, Shogo MURAMATSU

    Proc. of IEEE International Conference on Image Processing   2023.10

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  • Inter-scale SURE-LET Denoise with Structured Deep Image Prior: Interpretable Self-supervised Learing Reviewed

    Jikai LI, Shogo Muramatsu

    Proc. of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) 2023   2023.6

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

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  • Multi-resolution Convolutional Dictionary Learning for Riverbed Dynamics Modeling Reviewed

    Eisuke Kobayashi, Hiroyasu Yasuda, Kiyoshi Hayasaka, Yu Otake, Sunsuke Ono, Shogo Muramatsu

    Proc. of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) 2023   2023.6

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

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  • Performance Evaluation of MR-CSC-DMD in River Model Experiment with Groynes Reviewed

    Chen Zhang, Eisuke Kobayashi, Daichi Moteki, Hiroyasu Yasuda, Kiyoshi Hayasaka, Shogo Muramatsu

    Proc. of the 38th International Technical Conference on Circuits/Systems, Computers and Communications   2023.6

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

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  • Data-driven approximation of geotechnical dynamics to an equivalent single-degree-of-freedom vibration system based on dynamic mode decomposition Reviewed

    Akihiro Shioi, Yu Otake, Ikumasa Yoshida, Shogo Muramatsu, Susumu Ohno

    Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards   17 ( 1 )   77 - 97   2023.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Informa UK Limited  

    DOI: 10.1080/17499518.2023.2184479

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  • On the occurrence of sandbars Reviewed

    Daichi Moteki, Shohei Seki, Shogo Muramatsu, Kiyoshi Hayasaka, Hiroyasu Yasuda

    Physics of Fluids   35 ( 1 )   016608 - 016608   2022.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AIP Publishing  

    In channelized alluvial rivers, alternating sandbars are formed by alternating scouring and sedimentation in the downstream direction. The conditions for the occurrence of sandbars are obtained in the stability analysis as when the ratio of channel width to depth, $\beta$, exceeds a critical value due to innate instability of bottom. However, neither the mechanism nor the conditions for the occurrence of sandbars are well understood because it is difficult to quantify bars before or early in the occurrence of that using conventional measurement methods. We conducted experiments in a laboratory flume with slope as a variable to obtain dense data on the geometry of the water surface, bottom surface, and flow depth. We then performed a wavenumber analysis of the measured data to verify the validity of the results estimated by the stability analysis. We calculated the temporal variation of the correlation coefficients between the depth--water surface $r_{wl}$ and depth--bottom $r_{bl}$ along the development stage of the sandbar since flow state could be estimated from the relationship between the flow depth and the water surface/bottom surface. The temporal variation of the correlation suggests that the development process of sandbars can be divided into three phases, and the flow state is different for each phase. We also found that the occurrence time of sandbars would be defined based on the intersection of the temporal variation of $r_{wl}$ and $r_{bl}$. Furthermore, we show that the formation process of the sandbar is independent of Fr.

    DOI: 10.1063/5.0128760

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  • Flow-Path Fitting from Images with Fourier Basis for River Health Assesment Reviewed

    Yuki Takahashi, Shogo Muramatsu, Hiroyasu Yasuda, Kiyoshi Hayasaka, Yu Otake

    Proc. of IEEE International Conference on Image Processing (ICIP) 2022   2022.10

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  • Capture method for digital twin of formation processes of sand bars Reviewed

    Daichi Moteki, Takenori Murai, Tsuyoshi Hoshino, Hiroyasu Yasuda, Shogo Muramatsu, Kiyoshi Hayasaka

    Physics of Fluids   34 ( 034117 )   034117 - 034117   2022.3

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    Publishing type:Research paper (scientific journal)   Publisher:AIP Publishing  

    Hydraulic quantities governing the generation of bedforms (formed spontaneously on the bottoms of rivers) have been investigated through geomorphological methods, laboratory experiments, stability analyses, numerical analyses, and other research methods. Recently, numerical analysis has been conducted using fine spatial grids to accurately describe morphodynamics. However, numerical analysis cannot always describe the real phenomena, because it is based on assumptions. One effective way to verify physical assumptions is to compare numerical analysis with actual measurements of equivalent resolution. Measurement data with high resolution enable the construction of a duplicate of the measurement target on a computer called a “digital twin.” To construct a digital twin of the process of bedforms generation and development, geometries of the water surface and the bed surface must be simultaneously measured. We developed and verified a measurement method for the construction of a digital twin during the generation and development of bedforms. The measurement system uses two cameras and a line laser to simultaneously measure the water surface and bed surface. Accurate refraction correction at the water surface is possible by acquiring the shape of the water surface, allowing the bottom shape to be determined by geometric processing. The method provides sub-millimeter-accurate measurements of the water surface and bottom with a spatial resolution of 0.95 cm longitudinally and 0.038 cm transversely in a 12 m × 0.45 m flume and takes only 1 min per measurement. This method can provide measurement results that contribute to the understanding of the generation and development of bedforms.

    DOI: 10.1063/5.0085574

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  • Design of Non-Separable Oversampled Lapped Transform via Stochastic Optimization for Image Restoration Reviewed

    Soushi TAKAHASHI, Shogo MURAMATSU, Gwanggil JEON

    Proc. of International Workshop on Advanced Image Technology (IWAIT) 2022   2022.1

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    Language:English   Publishing type:Research paper (international conference proceedings)  

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  • Multiresolution Convolutional-Sparse-Coded Dynamic Mode Decomposition and Its Application to Riverbed State Estimation Reviewed

    小林栄裕, 村松正吾, 安田浩保, 早坂圭司

    電子情報通信学会技術研究報告(Web)   122 ( 165(SIP2022 50-79) )   1872 - 1876   2022

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    Language:English   Publisher:IEEE  

    This work proposes convolutional-sparse-coded dynamic mode decomposition<br />
    (CSC-DMD) by unifying extended dynamic mode decomposition (EDMD) and<br />
    convolutional sparse coding. EDMD is a data driven analysis method for<br />
    describing a nonlinear dynamical system with a linear time-evolution equation.<br />
    Compared with existing EDMD methods, CSC-DMD has an advantage of reflecting<br />
    spatial structure of the target. As an example, the proposed method is applied<br />
    to river bed shape estimation from the water surface observation. The<br />
    estimation problem is reduced to sparsity-aware restoration with a hard<br />
    constraint, which is given by the CSC-DMD prediction, where the algorithm is<br />
    derived by the primal-dual splitting method. A time series set of water surface<br />
    and bed shape measured through an experimental river setup is used to train and<br />
    test the system. From the result, the significance of the proposed method is<br />
    verified.

    DOI: 10.1109/ICASSP.2019.8683848

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  • Acceleration of High Dimensional Signal Restoration with Primal-Dual Splitting Reviewed

    山本雅偉, 村松正吾

    映像情報メディア学会技術報告   45 ( 13(IST2021 22-29/ME2021 53-60) )   2021.12

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  • An Efficient Image Processing and Machine Learning based Technique for Skin Lesion Segmentation and Classification Reviewed

    Izbaila Imtiaz, Imran Ahmed, Gwanggil Jeon, Shogo Muramatsu

    Proceedings, APSIPA Annual Summit and Conference 2021   2021.12

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  • Proximal Gradient-Based Loop Unrolling with Interscale Thresholding Reviewed

    Ruiki Kobayashi, Shogo Muramatsu, Shunsuke Ono

    Proceedings, APSIPA Annual Summit and Conference 2021   1687 - 1692   2021.12

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  • River Flow Path Control with Reinforcement Learning Reviewed

    Dongqi Liu, Yutaka Naito, Chen Zhang, Shogo Muramatsu, Hiroyasu Yasuda, Kiyoshi Hayasaka, Yu Otake

    Proc. of 2021 IEEE International Conference on Autonomous Systems (ICAS2021)   212 - 216   2021.8

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    DOI: 10.1109/icas49788.2021.9551113

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  • Improvement of Object Detection from SAR Image Using Speckle Filter Reviewed

    M Ibnul Morshed, Shogo Muramatsu

    Proc. of ITC-CSCC2021   2021.6

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  • Image Restoration with Structured Deep Image Prior Reviewed

    Jikai Li, Ruiki Kobayashi, Shogo Muramatsu, Gwanggil Jeon

    Proc. of ITC-CSCC2021   2021.6

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  • Accuracy improvement of human motion recognition with MW-FMCW radar using CNN

    Fumiya Sakagami, Hiroyoshi Yamada, Shogo Muramatsu

    2020 International Symposium on Antennas and Propagation, ISAP 2020   173 - 174   2021.1

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    DOI: 10.23919/ISAP47053.2021.9391487

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  • Sparse-Coded Dynamic Mode Decomposition on Graph for Prediction of River Water Level Distribution. Reviewed

    Yusuke Arai, Shogo Muramatsu, Hiroyasu Yasuda, Kiyoshi Hayasaka, Yu Otake

    Proc. of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)   3225 - 3229   2021

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    DOI: 10.1109/ICASSP39728.2021.9414533

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  • Practical Dynamic Reliability Analysis with Spatiotemporal Features in Geotechnical Engineering Reviewed

    Yu Otake, Kyohei Shigeno, Yosuke Higo, Shogo Muramatsu

    Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards   2021

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  • Deep neural network for early image diagnosis of Stevens–Johnson syndrome/toxic epidermal necrolysis Reviewed International journal

    Atsushi Fujimoto, Yuki Iwai, Shogo Muramatsu, Takashi Ishikawa, Satoru Shinkuma, Riichiro Abe

    The Journal of Allergy and Clinical Immunology: In Practice   10 ( 1 )   277 - 283   2021

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    BACKGROUND: Stevens-Johnson syndrome (SJS)/toxic epidermal necrolysis (TEN) is a life-threatening cutaneous adverse drug reaction (cADR). Distinguishing SJS/TEN from nonsevere cADRs is difficult, especially in the early stages of the disease. OBJECTIVE: To overcome this limitation, we developed a computer-aided diagnosis system for the early diagnosis of SJS/TEN, powered by a deep convolutional neural network (DCNN). METHODS: We trained a DCNN using a dataset of 26,661 individual lesion images obtained from 123 patients with a diagnosis of SJS/TEN or nonsevere cADRs. The DCNN's accuracy of classification was compared with that of 10 board-certified dermatologists and 24 trainee dermatologists. RESULTS: The DCNN achieved 84.6% sensitivity (95% confidence interval [CI], 80.6-88.6), whereas the sensitivities of the board-certified dermatologists and trainee dermatologists were 31.3 % (95% CI, 20.9-41.8; P < .0001) and 27.8% (95% CI, 22.6-32.5; P < .0001), respectively. The negative predictive value was 94.6% (95% CI, 93.2-96.0) for the DCNN, 68.1% (95% CI, 66.1-70.0; P < .0001) for the board-certified dermatologists, and 67.4% (95% CI, 66.1-68.7; P < .0001) for the trainee dermatologists. The area under the receiver operating characteristic curve of the DCNN for a SJS/TEN diagnosis was 0.873, which was significantly higher than that for all board-certified dermatologists and trainee dermatologists. CONCLUSIONS: We developed a DCNN to classify SJS/TEN and nonsevere cADRs based on individual lesion images of erythema. The DCNN performed significantly better than did dermatologists in classifying SJS/TEN from skin images.

    DOI: 10.1016/j.jaip.2021.09.014

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  • Fixed-Point Arithmetic of l2-Norm Approximation for 2-Tuple Arrays with Rotated l1-Norm Evaluation Reviewed

    Yuya KODAMA, Shogo MURAMATSU, Hiroyoshi YAMADA

    Proceedings, APSIPA Annual Summit and Conference 2020   1216 - 1221   2020.12

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  • Image Restoration by Group Sparsity with Union of Hierarchical DirLOTs Reviewed

    Kazuki Sakashita, Shogo Muramatsu

    Proceedings, APSIPA Annual Summit and Conference 2020   1182 - 1187   2020.12

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  • Convolutional Nonlinear Dictionary with Cascaded Structure Filter Banks. Reviewed

    Ruiki Kobayashi, Shogo Muramatsu

    Proc. of IEEE/IEIE ICCE-Asia 2020   2020.11

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  • Characterisation of the static offset in the travelling wave in the cochlear basal turn Reviewed

    Takeru Ota, Fumiaki Nin, Samuel Choi, Shogo Muramatsu, Seishiro Sawamura, Genki Ogata, Mitsuo P. Sato, Katsumi Doi, Kentaro Doi, Tetsuro Tsuji, Satoyuki Kawano, Tobias Reichenbach, Hiroshi Hibino

    PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY   2020.4

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    DOI: 10.1007/s00424-020-02373-6

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  • DATA DRIVEN DYNAMIC RELIABILITY ANALYSIS BASED ON SPATIOTEMPORAL FEATURE EXTRACTION WITH MODE DECOMPOSITION: APPLICATION FOR EFFECTIVE STRESS DYNAMIC ANALYSIS Reviewed

    大竹雄, 茂野恭平, 渡邉慎也, 肥後陽介, 村松正吾

    土木学会論文集 C(地圏工学)(Web)   76 ( 2 )   142 - 157   2020

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    <p> Recently, the need for the robust design and the resilience design methods under accidental loading of soil structures has been the subject of many discussions. Herein, we are developing a dynamic reliability analysis base on mode decomposition for evaluating the failure mode of the soil structure. This analysis features quantifying uncertainties related to the accuracy of the parameter settings. This paper describes the deformation calculation procedure for the case of a simple embankment on a liquefiable sand layer. We conducted a dynamic effective stress analysis to evaluate the liquefaction phenomenon in the sand layer. This study aimed to derive an alternative numerical analysis model that considers the space and time required for calculating the aforementioned deformed embankment.</p>

    DOI: 10.2208/jscejge.76.2_142

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  • VISUALIZATION OF MICRO MORPHOLOGY FOR SOIL MICROMECHANICS MODELING : AN APPLICATION OF SUPER-RESOLUTION TO X-RAY CT IMAGES

    遠藤尚希, 大竹雄, 肥後陽介, 村松正吾

    土木学会論文集 A2(応用力学)(Web)   76 ( 2 )   2020

  • BASIC STUDY ON OPTIMIZATION OF SENSOR PLACEMENTS FOR REAL TIME ALTERNATIVE SIMULATION

    Taiga SHOJI, Yu OTAKE, Kyohei SHIGENO, Yosuke HIGO, Shogo MURAMATSU

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   76 ( 2 )   I_25 - I_33   2020

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    DOI: 10.2208/jscejam.76.2_i_25

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  • Successive Stripe Artifact Removal Based on Robust PCA for Millimeter Wave Automotive Radar Imageive Radar Image Reviewed

    Weiwei Shan, Shogo Muramatsu, Hiroyoshi Yamada, Akira Oshima

    Proc. of 2019 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)   2019.11

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  • Indoor Human Tracking with Millimeter-Wave Minimum Redundancy MIMO Radar

    Takahiro Horiuchi, Jumpei Konishi, Hiroyoshi Yamada, Shogo Muramatsu

    2019 International Symposium on Antennas and Propagation, ISAP 2019 - Proceedings   2019.10

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  • Experimental Study on Automotive Millimeter Wave SAR in Curved Tracks

    Akira Oshima, Hiroyoshi Yamada, Shogo Muramatsu

    2019 International Symposium on Antennas and Propagation, ISAP 2019 - Proceedings   2019.10

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  • OCT Volumetric Data Restoration with Latent Distribution of Refractive Index Reviewed

    Genki Fujii, Yuta Yoshida, Shogo Muramatsu, Shunsuke Ono, Samuel Choi, Takeru Ota, Fumiaki Nin, Hiroshi Hibino

    Proc. of 2019 IEEE International Conference on Image Processing (ICIP)   764 - 768   2019.9

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    DOI: 10.1109/ICIP.2019.8803737

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  • In Vivo Tomographic Visualization of Intracochlear Vibration Using a Supercontinuum Multifrequency-Swept Optical Coherence Microscope Reviewed

    Samuel Choi, Fumiaki Nin, Takeru Ota, Kouhei Sato, Shogo Muramatsu, Hiroshi Hibino

    Biomedical Optics Express   10 ( 7 )   3317 - 3342   2019.7

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    DOI: 10.1364/BOE.10.003317

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  • Graph Learning & Fast Transform Coding of 3D River Data Reviewed

    Weihang Liao, Gene Cheung, Shogo Muramatsu, Hiroyasu Yasuda, Kiyoshi Hayasaka

    Proc. of 2018 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)   1313 - 1317   2018.11

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  • Single-image Super-resolution using Complex Nonseparable Oversampled Lapped Transforms Reviewed

    Satoshi Nagayama, Shogo Muramatsu, Hiroyoshi Yamada

    Proc. of 2018 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)   1309 - 1312   2018.11

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  • Study on Imaging Method and Doppler Effect for Millimeter Wave Automotive SAR Reviewed

    Takumi Kobayashi, Hiroyoshi Yamada, Yuuichi Sugiyama, Shogo Muramatsu, Yoshio Yamagchi

    Proc. of 2018 International Symposium on Antennas and Propagation (ISAP)   2018.10

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  • Fundamental Study on Ambiguity Suppression of Automotive Squint-mode MW-SAR by Using SIMO Radar Reviewed

    Akira Oshima, Hiroyoshi Yamada, Yoshio Yamaguchi, Shogo Muramatsu

    Proc. of 2018 IEEE International Workshop on Electromagnetics:Applications and Student Innovation Competition (iWEM)   2018.8

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    DOI: 10.1109/iWEM.2018.8536598

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  • OCT Volumetric Data Restoration via Primal-Dual Plug-and-Play Method Reviewed

    Shogo Muramatsu, Samuel Choi, Shunske Ono, Takeru Ota, Fumiaki Nin, Hiroshi Hibino

    Proc. of 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)   801 - 805   2018.4

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    DOI: 10.1109/ICASSP.2018.8462343

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  • Complex nonseparable oversampled lapped transform for sparse representation of millimeter wave radar image Reviewed

    Satoshi Nagayama, Shogo Muramatsu, Hiroyoshi Yamada, Yuuichi S. Giyama

    Proceedings - International Conference on Image Processing, ICIP   2017-   2716 - 2720   2018.2

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    DOI: 10.1109/ICIP.2017.8296776

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  • Millimeter wave radar image denoising with complex nonseparable oversampled lapped transform. Reviewed

    Satoshi Nagayama, Shogo Muramatsu, Hiroyoshi Yamada, Yuuichi Sugiyama

    Proc. of 2017 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)   1824 - 1829   2017.12

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    DOI: 10.1109/APSIPA.2017.8282330

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  • Adaptive Learning Rate Control for Nonseparable Oversampled Lapped Transform Design Reviewed

    Genki Fujii, Shogo Muramatsu

    Proc. of 2017 International Technical Conference on Circuits, Systems, Computers, and Communications(ITC-CSCC)   186 - 189   2017.7

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  • Multifrequency-swept optical coherence microscopy for highspeed full-field tomographic vibrometry in biological tissues Reviewed

    Samuel Choi, Keita Sato, Takeru Ota, Fumiaki Nin, Shogo Muramatsu, Hiroshi Hibino

    BIOMEDICAL OPTICS EXPRESS   8 ( 2 )   608 - 621   2017.2

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    DOI: 10.1364/BOE.8.000608

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  • Embedded Implementation Model of 2-D Non-separable Oversampled Lapped Transforms for Video Processing Reviewed

    Keita Imai, Shogo Muramatsu

    Proc. of 2016 International Technical Conference on Circuits, Systems, Computers, and Communications(ITC-CSCC)   375 - 378   2016.7

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  • Boundary operation of 2D non-separable oversampled lapped transforms Reviewed

    Kosuke Furuya, Shintaro Hara, Kenta Seino, Shogo Muramatsu

    APSIPA Transactions on Signal and Information Processing   5   2016.4

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    DOI: 10.1017/ATSIP.2016.3

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  • Fast Convolution Technique for Non-separable Oversampled Lapped Transforms Reviewed

    Kota Horiuchi, Shogo Muramatsu

    2016 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA)   1 - 6   2016

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    DOI: 10.1109/APSIPA.2016.7820816

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  • FAST IMAGE SUPER-RESOLUTION VIA MULTIPLE DIRECTIONAL TRANSFORMS Reviewed

    Zhiyu Chen, Shogo Muramatsu, Yoshito Abe

    2016 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)   1434 - 1438   2016

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    DOI: 10.1109/ICIP.2016.7532595

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  • EFFICIENT PARAMETER OPTIMIZATION FOR EXAMPLE-BASED DESIGN OF NONSEPARABLE OVERSAMPLED LAPPED TRANSFORM Reviewed

    Shogo Muramatsu, Masaki Ishii, Zhiyu Chen

    2016 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)   3618 - 3622   2016

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    DOI: 10.1109/ICIP.2016.7533034

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  • MULTI-FOCUS PIXEL-BASED IMAGE FUSION IN DUAL DOMAIN Reviewed

    Zhiyu Chen, Shogo Muramatsu

    2016 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING PROCEEDINGS   1736 - 1740   2016

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    DOI: 10.1109/ICASSP.2016.7471974

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  • Multi-Focus Image Fusion Based on Multiple Directional LOTs Reviewed

    Zhiyu Chen, Shogo Muramatsu

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E98A ( 11 )   2360 - U157   2015.11

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    DOI: 10.1587/transfun.E98.A.2360

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  • SURE-LET poisson denoising with multiple directional LOTs Reviewed

    Zhiyu Chen, Shogo Muramatsu

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   E98A ( 8 )   1820 - 1828   2015.8

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    DOI: 10.1587/transfun.E98.A.1820

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  • Video key frame selection by clustering wavelet coefficients

    Satoshi Hasebe, Makoto Nagumo, Shogo Muramatsu, Hisakazu Kikuchi

    European Signal Processing Conference   06-10-   2303 - 2306   2015.4

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  • Parameter transmission via ROI in JPEG2000 for variable-coefficient invertible deinterlacing

    Takuma Ishida, Jun Uchita, Shogo Muramatsu, Hisakazu Kikuchi, Tetsuro Kuge

    European Signal Processing Conference   06-10-   653 - 656   2015.4

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  • 3-D OCT Data Denoising with Nonseparable Oversampled Lapped Transform Reviewed

    Shogo Muramatsu, Samuel Choi, Takumi Kawamura

    2015 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA)   901 - 906   2015

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    DOI: 10.1109/APSIPA.2015.7415402

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  • A design method for oversampled paraunitary dft filter banks using householder factorization

    K. Kajita, H. Kobayashi, S. Muramatsu, A. Yamada, H. Kiya

    European Signal Processing Conference   2015

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  • A new design method of linear-phase paraunitary filter banks with an odd number of channels

    Shogo Muramatsu, Hitoshi Kiya

    European Signal Processing Conference   2015

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  • STRUCTURED DICTIONARY LEARNING WITH 2-D NON-SEPARABLE OVERSAMPLED LAPPED TRANSFORM Reviewed

    Shogo Muramatsu

    2014 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP)   2624 - 2628   2014

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    DOI: 10.1109/ICASSP.2014.6854075

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  • Transposition-based Architecture of 2-D Non-separable Oversampled Lapped Transforms Reviewed

    Kenta Seino, Kosuke Furuya, Shogo Muramatsu

    2014 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA)   1 - 6   2014

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    DOI: 10.1109/APSIPA.2014.7041733

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  • POISSON DENOISING WITH MULTIPLE DIRECTIONAL LOTS Reviewed

    Zhiyu Chen, Shogo Muramatsu

    2014 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP)   98-A ( 8 )   1820 - 1828   2014

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    DOI: 10.1587/transfun.E98.A.1820

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  • POISSON DENOISING WITH MULTIPLE DIRECTIONAL LOTS Reviewed

    Zhiyu Chen, Shogo Muramatsu

    2014 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP)   1225 - 1229   2014

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    DOI: 10.1109/ICASSP.2014.6853792

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  • Image Restoration with Multiple DirLOTs Reviewed

    Natsuki Aizawa, Shogo Muramatsu, Masahiro Yukawa

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E96A ( 10 )   1954 - 1961   2013.10

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    DOI: 10.1587/transfun.E96.A.1954

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  • Embedded Implementation of 2-D Nonseparable Linear-Phase Paraunitary Filter Banks for Video Processing Reviewed

    Kosuke Furuya, Shintaro Hara, Shogo Muramatsu

    Proc. of 2013 International Workshop on Advanced Image Technology (IWAIT)   605 - 609   2013.1

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  • FISTA-Based Image Restoration with Multiple DirLOTs Reviewed

    Natsuki Aizawa, Shogo Muramatsu

    Proc. of 2013 International Workshop on Advanced Image Technology (IWAIT)   642 - 647   2013.1

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  • Lens Distortion Estimation and Compensation for Sheet-Metal Inspection System Reviewed

    Norihisa Terasawa, Shinya Kitazawa, Hidenori Watanabe, Shogo Muramatsu, Takamasa Suzuki, Mitsuyoshi Murata, Toshiro Oitate

    Proc. of 2013 International Workshop on Advanced Image Technology (IWAIT)   648 - 653   2013.1

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  • COLOR-TONE SIMILARITY OF DIGITAL IMAGES Reviewed

    Hisakazu Kikuchi, S. Kataoka, S. Muramatsu, Heikki Huttunen

    2013 20TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP 2013)   393 - 397   2013

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  • Look-up-table-based exponential computation and application to an EM algorithm for GMM Reviewed

    Hidenori Watanabe, Shogo Muramatsu

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   E96-A ( 5 )   935 - 939   2013

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    DOI: 10.1587/transfun.E96.A.935

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  • LATTICE STRUCTURES FOR 2-D NON-SEPARABLE OVERSAMPLED LAPPED TRANSFORMS Reviewed

    Shogo Muramatsu, Natsuki Aizawa

    2013 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP)   5632 - 5636   2013

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    DOI: 10.1109/ICASSP.2013.6638742

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  • IMAGE RESTORATION WITH 2-D NON-SEPARABLE OVERSAMPLED LAPPED TRANSFORMS Reviewed

    Shogo Muramatsu, Natsuki Aizawa

    2013 20TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP 2013)   1051 - 1055   2013

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    DOI: 10.1109/ICIP.2013.6738217

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  • Boundary Operation of 2-D Non-separable Oversampled Lapped Transforms Reviewed

    Kosuke Furuya, Shintaro Hara, Shogo Muramatsu

    2013 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA)   1 - 8   2013

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    DOI: 10.1109/APSIPA.2013.6694258

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  • Simple Bitplane Coding and Its Application to Multi-Functional Image Compression Reviewed

    Hisakazu Kikuchi, Ryosuke Abe, Shogo Muramatsu

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E95A ( 5 )   938 - 951   2012.5

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    DOI: 10.1587/transfun.E95.A.938

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  • Reversible Implementations of Irreversible Component Transforms and Their Comparisons in Image Compression Reviewed

    Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu, Kazuma Shinoda, Jaeho Shin

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E95A ( 4 )   824 - 828   2012.4

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    DOI: 10.1587/transfun.E95.A.824

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  • A Structure-Enhanced Tone Mapping Algorithm for High Dynamic Range Scenes Reviewed

    Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu, Jaeho Shin

    Proc. of 2012 International Conference on Electronics, Information and Communications   2012.2

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  • Image Restoration with Union of Directional Orthonormal DWTs Reviewed

    Shogo Muramatsu, Natsuki Aizawa, Masahiro Yukawa

    2012 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA ASC)   1 - 4   2012

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  • Computerized Sheet-Metal Inspection Based on the Cross Network Communication Reviewed

    Takamasa Suzuki, Kotaro Sato, Shogo Muramatsu, Mitsuyoshi Murata, Toshiro Oitate

    MECHANICAL ENGINEERING AND MATERIALS, PTS 1-3   152-154   331 - +   2012

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    DOI: 10.4028/www.scientific.net/AMM.152-154.331

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  • Color-Tone Similarity on Digital Images Reviewed

    Hisakazu Kikuchi, Heikki Huttunen, Junghyeun Hwang, Masahiro Yukawa, Shogo Muramatsu, Jaeho Shin

    2012 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA ASC)   393 - 397   2012

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    DOI: 10.1109/ICIP.2013.6738081

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  • IMAGE DENOISING WITH UNION OF DIRECTIONAL ORTHONORMAL DWTS Reviewed

    Shogo Muramatsu, Dandan Han

    2012 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP)   1089 - 1092   2012

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    DOI: 10.1109/ICASSP.2012.6288076

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  • SURE-LET Image Denoising with Multiple Directional LOTs Reviewed

    Shogo Muramatsu

    2012 PICTURE CODING SYMPOSIUM (PCS)   229 - 232   2012

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    DOI: 10.1109/PCS.2012.6213334

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  • Image detection of inner wall surface of holes in metal sheets through polarization using a 3D TV monitor Reviewed

    Takamasa Suzuki, Katsunori Nakano, Shogo Muramatsu, Toshiro Oitate

    OPTICAL METROLOGY AND INSPECTION FOR INDUSTRIAL APPLICATIONS II   8563   2012

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    DOI: 10.1117/12.999726

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  • Color-Tone Similarity on Digital Images Reviewed

    Hisakazu Kikuchi, Heikki Huttunen, Junghyeun Hwang, Masahiro Yukawa, Shogo Muramatsu, Jaeho Shin

    2012 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA ASC)   1 - 4   2012

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    Other Link: http://dblp.uni-trier.de/db/conf/apsipa/apsipa2012.html#conf/apsipa/KikuchiHHYMS12

  • 透過型平板金属加工検査システムのためのレンズ歪補正に関する検討(若葉研究者の集い2,サマーセミナー2012~高精細化時代のビジョン技術~)

    寺澤 憲久, 北澤 伸哉, 渡辺 秀典, 村松 正吾, 鈴木 孝昌, 村田 光由, 追立 俊朗

    映像情報メディア学会技術報告   36   23 - 26   2012

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    本研究では,デジタルカメラを用いた高精度且つ低コストな板金検査システムを提案する.提案検査システムは単一のデジタルカメラにより板金の画像を取得し,設計データと比較することで板金の加工誤差を検出する.デジタルカメラにより取得した画像はレンズ歪を有するため,高精度検査システムの実現にはレンズ歪の推定及び補正が必要となる.また,台座の高さや板金の厚みによるズレも考慮する必要がある.本研究では半径歪モデルと位相限定相関法を組み合わせた歪推定,局所的射影変換を用いた歪補正及び高さ・厚み補正の方法を提案する.実験により提案検査システムの検査精度を評価し,精度0.5mmの達成を確認する.

    DOI: 10.11485/itetr.36.34.0_23

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  • SURE-LET Image Denoising with Directional LOTs Reviewed

    Shogo Muramatsu, Dandan Han, Hisakazu Kikuchi

    Proc. of 2011 Asia Pacific Signal and Information Proc. Assoc. Annual Summit and Conf. (APSIPA ASC)   2011.10

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  • An Investigation on the Quality of Denoised Images Reviewed

    Peter Ndajah, Hisakazu Kikuchi, Masahiro Yukawa, Hidenori Watanabe, Shogo Muramatsu

    International Journal of Circuits, Systems, and Signal Processing   5 ( 4 )   423 - 434   2011.7

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  • Statistical Edge Detector with GMM Classifier Reviewed

    Hidenori Watanabe, Yuji Kikuchi, Shogo Muramatsu, Toshiro Oitate, Mitsuyoshi Murata, Takamasa Suzuki

    Proc. of 2011 26th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   611 - 614   2011.6

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  • A reproduction model of film grain texture for digital movies Reviewed

    Muyesaier Mulaaihemaiti, Shun Munekata, Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu, Masahiro Yukawa, Heikki Huttunen, Jaeho Shin

    Proc. of 2011 26th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   819 - 822   2011.6

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  • Edge-aware tone mapping algorithm for high dynamic range imagery Reviewed

    Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu, Jaeho Shin

    Proc. of 2011 26th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   804 - 807   2011.6

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  • Fast Algorithm and Efficient Implementation of GMM-Based Pattern Classifiers Reviewed

    Hidenori Watanabe, Shogo Muramatsu

    JOURNAL OF SIGNAL PROCESSING SYSTEMS FOR SIGNAL IMAGE AND VIDEO TECHNOLOGY   63 ( 1 )   107 - 116   2011.4

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    DOI: 10.1007/s11265-009-0439-z

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  • Online optical verification system for sheet-metal processing Reviewed

    Takamasa Suzuki, Kotaro Sato, Shogo Muramatsu, Mitsuyoshi Murata, Toshiro Oitate

    2011 INTERNATIONAL CONFERENCE ON OPTICAL INSTRUMENTS AND TECHNOLOGY: OPTOELECTRONIC MEASUREMENT TECHNOLOGY AND SYSTEMS   8201   2011

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    DOI: 10.1117/12.906564

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  • A Total Variation-Morphological Image Edge Detection Approach Reviewed

    Peter Ndajah, Hisakazu Kikuchi, Shogo Muramatsu, Masahiro Yukawa, Francis Benyah

    RECENT RESEARCHES IN TELECOMMUNICATIONS, INFORMATICS, ELECTRONICS & SIGNAL PROCESSING   148 - +   2011

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  • 3-6 On Adaptive Basis Switch Coding with 2-D Non-separable GenLOT

    WANG Rui, MURAMATSU Shogo, KIKUCHI Hisakazu

    PROCEEDINGS OF THE ITE ANNUAL CONVENTION   2011   3 - 6-1-_3-6-2_   2011

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    This report proposes an adaptive basis switching technique of two-dimensional (2-D) non-separable (NS) GenLOT for picture coding. The conventional DCT and DWTs are separable and have disadvantage in representing diagonal edges and textures of a given picture. In order to overcome the problem, the authors proposed 2-D NS GenLOT as a previous work. In this work, the adaptive local basis control of overlap and direction is investigated and the significance is verified.

    DOI: 10.11485/iteac.2011.0_3-6-1

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  • Design Method of Directional GenLOT with Trend Vanishing Moments Reviewed

    Shogo Muramatsu, Tomoya Kobayashi, Dandan Han, Hisakazu Kikuchi

    Proc. of 2010 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)   692 - 702   2010.12

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  • SSIM Image Quality Metric for Denoised Images Reviewed

    Peter Ndajah, Hisakazu Kikuchi, Masahiro Yukawa, Hidenori Watanabe, Shogo Muramatsu

    Proc. of 2010 WSEAS Int. Conf. on Visualization, Imaging and Simulation?(VIS’10)   53 - 58   2010.11

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  • Relation between Keypoint Detection Ratio and Fixed-Point Word Length in SIFT Algorithm

    NAGUMO Koji, MURAMATSU Shogo, KIKUCHI Hisakazu

    ITE Technical Report   34 ( 34 )   31 - 32   2010.8

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    DOI: 10.11485/itetr.34.34.0_31

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  • A Computer-Aided Distinction Method of Borderline Grades of Oral Cancer Reviewed

    Mustafa M. Sami, Masahisa Saito, Shogo Muramatsu, Hisakazu Kikuchi, Takashi Saku

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E93A ( 8 )   1544 - 1552   2010.8

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    DOI: 10.1587/transfun.E93.A.1544

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  • An Optimum Design of Error Diffusion Filters Using the Blue Noise in All Graylevels Reviewed

    Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu, Jaeho Shin

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E93A ( 8 )   1465 - 1475   2010.8

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    DOI: 10.1587/transfun.E93.A.1465

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  • Tone-Aware Halftoning Using Optimized Error Diffusion Filters Based on Blue Noise Patterns Reviewed

    Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu

    Journal of Signal Processing   14 ( 4 )   301 - 304   2010.7

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  • Design of Error Diffusion Filter Using Lagrangian Optimization for Digital Halftoning Reviewed

    Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu, Jaeho Shin

    Proc. of 2010 25th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   2010.7

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  • Total Variation Image Denoising Reviewed

    Peter Ndajah, Hisakazu Kikuchi, Shogo Muramatsu

    Proc. of 2010 International Conference on Approximation Theory   2010.3

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  • A Tone-Aware Halftoning Using Optimized Error Diffusion Filters Based on The Blue Noise Masks Reviewed

    Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu

    Proc. of 2010 RISP Int. Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP)   2010.3

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  • Twin-pair rete ridge analysis: a computer-aided method for facilitating objective histopathological distinction between epithelial dysplasia and carcinoma in-situ of the oral mucosa Reviewed

    Mustafa M. Sami, Masahisa Saito, Shogo Muramatsu, Toshihiko Mikami, Kamal Al-Eryani, Jun Cheng, Faleh A. Sawair, Rasha Abu Eid, Hisakazu Kikuchi, Takashi Saku

    Oral Medicine & Pathology   14 ( 3 )   81 - 89   2010.1

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    DOI: 10.3353/omp.14.89

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    Other Link: http://search.jamas.or.jp/link/ui/2010293190

  • Theoretical analysis of trend vanishing moments for directional orthogonal transforms Reviewed

    Shogo Muramatsu, Dandan Han, Tomoya Kobayashi, Hisakazu Kikuchi

    28th Picture Coding Symposium, PCS 2010   130 - 133   2010

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    DOI: 10.1109/PCS.2010.5702440

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  • Reversible component transforms by the LU factorization Reviewed

    Hisakazu Kikuchi, Junghyeun Hwang, Shogo Muramatsu, Jaeho Shin

    28th Picture Coding Symposium, PCS 2010   238 - 241   2010

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    DOI: 10.1109/PCS.2010.5702475

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  • Interval Calculation of EM Algorithm for GMM Parameter Estimation Reviewed

    Hidenori Watanabe, Shogo Muramatsu, Hisakazu Kikuchi

    2010 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS   2686 - 2689   2010

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    DOI: 10.1109/ISCAS.2010.5537044

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  • 2-D NON-SEPARABLE GENLOT WITH TREND VANISHING MOMENTS Reviewed

    Tomoya Kobayashi, Shogo Muramatsu, Hisakazu Kikuchi

    2010 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING   385 - 388   2010

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    DOI: 10.1109/ICIP.2010.5654186

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  • A Proposal of a Reproduction Model of Film Grain Textures in Decoding of Digital Cinema

    Munekata Shun, Kikuchi Hisakazu, Muramatsu Shogo, Yukawa Masahiro

    ITE Technical Report   34   5 - 8   2010

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    DOI: 10.11485/itetr.34.34.0_5

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  • Adaptive Parameter Control and Block-Wise Implementation of Directional GenLOT

    ITE Technical Report   34   47 - 48   2010

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    DOI: 10.11485/itetr.34.34.0_47

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  • Effective Features and a Classification System for Defective Soldering Detection Reviewed

    Kentaro Sugiyama, Tatsuya Miyaguchi, Hisakazu Kikuchi, Shogo Muramatsu, Jun-ichi Kobayashi

    Proc. of 2009 International Workshop on Smart Info-Media Systems in Asia (SISA)   2009.10

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  • Bit-Plane Coding with a New Context Modeling for Applications to High-Quality Images Reviewed

    Hisakazu Kikuchi, Minoru Hiki, Shogo Muramatsu

    Proc. of 2009 International Workshop on Smart Info-Media Systems in Asia (SISA)   160 - 165   2009.10

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  • Histopathological Image Analysis for the Aid in Diagnosis of Oral Borderline Malignancies Reviewed

    Kyosuke Satoh, Mustafa M. Sami, Hisakazu Kikuchi, Shogo Muramatsu, Takashi Saku

    Proc. of 2009 International Workshop on Smart Info-Media Systems in Asia (SISA)   106 - 110   2009.10

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  • Multiplierless Refinement Scheme for Interval Calculation of GMM-Based Classification Reviewed

    Hidenori Watanabe, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2009 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)   282 - 285   2009.10

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  • Simple Bit-plane Coding Conditioned by Expectation Values of Pixels for Lossy-to-Lossless Image Compression Reviewed

    Hisakazu Kikuchi, Shogo Muramatsu

    Proc. of 2009 24th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   393 - 396   2009.7

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  • Digital Halftoning Using an Error Diffusion Filter Optimized for the Blue Noise in Every Uniform Tone Reviewed

    Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu, Jaeho Shin

    Proc. of 2009 24th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   227 - 230   2009.7

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  • Constraints of Second-Order Vanishing Moments on Lattice Structures for Non-separable Orthogonal Symmetric Wavelets Reviewed

    Atsuyuki Adachi, Shogo Muramatsu, Hisakazu Kikuchi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E92A ( 3 )   788 - 797   2009.3

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    DOI: 10.1587/transfun.E92.A.788

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  • SIMPLE BIT-PLANE CODING FOR LOSSLESS IMAGE COMPRESSION AND EXTENDED FUNCTIONALITIES Reviewed

    Hisakazu Kikuchi, Kunio Funahashi, Shogo Muramatsu

    PCS: 2009 PICTURE CODING SYMPOSIUM   361 - 364   2009

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    DOI: 10.1109/PCS.2009.5167351

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  • BLOCK-WISE IMPLEMENTATION OF DIRECTIONAL GENLOT Reviewed

    Shogo Muramatsu, Minoru Hiki

    2009 16TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1-6   3977 - 3980   2009

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    DOI: 10.1109/ICIP.2009.5413823

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  • Motion-compensated spatio-temporal nonseparable filtering for scalable video coding Reviewed

    Minoru Hiki, Shogo Muramatsu, Hisakazu Kikuchi

    Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers   63 ( 11 )   1604 - 1610   2009

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    DOI: 10.3169/itej.63.1604

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  • Two-Degree Vanishing Moments on 2-D Non-separable GenLOT Reviewed

    Tomoya Kobayashi, Shogo Muramatsu, Hisakazu Kikuchi

    2009 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATION SYSTEMS (ISPACS 2009)   248 - 251   2009

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    DOI: 10.1109/ISPACS.2009.5383856

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  • Visual Fidelity of Bilevel Halftones Generated by the Error Diffusion Filter Optimized for the Blue Noise Masks in All Tone Levels Reviewed

    Junghyeun Hwang, Hisakazu Kikuchi, Shogo Muramatsu, Jaeho Shin

    2009 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATION SYSTEMS (ISPACS 2009)   371 - +   2009

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    DOI: 10.1109/ISPACS.2009.5383823

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  • FAST ALGORITHM FOR GMM-BASED PATTERN CLASSIFIER Reviewed

    Shogo Muramatsu, Hidenori Watanabe

    2009 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOLS 1- 8, PROCEEDINGS   633 - 636   2009

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    DOI: 10.1109/ICASSP.2009.4959663

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  • 指向性GenLOTにおける境界処理(セッション4,サマーセミナー(若葉研究者の集い))

    小林 智也, 比企 豊, 村松 正吾, 菊池 久和

    映像情報メディア学会技術報告   33   67 - 68   2009

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    本研究では,指向性GenLOTにおける境界処理について述べる.JPEGやMPEG-2で採用されている離散コサイン変換(DCT)はブロック歪が発生するという問題がある.JPEG2000では基底画像が重複性を持つ離散ウェーブレット変換(DWT)を採用し,ブロック歪を回避している.これらDCT,DWTは可分離処理のため,画像の斜めエッジに適していない.そこで筆者らは指向性GenLOT/DWTを提案している.この変換は指向性設計が可能で,基底画像が重複性を有するためブロック歪を起こさない.しかしながら,対称拡張による境界処理ができず実際の画像処理への妨げとなっていた.本報告では,ラティス構成のパラメータ制御によって,基底画像の重複性を制御可能であることを示し,指向性GenLOT/DWTにおける境界処理が可能となることを示す.

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  • Effective Features for Defective Soldering Detection by Image Analysis

    SUGIYAMA Kentaro, MIYAGUCHI Tatsuya, KIKUCHI Hisakazu, MURAMATSU Shogo, KOBAYASHI Jun-ichi

    ITE Technical Report   33   5 - 8   2009

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    In the optical soldering inspection systems, the existence or nonexistence of soldering paste and unfirm solder are relatively easy to be detected. However, it is difficult to classify the amount, the shape and the state of the fillet of brazed joints. This study aims at a development of an automatic classification system of solder joints on printed circuit boards and an exploration of effective features for defective soldering detection by means of statistical image analysis of digital images. A number of features are selected from textural features to be tested for the classification into 5 typical classes of solder joints. Experiments have shown that they are effective.

    DOI: 10.11485/itetr.33.31.0_5

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  • Lossless-by-Lossy Coding for Scalable Lossless Image Compression Reviewed

    Kazuma Shinoda, Hisakazu Kikuchi, Shogo Muramatsu

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E91A ( 11 )   3356 - 3364   2008.11

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    DOI: 10.1093/ietfec/e91-a.11.3356

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  • Functionally layered video coding for water level monitoring Reviewed

    Sakol Udomsiri, Masahiro Iwahashi, Shogo Muramatsu

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E91A ( 4 )   1006 - 1014   2008.4

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    DOI: 10.1093/ietfec/e91-a.4.1006

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  • Color demosaicing using asymmetric directional interpolation and hue vector smoothing Reviewed

    Yoshihisa Takahashi, Kentaro Hiraki, Hisakazu Kikuchi, Shogo Muramatsu

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E91A ( 4 )   978 - 986   2008.4

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  • Luma-based directional copy interpolation for color bilevel AM halftoning for printing Reviewed

    Hisakazu Kikuchi, Akira Iijima, Shogo Muramatsu, Shigenobu Sasaki

    IEICE ELECTRONICS EXPRESS   5 ( 5 )   170 - 175   2008.3

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    DOI: 10.1587/elex.5.170

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  • Directional Adaptive Nonseparable Interpolation Filter for Sub-pixel Motion Compansation

    HIKI Minoru, MURAMATSU Shogo, KIKUCHI Hisakazu

    ITE Technical Report   32   1 - 4   2008

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    In this work, we evaluate the directional adaptive nonseparable interpolation filter for sub-pixel motion compensation. In the future video coding systems, developing more efficeient interpolation filter for motion compensation is impotant subject to implove coding efficiency. In this work, we develop some nonseparable interpolation filters support different frequency region, and propose a new edge adaptive nonseparable interpolation method altering the filter by edge direction. Simulation for simple edge images and coding experiments for real video are shown.

    DOI: 10.11485/itetr.32.58.0_1

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  • Second Vanishing Moment Constraints on 2-D GenLOT and Its Directional Design

    MURAMATSU Shogo, ADACHI Atsuyuki

    ITE Technical Report   32   9 - 12   2008

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    This work proposes a novel design method of 2-D non-separable linear-phase paraunitary filter banks (LPPUFB). Especially the two-degree vanishing moment constraint is derived for the lattice structure. In the 2 × 2-decomposition case, the authors have already derived the constraint and designed non-separable symmetric orthonormal wavelets with vanishing moments of degree two. This work extends the discussion to more general 2m_y × 2m_x-decomposition case and yields a method to impose the condition to the lattice structure. The constraint is imposed directly on design parameters so that both of the linear-phase and paraunitary property are structurally guaranteed. Since the structure adopted in this work is based on the 2-D separable DCT, 2-D separable GenLOT, a popular lattice structure of DCT-based LPPUFB, is regarded as a special case. The main advantage of non-separable systems is the directional capability. This work allows us to obtain directional non-separable LOT with two-degree vanishing moments. Some design examples are shown to verify the significance of the proposed method.

    DOI: 10.11485/itetr.32.58.0_9

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  • ラティス構成に基づく指向性フィルタバンク設計の検討(サマーセミナー(若葉研究者の集い)「最先端ビジョン技術が拓く画像応用の新境地」)

    安達 充幸, 村松 正吾, 菊池 久和

    映像情報メディア学会技術報告   32   49 - 52   2008

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    本研究では,筆者らが既に提案しているラティス構成に基づく多次元直線位相直交フィルタバンクの設計法を用いて,指向性を考慮した二次元直交対称ウェーブレット変換の設計法を検討する.異方性の自己相関関数モデルに対する最適化設計をとおして,2次のバニッシング・モーメントを持つ指向性フィルタバンクの設計を行い,シミュレーションによる性能評価を行う.

    DOI: 10.11485/itetr.32.35.0_49

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  • Orthogonality of DWT and Correlation of Distortion Reviewed

    Shogo Muramatsu, Atsuyuki Adachi, Minoru Hiki, Hisakazu Kikuchi

    Proc. of 2007 26th Picture Coding Symposium (PCS)   2007.11

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  • Equivalent parallel structure of deinterlacer banks and its application to optimal bit-rate allocation Reviewed

    Minoru Hiki, Shogo Muramatsu, Takuma Ishida, Hisakazu Kikuchi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E90A ( 3 )   642 - 650   2007.3

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    DOI: 10.1093/ietfec/e90-a.3.642

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  • Water Level Tracking with CONDENSATION Algorithm Reviewed

    Shinsuke Kobayashi, Shogo Muramatsu, Hisakazu Kikuchi, Masahiro Iwahashi

    Proc. of 2007 International Workshop on Advanced Image Technology (IWAIT)   750 - 755   2007.1

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  • Scalable Lossless Color Image Compression by a Lossless-By-Lossy Approach Reviewed

    Hisakazu Kikuchi, Kazuma Shinoda, Shogo Muramatsu

    Proc. of 2007 International Workshop on Advanced Image Technology (IWAIT)   789 - 794   2007.1

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  • Water level detection for functionally layered video coding Reviewed

    Masahiro Iwahashi, Sakol Udomsiri, Yuji Imai, Shogo Muramatsu

    2007 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1-7   885 - +   2007

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    DOI: 10.1109/ICIP.2007.4379157

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  • Color demosaicing that takes care of local areas rich in high spatial frequencies Reviewed

    Kentaro Hiraki, Yoshihisa Takahashi, Hisakazu Kikuchi, Shogo Muramatsu

    Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers   61 ( 8 )   1209 - 1217   2007

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    DOI: 10.3169/itej.61.1209

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  • Parameter embedding in motion-JPEG2000 through ROI for variable-coefficient invertible deinterlacing Reviewed

    Jun Uchita, Shogo Muramatsu, Takuma Ishida, Hisakazu Kikuchi

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS   E89D ( 11 )   2794 - 2801   2006.11

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    DOI: 10.1093/ietisy/e89-d.11.2794

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  • Two-Stage Lossless Image Compression by Wavelet-Based Lossy Coding Reviewed

    Kazuma Shinoda, Hisakazu Kikuchi, Shogo Muramatsu

    Proc. of 2006 21st International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   325 - 328   2006.7

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  • Active Contour Description with Curvature Scale Space(CSS) for Video Retrieval Reviewed

    Shinsuke Kobayashi, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2006 International Workshop on Advanced Image Technology (IWAIT)   105 ( 501 )   133 - 138   2006.1

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    This paper proposes a novel active contour description for video retrieval. Some feature descriptors for image content retrieval are defined in MPEG-7. An contour shape descriptor is also defined in the standard for descripting contour shape features of objects in still pictures. It has both of scale and rotation invariant properties since it is based on Curvature Scale Space (CSS). In this paper, we extend this descriptor to the temporal direction for video applications and propose a feature descriptor that compactlly describes an object contour shape and its temporal variation. The proposed descriptor is effective in the situation that both of videos and still pictures are assumed to be retrieved because the descriptor maintains the compatibility with the descriptor of still pictures defined in MPEG-7. From several experimental results, the significance of our proposed descriptors will be evaluated.

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  • Iterative asymmetric average interpolation for color demosaicing of single-sensor digital dcamera data Reviewed

    Y Takahashi, H Kikuchi, S Muramatsu, N Mizutani

    DIGITAL PHOTOGRAPHY II   6069   606907   2006

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    DOI: 10.1117/12.650446

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  • Suppression of PSNR fluctuation in motion-compensated temporal 1/3-transform through non-separable sub-sampling Reviewed

    Minoru Hiki, Takuma Ishida, Shogo Muramatsu, Hisakazu Kikuchi

    2006 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, ICIP 2006, PROCEEDINGS   2153 - +   2006

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    DOI: 10.1109/ICIP.2006.312870

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  • A lossless-by-lossy approach to lossless image compression Reviewed

    Kazuma Shinoda, Hisakazu Kikuchi, Shogo Muramatsu

    2006 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, ICIP 2006, PROCEEDINGS   2265 - +   2006

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    DOI: 10.1109/ICIP.2006.312814

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  • Motion-JPEG2000 codec compensated for interlaced scanning videos Reviewed

    T Ishida, S Muramatsu, H Kikuchi

    IEEE TRANSACTIONS ON IMAGE PROCESSING   14 ( 12 )   2179 - 2191   2005.12

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    DOI: 10.1109/TIP.2005.857255

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  • A new color demosaicing method using asymmetric average interpolation and its iteration Reviewed

    Y Takahashi, H Kikuchi, S Muramatsu, N Mizutani

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E88A ( 8 )   2108 - 2116   2005.8

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    DOI: 10.1093/ietfec/e88-a.8.2108

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  • Mathematical Properties of Deinterlacer Banks Reviewed

    Minoru Hiki, Shogo Muramatsu, Takuma Ishida, Hisakazu Kikuchi

    Proc. of 2005 20th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   1005 - 1006   2005.7

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  • Iterative Asymmetric Average Interpolation for a Single CCD Mosaic Image Invited Reviewed

    Yoshihisa Takahashi, Hisakazu Kikuchi, Shogo Muramatsu, Naoki Mizutani

    Proc. of 2005 20th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   199 - 200   2005.7

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  • Spatio-Temporal Multi-Resolution Analysis through Hierarchical Deinterlacer Banks Reviewed

    Takuma Ishida, Shogo Muramatsu, Jun Uchita, Daisuke Kitagawa, Hisakazu Kikuchi

    Proc. of 2005 International Workshop on Advanced Image Technology (IWAIT)   104 ( 544 )   55 - 60   2005.1

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    In this work, hierarchical deinterlacer banks are proposed as a new tool for spatio-temporal scalable coding. Deinterlacer banks are novel filter banks in the sense that a progressive video sequence is separated into two progressive video sequences of a half rate and interlaced sequences are producted as intermediate data. Unlike the conventional filter banks, the technique is constructed in a way unique to multidimensional systems by using invertible deinterlacers which we have proposed before. In this report, we further investigate spatio-temporal multi-resolution analysis through the deinterlacer banks. We propose hierarchical deinterlacer banks accompanied by the discrete wavelet transform as a spatial transform. The proposed technique provides an interlaced sequence as intermediate data, a half-rate progressive sequence, and a quarter spatial resolution sequence, as well as the original full-resolution full-rate video sequence. It is verified that fine spatio-temporal multi-resolution analysis involved with various formats is given through the multistage process of our proposed deinterlacer banks. Some experimental results show the potential of the proposed filter banks to practical scalable video compression.

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  • Two-Step Detection of Video Shot Boundaries in a Wavelet Transform Domain Reviewed

    Satoshi Hasebe, Shogo Muramatsu, Hisakazu Kikuchi, Makoto Nagumo

    Journal of the Institute of Image Electronics Engineers of Japan   34 ( 1 )   17 - 26   2005

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    DOI: 10.11371/iieej.34.17

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  • Constructing storyboards based on hierarchical clustering analysis Reviewed

    S Hasebe, MM Sami, S Muramatsu, H Kikuchi

    VISUAL COMMUNICATIONS AND IMAGE PROCESSING 2005, PTS 1-4   5960   437 - 445   2005

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    DOI: 10.1117/12.631385

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  • Lossless compression of Motion JPEG2000 integrated with invertible deinterlacing Reviewed

    Takuma Ishida, Shogo Muramatsu, Hisakazu Kikuchi

    Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers   59 ( 7 )   1011 - 1019   2005

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    DOI: 10.3169/itej.59.1011

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  • Performance evaluation of spatio-temporal multi-resolution analysis with deinterlacer banks Reviewed

    T Ishida, S Muramatsu, D Kitagawa, J Uchita, M Hiki, H Kikuchi

    VISUAL COMMUNICATIONS AND IMAGE PROCESSING 2005, PTS 1-4   5960   177 - 188   2005

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    DOI: 10.1117/12.631544

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  • Lossless implementation of motion JPEG2000 integrated with invertible deinterlacing Reviewed

    Takuma Ishida, Shogo Muramatsu, Hisakazu Kikuchi

    Proceedings - IEEE International Symposium on Circuits and Systems   6328 - 6331   2005

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    DOI: 10.1109/ISCAS.2005.1466088

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  • Lossless implementation of motion JPEG2000 integrated with invertible deinterlacing Reviewed

    T Ishida, S Muramatsu, H Kikuchi

    2005 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS), VOLS 1-6, CONFERENCE PROCEEDINGS   6328 - 6331   2005

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    DOI: 10.1109/ISCAS.2005.1466088

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  • Parameter transmission via ROI in JPEG2000 for variable-coefficient invertible deinterlacing. Reviewed

    Takuma Ishida, Jun Uchita, Shogo Muramatsu, Hisakazu Kikuchi, Tetsuro Kuge

    Proc. of 2004 12th European Signal Processing Conference (EUSIPCO), Vienna, Austria, September 6-10, 2004   653 - 656   2004.9

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  • Video key frame selection by clustering wavelet coefficients. Reviewed

    Satoshi Hasebe, Makoto Nagumo, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2004 12th European Signal Processing Conference (EUSIPCO), Vienna, Austria, September 6-10, 2004   2303 - 2306   2004.9

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  • Impact of Chip Duty-factor in DS-UWB Communications: Some Implications of Regulatory Emission Constraints Reviewed

    M. A. Rahman, Shigenobu Sasaki, Jie Zhou, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2004 7th International Symposium on Wireless Personal Multimedia Communications (WPMC)   3   233 - 237   2004.9

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  • Evaluation of selective rake receiver in direct sequence ultra wideband communications Reviewed

    MA Rahman, S Sasaki, J Zhou, S Muramatsu, H Kikuchi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E87A ( 7 )   1742 - 1746   2004.7

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  • Wavelet-Based Keyframe Selection Techniques for Video Abstraction Reviewed

    Satoshi Hasebe, Makoto Nagumo, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2004 19th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   416 - 419   2004.7

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  • Maximally-Decimated Perfect Reconstruction Deinterlacer Banks Based on FCO-Sampling Reviewed

    Daisuke Kitagawa, Takuma Ishida, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2004 19th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   863 - 866   2004.7

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  • Approximate Analyses and Comparisons of Generalized Spatial Correlation for Linear and Circular Antenna Arrays Reviewed

    Jie Zhou, Kenta Ishizawa, Shigenobu Sasaki, Shogo Muramatsu, Hisakazu Kikuchi, Yoshikuni Onozato

    Proc. of 2004 19th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   507 - 510   2004.7

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  • A parameter decimation technique for variable-coefficient invertible deinterlacing Reviewed

    J Uchita, T Ishida, S Muramatsu, H Kikuchi, T Kuge

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E87A ( 6 )   1363 - 1370   2004.6

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  • Online SNR and fading parameter estimation for parallel combinatorial SS systems in Nakagami fading channels Reviewed

    K Uenaga, S Sasaki, K Takizawa, J Zhou, S Muramatsu, H Kikuchi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E87A ( 6 )   1495 - 1499   2004.6

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  • Invertible Deinterlacing with Variable Coefficients Reviewed

    Takuma Ishida, Shogo Muramatsu, Hisakazu Kikuchi, Tetsuro Kuge

    IEICE Trans. on Fundamentals   J87-A ( 2 )   336 - 341   2004.2

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    可変係数型可逆デインタレース処理を提案する.これまでに筆者らは,Motion-JPEG2000のようなフレーム内符号化で問題となるインタレース映像のくし状効果を抑えるために,可逆デインタレース処理を提案した.しかしながら,このデインタレースフィルタは固定係数であり,局所的には必ずしも適しているとはいえなかった.そこで,可逆性を犠牲にすることなく係数を可変とする新たな手法を提案し,画像の局所的性質に適した係数を用いることで画質の更なる改善を行う.シミュレーション結果により評価し,本手法の有効性を確認する.

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  • Generalized spatial correlation equations for antenna arrays in wireless diversity reception: Exact and approximate analyses Reviewed

    J Zhou, K Ishizawa, S Sasaki, S Muramatsu, H Kikuchi, Y Onozato

    IEICE TRANSACTIONS ON COMMUNICATIONS   E87B ( 1 )   204 - 208   2004.1

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  • Generalized Spatial Correlation Equations for Antenna Array in Wireless Diversity Reception: Exact and Approximate Analyses Reviewed

    Jie Zhou, Kentas Ishizawa, Shigenobu Sasaki, Shogo Muramatsu, Hisakazu Kikuchi, Yoshikuni Onozato

    IEICE Trans. on Communications   E87-B ( 1 )   204 - 208   2004.1

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  • Spatial correlation of a circular array antenna and BER performance investigation Reviewed

    K Ishizawa, J Zhou, S Sasaki, S Muramatsu, H Kikuchi

    PROCEEDINGS OF THE 2004 IEEE ASIA-PACIFIC CONFERENCE ON CIRCUITS AND SYSTEMS, VOL 1 AND 2   1   385 - 388   2004

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    DOI: 10.1109/APCCAS.2004.1412776

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  • Parameter embedding method of variable-coefficient invertible deinterlacing into motion-JPEG2000 through ROI Reviewed

    J Uchita, S Muramatsu, T Ishida, H Kikuchi, T Kuge

    2004 47TH MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL II, CONFERENCE PROCEEDINGS   2   425 - 428   2004

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    DOI: 10.1109/MWSCAS.2004.1354184

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  • Perfect reconstruction deinterlacer banks for field scalable video compression Reviewed

    S Muramatsu, T Ishida, H Kikuchi

    ICIP: 2004 INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOLS 1- 5   2279 - 2282   2004

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    DOI: 10.1109/ICIP.2004.1421553

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  • Evaluation of selective Rake receiver in direct sequence ultra wideband communications in the presence of interference Reviewed

    MA Rahman, S Sasaki, J Zhou, S Muramatsu, H Kikuchi

    JOINT UWBST & IWUWBS 2004, CONFERENCE PROCEEDINGS   221 - 225   2004

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    DOI: 10.1109/UWBST.2004.1320968

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  • Performance evaluation of Rake reception of ultra wideband signals over multipath channels from energy capture perspective Reviewed

    MA Rahman, S Sasaki, J Zhou, S Muramatsu, H Kikuchi

    JOINT UWBST & IWUWBS 2004, CONFERENCE PROCEEDINGS   231 - 235   2004

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    DOI: 10.1109/UWBST.2004.1320970

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  • Performance Analysis of Packet Data Transmittion in Aeronautical Communication Systems by DS-CDMA Reviewed

    Kenta Ishizawa, Zhou Jie, Shigenobu Sasaki, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2003 6th International Symposium on Wireless Personal Multimedia Communications (WPMC)   3   460 - 464   2003.10

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  • Impact of Narrowband Interference and Timing Jitter in DS-UWB System Reviewed

    Shigenobu Sasaki, Takumi Kusama, Zhou Jie, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2003 6th International Symposium on Wireless Personal Multimedia Communications (WPMC)   2   274 - 277   2003.10

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  • Invertible deinterlacing with sampling-density preservation: Theory and design Reviewed

    S Muramatsu, T Ishida, H Kikuchi

    IEEE TRANSACTIONS ON SIGNAL PROCESSING   51 ( 9 )   2343 - 2356   2003.9

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    DOI: 10.1109/TSP.2003.815368

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  • A lifting implementation of variable-coefficient invertible deinterlacer with embedded motion detector Reviewed

    T Ishida, T Soyama, S Muramatsu, H Kikuchi, T Kuge

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E86A ( 8 )   1942 - 1948   2003.8

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  • Parameter Decimation for Invertible Deinterlacing with Variable Coefficients Reviewed

    Jun Uchita, Takuma Ishida, Shogo Muramatsu, Hisakazu Kikuchi, Tetsuro Kuge

    Proc. of 2003 18th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   925 - 928   2003.7

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  • Spatial correlation functions for a circular antenna array and their applications in wireless communication systems Reviewed

    J Zhou, S Sasaki, S Muramatsu, H Kikuchi, Y Onozato

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E86A ( 7 )   1716 - 1723   2003.7

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  • Extra encoding of fine grayscale data into 8-bit sRGB color space Reviewed

    H Kikuchi, H Sato, S Hasebe, N Mizutani, S Muramatsu, S Sasaki, J Zhou, S Sekine, Y Abe, Tofukuji, I, M Nakashizuka

    OPTICAL ENGINEERING   42 ( 7 )   1940 - 1948   2003.7

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  • Online SNR and Fading Parameter Estimation for Parallel Combinatorial SS Systems in Nakagami Fading Channels Reviewed

    Shigenobu Sasaki, Kazuyuki Uenaga, Ken-ichi Takizawa, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2003 18th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   394 - 397   2003.7

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  • Performance analysis of a DS-CDMA cellular system with cell splitting into macrocell and microcell architecture Reviewed

    J Zhou, S Sasaki, S Muramatsu, H Kikuchi, Y Onozato

    IEICE TRANSACTIONS ON COMMUNICATIONS   E86B ( 6 )   1967 - 1977   2003.6

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  • M-ary TH/CSK Modulation for Ultra-wideband Communications Reviewed

    Shigenobu Sasaki, Tomohiko Suzuki, Zhou Jie, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2003 International workshop on ultra wideband systems   2003.6

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  • Quality-Oriented Image Coding Using an Objective Measure of PSNR Reviewed

    Naoki Mizutani, Hiroto Sato, Shigenobu Sasaki, Shogo Muramatsu, Zhou Jie, Hisakazu Kikuchi

    Journal of Signal Processing   7 ( 3 )   229 - 237   2003.5

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  • Performance of Online SNR Estimation for Multicode DS/SS Systems in Multipath Fading Channels Reviewed

    Shigenobu Sasaki, Ken-ichi Takizawa, Kazuyuki Uenaga, Zhou Jie, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2003 World Wireless Congress   2003.5

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  • Lifting architecture of invertible deinterlacing Reviewed

    T Soyama, T Ishida, S Muramatsu, H Kikuchi, T Kuge

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E86A ( 4 )   779 - 786   2003.4

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  • Invertible deinterlacing with variable coefficients and its lifting implementation Reviewed

    T Ishida, S Muramatsu, H Kikuchi, T Kuge

    2003 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL III, PROCEEDINGS   105 - 108   2003

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  • Invertible deinterlacing with variable coefficients and its lifting implementation Reviewed

    T Ishida, S Muramatsu, H Kikuchi, T Kuge

    2003 INTERNATIONAL CONFERENCE ON MULTIMEDIA AND EXPO, VOL III, PROCEEDINGS   177 - 180   2003

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    DOI: 10.1109/ICME.2003.1221277

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  • Two-step algorithm for detecting video shot boundaries in a wavelet transform domain Reviewed

    S Hasebe, S Muramatsu, S Sasaki, J Zhou, H Kikuchi

    ISPA 2003: PROCEEDINGS OF THE 3RD INTERNATIONAL SYMPOSIUM ON IMAGE AND SIGNAL PROCESSING AND ANALYSIS, PTS 1 AND 2   1   245 - 250   2003

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    DOI: 10.1109/ISPA.2003.1296902

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  • DWT gain compensation of motion-JPEG2000 for invertible deinterlacer Reviewed

    T Ishida, S Muramatsu, Z Jie, S Sasaki, H Kikuchi

    2003 INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOL 2, PROCEEDINGS   223 - 226   2003

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    DOI: 10.1109/ICIP.2003.1246657

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  • Spatial correlation for a circular antenna array and its applications in wireless communications Reviewed

    J Zhou, S Sasaki, S Muramatsu, H Kikuchi, Y Onozato

    GLOBECOM'03: IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-7   1108 - 1113   2003

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    DOI: 10.1109/GLOCOM.2003.1258410

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  • Performance analysis of diversity reception schemes with STD in correlated Rayleigh fading channels Reviewed

    J Zhou, H Kikuchi, S Sasaki, S Muramatsu, Y Onozato

    2003 INTERNATIONAL CONFERENCE ON COMMUNICATION TECHNOLOGY, VOL 1 AND 2, PROCEEDINGS   2   870 - 873   2003

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    DOI: 10.1109/ICCT.2003.1209670

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  • Online SNR estimation for parallel combinatorial SS systems in Nakagami fading channels Reviewed

    K Takizawa, S Sasaki, J Zhou, S Muramatsu, H Kikuchi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E85A ( 12 )   2847 - 2858   2002.12

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  • Performance investigation of two transmit diversity schemes with perfect/imperfect channel evaluation in wireless communications Reviewed

    J Zhou, H Kikuchi, S Sasaki, S Muramatsu, Y Onozato

    IEICE TRANSACTIONS ON COMMUNICATIONS   E85B ( 10 )   1957 - 1965   2002.10

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  • Performance Evaluation of Iterative Demodulation and Decoding for Coded Parallel Combianatorial SS Systems through a Uniform Interleaver Reviewed

    Kenichi Takizawa, Shigenobu Sasaki, Jie Zhou, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2002 IEEE International Symposium on Spread Spectrum Techniques and Applications   736 - 740   2002.9

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  • Reversible conversion between interlaced and progressive scan formats and its efficient implementation. Reviewed

    Hisakazu Kikuchi, Shogo Muramatsu, Takuma Ishida, Tetsuro Kuge

    Proc. of 2002 11th European Signal Processing Conference (EUSIPCO)   1 - 4   2002.9

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  • Online SNR Estimation for Turbo Coded Multicode DS/SS Systems Reviewed

    Ken-ichi Takizawa, Shigenobu Sasaki, Zhou Jie, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2002 17th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   2   1316 - 1319   2002.7

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  • Forward link performance of TDMA/W-CDMA spectrum overlaid system with interference cancellation for future wireless communications Reviewed

    J Zhou, H Kikuchi, S Sasaki, S Muramatsu, Y Onozato

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E85A ( 7 )   1536 - 1545   2002.7

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  • Performance bounds in convolutional coded parallel combinatorial SS systems Reviewed

    K Takizawa, S Sasaki, S Muramatsu, J Zhou, H Kikuchi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E85A ( 7 )   1696 - 1701   2002.7

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  • Mapping of Fine Grayscale Data into the sRGB Color Space Reviewed

    Hisakazu Kikuchi, Hiroto Sato, Satoshi Hasebe, Naoki Mizutani, Shogo Muramatsu, Shigenobu Sasaki, Zhou Jie, Seishi Sekine, Yoshito Abe, Makoto Nakashizuka

    Proc. of 2002 17th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   2   987 - 990   2002.7

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  • Lifting Implementation of Reversible Deinterlacer Reviewed

    Takuma Ishida, Tatsuumi Soyama, Shogo Muramatsu, Hisakazu Kikuchi, Tetsuro Kuge

    Proc. of 2002 17th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   1   90 - 93   2002.7

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  • Analysis of Forward Link Capacity of a CDMA Cellular System with Mixed Cell Sizes Reviewed

    Hao Zhao, Hisakazu Kikuchi, Zhou Jie, Shigenobu Sasaki, Shogo Muramatsu

    Proc. of 2002 International Conference on Telecommunications   1   2002.6

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  • Performance of CDMA cellular system with effects of soft handover under log-normal shadow channels Reviewed

    J Zhou, H Kikuchi, S Sasaki, S Muramatsu, Y Onozato

    2002 INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CIRCUITS AND SYSTEMS AND WEST SINO EXPOSITION PROCEEDINGS, VOLS 1-4   1   332 - 336   2002

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    DOI: 10.1109/ICCCAS.2002.1180632

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  • Error rate performance bounds in block coded parallel combinatorial SS systems through a uniform interleaver Reviewed

    K Takizawa, S Sasaki, J Zhou, S Muramatsu, H Kikuchi

    2002 IEEE SEVENTH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES AND APPLICATIONS, VOLS 1-3, PROCEEDINGS   736 - 740   2002

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  • Online SNR estimation for parallel combinatorial SS systems in nakagami fading channels Reviewed

    K Takizawa, S Sasaki, H Zhou, S Muramatsu, H Kikuchi

    GLOBECOM'02: IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-3, CONFERENCE RECORDS   1239 - 1243   2002

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    DOI: 10.1109/GLOCOM.2002.1188395

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  • Online SNR estimation for parallel combinatorial SS systems in nakagami fading channels Reviewed

    K Takizawa, S Sasaki, H Zhou, S Muramatsu, H Kikuchi

    GLOBECOM'02: IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-3, CONFERENCE RECORDS   E85-A ( 12 )   1239 - 1243   2002

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  • Convergence rate evaluation of a DS-CDMA cellular system with centralized power control by genetic algorithms Reviewed

    J Zhou, JN Chen, H Kikuchi, S Sasaki, S Muramatsu

    WCNC 2002: IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE RECORD, VOLS 1 & 2   177 - 182   2002

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    DOI: 10.1109/WCNC.2002.993486

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  • A design method of invertible de-interlacer with sampling density preservation Reviewed

    S Muramatsu, T Ishida, H Kikuchi

    2002 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOLS I-IV, PROCEEDINGS   3277 - 3280   2002

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    DOI: 10.1109/ICASSP.2002.5745353

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  • Spectrum efficiency of a TDMA/W-CDMA frequency sharing system with notch filters and signal clippers Reviewed

    H Kikuchi, J Zhou, S Sasaki, S Muramatsu, Y Onazato

    2002 INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CIRCUITS AND SYSTEMS AND WEST SINO EXPOSITION PROCEEDINGS, VOLS 1-4   1   192 - 196   2002

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    DOI: 10.1109/ICCCAS.2002.1180601

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  • Iterative demodulation and decoding for parallel combinatorial SS systems Reviewed

    KI Takizawa, S Sasaki, S Muramatsu, H Kikuchi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E84A ( 12 )   2991 - 2999   2001.12

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  • Convergence Rate Comparison of a DS-CDMA System with Centralized Power Control by Genetic Algorithms Reviewed

    Zhou Jie, Yoshikuni Onozato, Hisakazu Kikuchi, Shigenobu Sasaki, Shogo Muramatsu

    Proc. of 2001 Investigation of a CDMA Cellular System with Various Traffic Distribution, Solved by Combination of Tilted Antenna Array and Power Control   119 - 124   2001.10

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  • Investigation of a CDMA Cellular System with Various Traffic Distribution, Solved by Combination of Tilted Antenna Array and Power Control Reviewed

    Zhou Jie, Hisakazu Kikuchi, Shigenobu Sasaki, Shogo Muramatsu, Yoshikuni Onozato

    Proc. of 2001 International Conference on ITS Telecommunication   113 - 118   2001.10

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  • Separate FEC coding for parallel combinatorial spread spectrum communication systems. Reviewed

    Shigenobu Sasaki, Ken-ichi Takizawa, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2001 12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)   F11 - F15   2001.9

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    DOI: 10.1109/PIMRC.2001.965285

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  • Memory access estimation of filter bank implementation on different DSP architectures Reviewed

    N Mizutani, S Muramatsu, H Kikuchi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E84A ( 8 )   1951 - 1959   2001.8

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  • Video Querying Based on Three-Dimensional Wavelet Transforms Reviewed

    Satoshi Hasebe, Shogo Muramatsu, Shigenobu Sasaki, Hisakazu Kikuchi

    Proc. of 2001 16th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   2   1196 - 1199   2001.7

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  • Memory Access Estimation in Filter Bank Implementations Reviewed

    Naoki Mizutani, Takuma Ishida, Shogo Muramatsu, Shigenobu Sasaki, Hisakazu Kikuchi

    Proc. of 2001 16th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   2   696 - 699   2001.7

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  • Convolutional Coded Parallel Combinatorial Spread Spectrum Systems with Iterative Demodulation and Decoding Reviewed

    Ken-ichi Takizawa, Shigenobu Sasaki, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2001 16th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   2   740 - 743   2001.7

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  • On FEC Coding for Parallel Combinatorial Cpread Spectrum Systems Reviewed

    Shigenobu Sasaki, Shuho Meguro, Ken-ichi Takizawa, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2001 4th International Symposium on Multidimensional Mobile Communications   66 - 73   2001.6

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  • Iterative demodulation and decoding for parallel combinatorial SS systems Reviewed

    KI Takizawa, S Sasaki, Z Jie, S Muramatsu, H Kikuchi

    GLOBECOM &apos;01: IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-6   2   811 - 815   2001

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    DOI: 10.1109/GLOCOM.2001.965531

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  • Forward link power control strategy and its optimum issue on CDMA cellular network Reviewed

    J Zhou, Y Onozato, S Sasaki, S Muramatsu, H Kikuchi

    NINTH IEEE INTERNATIONAL CONFERENCE ON NETWORKS, PROCEEDINGS   498 - 503   2001

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    DOI: 10.1109/ICON.2001.962392

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  • A Motion Estimation with Two Images of Less Gray Level? Reviewed

    Masayuki Kurosaki, Shogo Muramatsu, Hitoshi Kiya

    IEICE Trans. on Fundamentals   J83-A ( 12 )   1434 - 1440   2000.12

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    低階調画像を用いて動きベクトルを推定する場合,動きベクトルの推定精度は,量子化の際のしきい値の値に依存する.本論文では,しきい値を計算するための演算量を低減する二つの方法を提案する.一つは2種類の低階調画像を用いる方法で,他の一つは,マクロブロックを分割し,より細かい単位でしきい値を計算する方法である.これらの二つの方法は組み合わせて使用することも可能である.シミュレーションにより,提案法は,動きベクトルの推定精度を保ち,しきい値決定に要する演算量を低減できることが確認できた.

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  • A Fast Motion Estimation in the Wavelet Transform Domain for Video Compression Reviewed

    Sanghyun Joo, Shogo Muramatsu, Hisakazu Kikuchi

    Proc. of 2000 IEEE International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)   1   68 - 71   2000.11

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  • Motion estimation with power scalability and its VHDL model Reviewed

    A Takagi, S Muramatsu, H Kiya

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E83A ( 8 )   1608 - 1613   2000.8

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  • Error Resilience in Image Transmission Using LVQ and Turbo Coding Reviewed

    Junghyeun Hwang, Sanghyun Joo, Hisakazu Kikuchi, Shigenobu Sasaki, Shogo Muramatsu, Jueho Shin

    Proc. of 2000 15th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   1   478 - 481   2000.7

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  • A bit-operation algorithm of the median-cut quantization and its hardware architecture Reviewed

    S Muramatsu, H Kiya, A Yamada

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E83A ( 2 )   320 - 328   2000.2

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  • Motion estimation with power scalability and its VHDL model Reviewed

    A Takagi, S Muramatsu, H Kiya

    2000 INTERNATIONAL CONFERENCE ON IMAGE PROCESSING, VOL III, PROCEEDINGS   3   118 - 121   2000

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    DOI: 10.1109/ICIP.2000.899309

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  • Two-channel QMF bank without checkerboard effect and its lattice structure Reviewed

    Y Harada, S Muramatsu, H Kiya

    ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE   82 ( 11 )   74 - 85   1999.11

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  • A Unified Module Architecture for Forward and Inverse Discrete Wavelet Transforms Reviewed

    Shogo Muramatsu, Hitoshi Kiya, Akihiko Yamada

    Proc. of 2000 European Conference on Circuit Theory and Design (ECCTD)   1   583 - 586   1999.9

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  • Consideration on Low Power Motion Estimation with Less Gray Level Images Reviewed

    Ayuko Takagi, Hitoshi Kiya, Shogo Muramatsu, Akihiko Yamada

    Proc. of 1999 14th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   1   9 - 12   1999.7

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  • VLSI Architecture of Motion Estimator with 8×8 Block Mode for MPEG4 and Its VHDL Model Reviewed

    Kenji Sakamoto, Shogo Muramatsu, Hitoshi Kiya, Akihiko Yamada

    Proc. of 1999 14th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   1   340 - 343   1999.7

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  • inear-Phase Paraunitary Filter Banks for Image Processing Reviewed

    MURAMATSU Shogo

    Tokyo Metropolitan University   1 - 134   1998.11

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  • A design method of 2-D axial-symmetric paraunitary filter banks with a lattice structure. Reviewed

    Shogo Muramatsu, Akihiko Yamada, Hitoshi Kiya

    Proc. of 1998 9th European Signal Processing Conference (EUSIPCO)   1 - 4   1998.9

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  • Multidimensional multirate filter without checkerboard effects. Reviewed

    Yasuhiro Harada, Shogo Muramatsu, Hitoshi Kiya

    Proc. of 1998 9th European Signal Processing Conference (EUSIPCO)   1 - 4   1998.9

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  • The two-dimensional lapped Hadamard transform Reviewed

    S Muramatsu, A Yamada, H Kiya

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E81A ( 8 )   1542 - 1549   1998.8

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  • Multidimensional multirate filter and filter bank without checkerboard effect Reviewed

    Y Harada, S Muramatsu, H Kiya

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E81A ( 8 )   1607 - 1615   1998.8

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  • A design method of odd-channel linear-phase paraunitary filter banks with a lattice structure Reviewed

    S Muramatsu, H Kiya

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E81A ( 5 )   976 - 980   1998.5

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  • The Two-Dimensional Lapped Hadamard Transform Reviewed

    Shogo Muramatsu, Akihiko Yamada, Hitoshi Kiya

    Proc. of 1998 IEEE International Symposium on Circuits and Systems (ISCAS)   5   86 - 89   1998.5

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    DOI: 10.1109/ISCAS.1998.694414

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  • A Design Method of Odd-Channel Linear-Phase Paraunitary Filter Banks with a Lattice Structure Reviewed

    Shogo Muramatsu, Hitoshi Kiya

    IEICE Trans. on Fundamentals   E81-A ( 5 )   976 - 980   1998.5

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    In this letter, a design method of linear-phase paraunitary filter banks is proposed for an odd number of channels. In the proposed method, a non-linear unconstrained optimization process is assumed to be applied to a lattice structure which makes the starting guess of design parameters simple. In order to avoid insignificant local minimum solutions, a recursive initialization procedure is proposed. The significance of our proposed method is verified by some design examples.

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  • The two-dimensional lapped Hadamard transform Reviewed

    S Muramatsu, A Yamada, H Kiya

    ISCAS '98 - PROCEEDINGS OF THE 1998 INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-6   E81-A ( 8 )   D86 - D89   1998

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  • Two-Channel QMF Bank without Checkerboard Effect and Its Lattice Structure Reviewed

    HARADA Yasuhiro, MURAMATSU Shogo, KIYA Hitoshi

    The Transactions of the Institute of Electronics,Information and Communication Engineers. A   80 ( 11 )   1857 - 1867   1997.11

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    フィルタバンクは,多くの場合,完全再構成条件を満たすように設計されるが,実際の使用においては,必ずしもこの条件は満足されない.このとき,フィルタバンクは時変システムとして動作し,この時変性の影響によりチェス盤ひずみが発生する.本論文では,2分割フィルタバンクにおいて,有限語長実現の影響や完全再構成条件を満たさない場合も含めチェス盤ひずみの考察を行い,チェス盤ひずみを回避するための条件を一般的に定式化する.また,その条件を満足するパラユニタリQMFバンクの設計法およびそのラティス構成による実現法を示す.更に,有限語長で実現する際に,このラティス構成を用いることにより回転角に補正角を加えることでチェス盤ひずみを極力抑えることが可能であることを示す.

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  • An efficient structure of generalized lapped orthogonal transforms for finite-duration sequences and its application to M-band discrete-time wavelet transforms Reviewed

    S Muramatsu, H Kiya

    ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE   80 ( 10 )   39 - 50   1997.10

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  • FTT-based implementation of sampling rate conversion with a small number of delays Reviewed

    XX Zou, S Muramatsu, H Kiya

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E80A ( 8 )   1367 - 1375   1997.8

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  • Block sampling rate conversion for delay reduction Reviewed

    XX Zou, S Muramatsu, H Kiya

    ISCAS '97 - PROCEEDINGS OF 1997 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS I - IV   4   2357 - 2360   1997

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    DOI: 10.1109/ISCAS.1997.612796

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  • A design method of multidimensional linear-phase paraunitary filter banks with a lattice structure Reviewed

    S Muramatsu, A Yamada, H Kiya

    IEEE TENCON&apos;97 - IEEE REGIONAL 10 ANNUAL CONFERENCE, PROCEEDINGS, VOLS 1 AND 2   1   69 - 72   1997

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    DOI: 10.1109/TENCON.1997.647260

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  • An Efficient Structure of GenLOT for Finite-Duration Sequences and Its Application to M-Band Discrete-Time Wavelet Transforms Reviewed

    Shogo Muramatsu, Hitoshi Kiya

    IEICE Trans. on Fundamentals   J79-A ( 12 )   1966 - 1976   1996.12

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    本論文では,サブバンド画像符号化において応用が期待されている一般化重複直交変換(GenLOT: Generalized Lapped Orthogonal Transforms)の有限長信号に対する効果的な構成を提案する.有限長信号とフィルタとの直線畳込みを行うと,出力信号の点数が増加する.この理由から,サブバンド画像符号化において直線畳込みを行うことは望ましくない.そこで,この問題の解決法として,有限長信号を対称かつ周期的に拡張し,畳込みを行う対称拡張法が提案されている.この方法は,信号境界部分でのひずみが少ない点で循環畳込みよりも優れている.今回提案するGenLOTの構成は,信号拡張による冗長な処理を伴わずに対称拡張法を実現するものであり,高速処理が可能な利点ももつ.また,重複直交変換(LOT: Lapped Orthogonal Transforms)の有限長信号に対する構成の一般化としてみなすことができる.本論文では,更に,提案する構成のM帯域の離散時間ウェーブレット(DTWT: Discrete-Time Wavelet Transforms)への拡張についても議論する.結果として,M帯域DTWTにおいても,有限長信号に対する効果的な構成が得られることを示す.

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  • A design method for oversampled paraunitary DFT filter banks using householder factorization. Reviewed

    Kuniyuki Kajita, Hiroyuki Kobayashi, Shogo Muramatsu, Akihiko Yamada, Hitoshi Kiya

    Proc. of 1996 8th European Signal Processing Conference (EUSIPCO)   1 - 4   1996.9

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  • A new design method of linear-phase paraunitary filter banks with an odd number of channels. Reviewed

    Shogo Muramatsu, Hitoshi Kiya

    Proc. of 1996 8th European Signal Processing Conference (EUSIPCO)   1 - 4   1996.9

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  • A new factorization technique for the generalized linear-phase LOT and its fast implementation Reviewed

    S Muramatsu, H Kiya

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E79A ( 8 )   1173 - 1179   1996.8

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  • Design Methods for Oversampled DFT Filter Banks Reviewed

    Kuniyuki Kajita, Kobayashi Hiroyuki, Shogo Muramatsu, Akihiko Yamada, Hitoshi Kiya

    Proc. of 1996 11st International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC)   1122 - 1125   1996.7

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  • The generalized overlap-add and overlap-save methods using discrete sine and cosine transforms for FIR filtering Reviewed

    XX Zou, S Muramatsu, H Kiya

    ICSP '96 - 1996 3RD INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING, PROCEEDINGS, VOLS I AND II   1   91 - 94   1996

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    DOI: 10.1109/ICSIGP.1996.566980

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  • PARALLEL-PROCESSING TECHNIQUES FOR MULTIDIMENSIONAL SAMPLING LATTICE ALTERATION BASED ON OVERLAP-ADD AND OVERLAP-SAVE METHODS Reviewed

    S MURAMATSU, H KIYA

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E78A ( 8 )   934 - 943   1995.8

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  • Optimum Block size of Discrete Sine and cosine Transforms for Symmetric Convolution Reviewed

    Xiaoxia Zou, Shogo Muramatsu, Hitoshi Kiya

    Proc. of 1995 10th Joint Technical Conference on Circuits/Systems, Computers and Communications (JTC-CSCC)   1   101 - 104   1995.7

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  • AN EXTENDED OVERLAP-ADD METHOD AND OVERLAP-SAVE METHOD FOR SAMPLING RATE CONVERSION Reviewed

    S MURAMATSU, H KIYA

    ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE   78 ( 3 )   62 - 73   1995.3

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  • Multidimensional parallel processing methods for rational sampling lattice alteration Reviewed

    S MURAMATSU, H KIYA

    1995 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-3   756 - 759   1995

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    DOI: 10.1109/ISCAS.1995.521627

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  • RESOLUTION CONVERSION METHOD WITH ARBITRARY RATIONAL VALUES FOR TRANSFORM-CODED IMAGES Reviewed

    S MURAMATSU, H KIYA

    ELECTRONICS AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC SCIENCE   77 ( 10 )   37 - 48   1994.10

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  • An Extended Overlap-Add Method and Save Method for Sampling Rate Conversion (in Japanese) Reviewed

    Shogo Muramatsu, Hitoshi Kiya

    電子情報通信学会論文誌 A   J77-A ( 8 )   1046 - 1055   1994.8

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  • Resolution Conversion Method with Arbitrary Rational Values for Transform-Coded Images Reviewed

    MURAMATSU Shogo, KIYA Hitoshi

    The Transactions of the Institute of Electronics,Information and Communication Engineers. A   77 ( 3 )   369 - 378   1994.3

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    ディジタル画像データの通信や蓄積の分野において,直交変換に基づく拡大・縮小処理が,その容易さと有効性から,画像の解像度変換への応用に期待されている.この解像度変換法は,もし順変換と逆変換の行列サイズを任意に選択可能ならば,その変換倍率を任意の有理数に選ぶことができる.しかしながら,国際規格等によって,符号化の際の変換サイズは決まっており,復号側において,変換倍率を任意に選ぶことが不可能となる.例えば変換サイズがNの場合,変換倍率は1/Nの整数倍に制限されてしまう.そこで本論文では,符号化の際の変換サイズが固定の場合においても,任意の有理数倍率の解像度変換を可能にする方法について提案する.提案法の基本原理は,従来法と間引き処理を組み合わせた構成であり,より一般的な形として位置づけることができる.また,フィルタバンクとマルチレートシステムに基づく考察により,提案法の効果的な構成を示す.この結果,任意の有理数倍率の変換においても,従来法と同程度の演算量で実行可能となる.また,DCTとLOTを使用したシミュレーションを行い,提案法の有効性を示し,DCTのもつ問題点を指摘する.

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  • AN EXTENDED OVERLAP-ADD METHOD AND OVERLAP-SAVE METHOD FOR SAMPLING RATE CONVERSION Reviewed

    S MURAMATSU, H KIYA

    1994 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL 2   77 ( 8 )   B313 - B316   1994

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    DOI: 10.1109/ISCAS.1994.408967

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  • SCALE FACTOR OF RESOLUTION CONVERSION BASED ON ORTHOGONAL-TRANSFORMS Reviewed

    S MURAMATSU, H KIYA, M SAGAWA

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E76A ( 7 )   1150 - 1153   1993.7

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  • Scale Factor of Resolution Conversion in Transform/Subband Domain Reviewed

    Shogo MURAMATSU, Hitoshi KIYA

    Proc. of 1993 Joint Technical Conference on Circuits/Systems, Computers and Communications (JTC-CSCC)   179 - 184   1993.7

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Books

  • カメラ×センサ!ラズベリー・パイ製作全集[基盤3枚入り] : すぐに作れるAI/ロボット/スパコンからソフトウェア・ラジオ/ハイレゾ・オーディオまで

    トランジスタ技術編集部

    CQ出版  2019  ( ISBN:9784789847025

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  • MATLABによる画像&映像信号処理―ツールを使った実践的アプリケーション開発 (ディジタル信号処理シリーズ)

    村松 正吾( Role: Sole author)

    CQ出版  2007.5  ( ISBN:4789830942

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  • マルチメディア技術の基礎 DCT(離散コサイン変換)入門―JPEG/MPEGからウェーブレット、重複直交変換(LOT)まで (エッセンス・シリーズ)

    貴家 仁志, 村松 正吾( Role: Joint author)

    CQ出版  1997.8  ( ISBN:4789836797

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MISC

  • メディア工学の研究動向 Reviewed

    村松正吾, 渡邊修, 奥田正浩, 青木義満, 伊藤康, 東海彰吾

    映像情報メディア学会誌   79 ( 1 )   56 - 66   2024.1

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  • Recent Researches on Media Engineering

    村松正吾, 渡邊修, 奥田正浩, 青木義満, 伊藤康一, 東海彰吾

    映像情報メディア学会誌   78 ( 1 )   2024

  • MATLAB実機開発 第2部 テスト駆動開発 第3章 Simulinkで各機能を組み込んで曲線認識システムを完成させる

    高橋勇希, 村松正吾

    インターフェース   48 ( 9 )   2022

  • MATLAB実機開発 第2部 テスト駆動開発 第2章 先にテスト用プログラムを作る「テスト駆動開発」

    高橋勇希, 村松正吾

    インターフェース   48 ( 9 )   2022

  • MATLAB実機開発 第2部 テスト駆動開発 第1章 回帰分析とグレー化処理で学ぶ使い方

    高橋勇希, 村松正吾

    インターフェース   48 ( 9 )   2022

  • Report on the Special Event "System and Signal Processing Subsociety Project: Panel Discussion" (June 2020, at the Joint Meeting of 4 Research Groups)

    IEICE ESS Fundamentals Review   14 ( 4 )   347 - 348   2021.4

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    DOI: 10.1587/essfr.14.4_347

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  • ICASSP 2019 Report

    村松 正吾

    映像情報メディア学会誌 = The journal of the Institute of Image Information and Television Engineers   73 ( 5 )   909 - 914   2019.9

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  • 河川防災とデータ駆動科学の融合

    村松 正吾

    新潟大学第5回U-goサロン   2018.12

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  • Let's go to IEICE Workshops!:Signal Processing (SIP)

    MURAMATSU Shogo

    IEICE ESS FUNDAMENTALS REVIEW   12 ( 1 )   71b - 72   2018

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  • International Conference Report:The 32nd International Technical Conference on Circuits/Systems, Computers and Communications

    MURAMATSU Shogo

    Fundamentals Review   11 ( 2 )   121 - 122   2017

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    DOI: 10.1587/essfr.11.2_121

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  • 20cm以下の床下をらくらく点検! Piカメラ偵察ローバ

    MURAMATSU Shogo

    トランジスタ技術   53 ( 12 )   49 - 66   2016.12

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  • ICASSP 2014 Report

    Muramatsu Shogo

    The journal of the Institute of Image Information and Television Engineers   68 ( 9 )   739 - 744   2014.9

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    今年5月,イタリアのフィレンツェにて開催された国際会議ICASSP2014について報告する.同会議は,IEEE Signal Processing Societyがフラグシップ会議として毎年主催する信号処理に関する世界最大級の国際会議である.今年で第39回目を向かえ,3,500件を超える投稿数を記録した.このうち,1,755件の論文が採択され発表の場を与えられた.

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  • Niigata Report

    MURAMATSU Shogo, MAEDA Yoshinobu, NAKANO Keisuke

    Fundamentals Review   7 ( 3 )   290 - 291   2014

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  • Video processing system development via MATLAB

    Shogo Muramatsu

    Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers   65 ( 11 )   1571 - 1574   2011

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  • P-14 Good Practice for Education "Departure from Superficial Learning":: Case in Electrical and Electronic Engineering Design Education

    OHDAIRA Yasuo, MURAMATSU Shougo, SHINBO Kazunari, FUKUI Satoshi, SUZUKI Takamasa

    Proceedings of Annual Conference of Japanese Society for Engineering Education   2010 ( 0 )   684 - 685   2010

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    DOI: 10.20549/jseejaarc.2010.0_684

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  • (24) Unit Testing on MATLAB

    Shogo Muramatsu

    Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers   63 ( 6 )   777 - 779   2009.9

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  • C言語による情報理論入門, 久保田一, 大石邦夫, 福本昌弘(共著), "C言語による情報理論入門", コロナ社, 2007-06, A5判, 定価(2,500円+税)

    村松 正吾

    電子情報通信学会誌   91 ( 1 )   76 - 76   2008.1

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  • MATLABでオブジェクト指向プログラミング (特集 標準の記法を使って仕様をもむ,バグを出す,コードを作る 組み込みシステム開発に"損して得とる"モデリング)

    村松 正吾

    インタ-フェ-ス   33 ( 10 )   66 - 70   2007.10

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  • コンピュータ・シミュレーションやデータ解析の結果をビジュアルに概観 ここから始めるモデリング《MATLAB編》 (特集 標準の記法を使って仕様をもむ,バグを出す,コードを作る 組み込みシステム開発に"損して得とる"モデリング)

    村松 正吾

    インタ-フェ-ス   33 ( 10 )   52 - 65   2007.10

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  • IWAIT 2006

    MURAMATSU Shogo

    ITEJ   60 ( 4 )   530 - 530   2006.4

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    DOI: 10.3169/itej.60.530

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Presentations

  • Sparsity-Aware High-Dimensional Data Restoration with Convolutional Dictionary Learning Invited

    Shogo Muramatsu

    IEEE/IEIE ICCE-Asia 2020  2020.11 

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  • 畳み込みネットワークによる高次元信号復元と異分野融合への展開 ~ スパースモデリングと畳み込み辞書学習 ~ Invited

    村松正吾

    映像情報メディア学会メディア工学研究会  2020.5 

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    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  • Image Restoration with Convolutional Dictionary Learning Invited

    Shogo MURAMATSU

    2019.12 

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  • データ駆動型動力学モデリングにおける分析・合成シ ス テム - 河川モニタリングへの応用 - Invited

    村松正吾

    IEEE AP-S Tokyo Chapter 特別講演  2024.1 

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  • 計測信号解析のための局所構造化辞書学習 Invited

    村松正吾

    情報計測オンラインセミナー  2022.10 

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  • Development of Cyber-Physical System (CPS) for Active Control of River Channels

    Shogo Muramatsu

    APSIPA Winter School 2021  2021.12 

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  • Development of a Cyber-Physical System for Active Control of River Channels Invited

    Shogo Muramatsu

    Technical Meeting, IEEE Sapporo Section  2021.9 

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  • Sparsity-Aware Image and Volumetric Data Restoration with Convolutional Dictionary Learning

    Shogo MURAMATSU

    APSIPA Summer School 2020  2020.12 

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  • システムと信号処理サブソサイエティの役割 ~ オンラインビデオ会議の Pros & Cons ~

    村松正吾, 高井重昌, 髙島康裕, 林 和則, 福田大輔

    電子情報通信学会CAS, VLD, SIP, MSS合同研究会  2020.6 

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  • 全変動正則化によるマイクロ波レーダ河川観測画像列の逐次復元の検討

    岡本充生, 大原由暉, 安田浩保, 早坂圭司, 小野峻佑, 村松正吾

    映像情報メディア学会メディア工学研究会(サマーセミナー2024)  2024.8 

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  • 2タプル配列に対する回転l1ノルムによるl2ノルム近似のRTL設計

    阿部 周, 村松正吾

    映像情報メディア学会メディア工学研究会(サマーセミナー2024)  2024.8 

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  • ボリュームデータ処理のための3方向局所構造化ユニタリネットワーク

    丸山未夢, ヤサス ゴダゲ, 村松正吾

    映像情報メディア学会メディア工学研究会  2024.6 

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    Event date: 2024.6

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  • 時間遅延グラフ動的モード分解による河道網水位分布予測の検討

    伊藤隆人, 内藤翼, 北村帆高, 安田浩保, 永原正章, 村松正吾

    2024年電子情報通信学会総合大会  2024.3 

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    Event date: 2024.3

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  • Leveraging Locally-structured Unitary Networks for Modeling Non-linear Autonomous Dynamical Systems

    Yasas Godage, Hayato Obara, Yu Otake, Masaaki Nagahara, Shogo Muramatsu

    2024 IEICE General Conference  2024.3 

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    Event date: 2024.3

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  • Flow-Path Fitting Simulation with Gaussian Process Regression for River Health Assessment

    Phonepaserth Sisaykeo, Yuki Takahashi, Hiroyasu Yasuda, Kiyoshi Hayasaka, Shogo Muramatsu

    2024 IEICE General Conference  2024.3 

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    Event date: 2024.3

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  • データ駆動型動力学モデリングによる 河川水位時系列データ解析の検討

    内藤翼, 北村帆高, 村松正吾, 安田浩保

    電子情報通信学会総合大会 

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    Event date: 2023.3

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  • 有向グラフ信号に対する実フィルタ設計に関する検討

    村松正吾, 北村帆高, 安田浩保, 田中雄一

    電子情報通信学会信号処理研究会 

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    Event date: 2023.2 - 2023.3

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  • ループ展開ISTAによる低ビット画像復元

    阿部 周, 高橋颯志, 村松正吾

    電子情報通信学会信号処理研究会 

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    Event date: 2023.2 - 2023.3

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  • 畳み込み合成辞書を利用したGMC正則化画像復元の検討

    REN Shiyi, 山本 雅偉, 村松 正吾

    第37回信号処理シンポジウム  2022.12 

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  • 有向グラフ信号処理のためのグラフフーリエ変換の一般化

    村松 正吾, 北村 帆高, 田中 雄一

    第37回信号処理シンポジウム  2022.12 

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  • 制御付きグラフ動的モード分解による河川水位分布予測

    北村 帆高, 村松 正吾, 安田 浩保, 早坂 圭司

    第37回信号処理シンポジウム  2022.12 

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  • On OCT Volume Data Restoration by Introducing Inter-scale Thresholding

    柿原正紀, 村松正吾

    映像情報メディア学会技術報告  2022.7 

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  • Prediction of River Water Level Distribution by Graph Dynamic Mode Decomposition with Elevation Difference

    北村帆高, 新井裕介, 村松正吾, 安田浩保, 早坂圭司, 大竹雄

    電子情報通信学会大会講演論文集(CD-ROM)  2022.3 

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  • SAR IMAGE RESTORATION WITH COMPLEX ABSOLUTE APPROXIMATION

    ZHANG Zuxuan, 児玉侑也, 村松正吾, 山田寛喜

    電子情報通信学会大会講演論文集(CD-ROM)  2022.3 

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  • River health assessment method with Fourier basis for river flow path control CPS

    高橋勇希, 安田浩保, 早坂圭司, 大竹雄, 村松正吾

    電子情報通信学会大会講演論文集(CD-ROM)  2022.3 

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  • Design of Structured Convolutional Dictionary by Manifold Optimization for Image Restoration

    高橋颯志, 村松正吾

    電子情報通信学会技術研究報告(Web)  2022.8 

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  • Report on the Special Event "System and Signal Processing Subsociety Project: Panel Discussion" (June 2020, at the Joint Meeting of 4 Research Groups)

    IEICE ESS Fundamentals Review  2021.4  Institute of Electronics, Information and Communications Engineers (IEICE)

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  • PROOF OF CONCEPT FOR RIVER MONITORING USING X-BNAD RADAR

    茂木大知, 大原由暉, 室永武司, 西村雄喬, 有澤良佑, 前野仁, 早坂圭司, 村松正吾, 安田浩保

    河川技術論文集(Web)  2021 

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  • PROTOTYPE CONSTRUCTION OF ACTIVE RIVER CHANNEL CONTROL SYSTEM

    ZHANG Chen, 内藤勇鷹, 村松正吾, 安田浩保, 早坂圭司, 大竹雄

    電子情報通信学会大会講演論文集(CD-ROM)  2021 

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  • Accleration of Dictionary Learning by Non-Separable Oversampled Lapped Transform for Image Restoration

    高橋颯志, 村松正吾

    映像情報メディア学会技術報告  2021 

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  • 河道能動制御CPSのプロトタイプ構築のための流路健全性指標の検討

    井上大輝, CHEN Zhang, LIU Dongqi, 村松正吾, 安田浩保, 早坂圭司, 大竹雄

    映像情報メディア学会技術報告  2021 

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  • グラフ動的モード分解による多地点河川水位の解析と予測

    新井裕介, 村松正吾, 安田浩保, 早坂圭司, 大竹 雄

    第35回信号処理シンポジウム  2020.11 

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  • 高次元信号復元のための構造化畳み込み非線形辞書

    小林累輝, 村松正吾

    第35回信号処理シンポジウム  2020.11 

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  • High-dimensional Signal Restoration by Convolutional Networks Driving Fusion Across Multiple Disciplines-Sparse Modeling and Convolutional Dictionary Learning-

    村松正吾

    映像情報メディア学会技術報告  2020 

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  • Optical coherence microscope using high-speed CMOS image sensor for intracochlear vibration imaging

    CHOI Samuel, 村松正吾, 任書晃, 太田岳, 日比野浩

    映像情報メディア学会技術報告  2020 

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  • Fundamental Study on Human Activity Recognition with Millimeter-Wave FM-CW Radar by Using CNN

    坂上史弥, 山田寛喜, 村松正吾

    電子情報通信学会大会講演論文集(CD-ROM)  2020 

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  • 動的モード分解による河川データ分析

    伊郷恭平, 村松正吾, 安田浩保, 早坂圭司, CHEUNG Gene

    電子情報通信学会技術研究報告  2018.8 

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  • DCT-IIを用いた画像拡大処理の対象畳み込みに基づく検討とブロック歪みの削減

    村松正吾

    信学技報  1995 

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  • Graph Signal Processing Application for Enhancing Reliability and Stability of Electrical Power Grid,

    Tuka SADA, Shogo MURAMATSU

    2024 IEEE Shin-etsu Sesession  2024.9 

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  • MATLABでマトまるコラボ ~教育研究を支える情報環境~ Invited

    村松正吾

    京都大学第1回MATLABユーザー交流会  2023.12 

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  • Structured Deep Image Prior with Interscale Thresholding

    Jikai LI, Shogo MURAMATSU

    2022.8 

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  • 畳み込みスパース符号化動的モード分解の多重解像度化とその河床状態推定への応用

    小林 栄裕, 村松 正吾, 安田浩 保, 早坂 圭司

    電子情報通信学会信号処理研究会  2022.8 

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  • Image Classification of Cancer Cells Treated with IRDAptamer

    Rahman Rawnak Mim, Yuuka Yamagata, Yoshiro Chuman, Shogo Muramatsu

    2022.7 

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  • 河川流路変動の解明と制御のためのサイバーフィジカルプロトタイプシステム構築

    内藤勇鷹, 村松正吾, 安田浩保, 早坂圭司, 大竹 雄

    映像情報メディア学会メディア工学研究会(サマーセミナー2020)  2020.9 

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  • 階層型冗長辞書とスケール間依存性を利用したグループスパース画像復元

    坂下和貴, 村松正吾

    映像情報メディア学会メディア工学研究会(サマーセミナー2020)  2020.9 

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  • ミリ波FM-CWレーダを用いたCNNによる人物の動作分類に関する基礎検討

    坂上史弥, 山田寛喜, 村松正吾

    電子情報通信学会宇宙・航行エレクトロニクス研究会 (SANE)  2020.6 

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  • 水制の模型実験による畳み込みスパース符号化動的モード分解の性能評価

    新井裕介, 金子侑平, 村松正吾, 安田浩保, 早坂圭司, 大竹 雄

    電子情報通信学会信号処理研究会  2020.3 

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  • 多波長走査型光コヒーレンス顕微鏡とスパースモデリングによる内耳感覚上皮帯ボリュームデータの3次元画像復元

    CHOI Samuel, 村松正吾, 太田岳, 任書晃, 鈴木孝昌, 日比野浩

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)  2019.9 

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  • レーダー画像復元のための複素ISTA組込み実装

    児玉 侑也, 吉田 祐太, 坂下 和貴, 村松 正吾, 山田 寛喜

    映像情報メディア学会技術報告  2019.8 

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  • OCT Volumetric Data Restoration with 3-D Non-separable Oversampled Lapped Transforms

    吉田 祐太, 藤井 元暉, 村松 正吾, 崔 森悦, 小野 峻佑, 太田 岳, 任 書晃, 日比野 浩

    IEICE technical report  2019.5 

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  • AIによる重症薬疹の早期診断

    藤本篤, 岩井由樹, 阿部理一郎, 村松正吾

    日本皮膚科学会雑誌  2019.5 

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  • 砂州の発生・発達過程における表面流速の計測法の開発

    茂木 大知, 五十嵐 拓実, 安田 浩保, 村松 正吾, 早坂 圭司

    第36回 土木学会関東支部新潟会研究調査発表会  2018.11 

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  • 畳込みスパース符号化を利用した拡張動的モード分解

    村松正吾, 安田浩保, 早坂圭司, 大竹雄, 小野峻佑, 湯川正裕

    第33回信号処理シンポジウム  2018.11 

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  • 重複加算/保持法を利用した生成モデルに基づく高次元信号復元処理

    吉田祐太, 藤井元暉, 村松正吾, 崔森悦

    第33回信号処理シンポジウム  2018.11 

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  • 多波長走査型光コヒーレンス顕微鏡を用いた内耳感覚上皮帯振動計

    崔森悦, 任文晃, 太田岳, 佐藤洸平, 村松正吾, 日比野浩

    日本光学会年次学術講演会予稿集  2018.11 

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  • PolSARデータを用いたサポートベクターマシンによる土地分類に関する基礎的検討

    齋藤奈々子, 山田寛喜, 村松正吾, 佐藤亮一, 山口芳雄

    電子情報通信学会信越支部大会  2018.9 

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  • 車載ミリ波SARイメージングにおけるドップラシフトの影響に関する検討

    小林拓光, 山田寛喜, 村松正吾, 山口芳雄

    電子情報通信学会信越支部大会  2018.9 

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  • 車載ミリ波SARイメージングにおけるSIMOレーダを用いた虚像抑圧に関する検討

    大島彬, 山田寛喜, 山口芳雄, 村松正吾

    電子情報通信学会信越支部大会  2018.9 

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  • 動的モード分解による河川状態のデータ駆動モデリング

    金子侑平, 安田浩保, 早坂圭司, 村松正吾

    電子情報通信学会ソサイエティ大会  2018.9 

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  • Experiment on OCT Volumetric Data Restoration via Hierarchical Sparsity and Hard Constraint

    藤井 元暉, 村松 正吾, 崔 森悦, 小野 峻佑, 太田 岳, 任 書晃, 日比野 浩

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  2018.8 

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  • On Structural Constraint for Convolutional Layers in CNN

    栢森 翔太, 村松 正吾

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  2018.8 

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  • Acceleration of Non-separable Oversampled Lapped Transforms for Embedded Vision

    吉田 祐太, 村松 正吾

    映像情報メディア学会技術報告 = ITE technical report  2018.8 

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  • 伝統的工芸品のBRDF圧縮センシング

    栢森翔太, 中野永人, 長山知司, 村松正吾, 阿部淑人

    2018年電子情報通信学会総合大会  2018.3 

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  • ポスター講演 複素非分離冗長重複変換を用いた超解像の検討

    長山知司, 村松正吾, 山田寛喜

    電子情報通信学会信号処理研究会  2018.3 

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  • カラー画像処理のための重複加算法による非分離冗長重複変換の組込み実装

    吉田祐太, 今井啓太, 村松正吾

    2018年電子情報通信学会総合大会  2018.3 

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  • DCGANを利用した伝統的工芸品のテクスチャ合成

    栢森翔太, 大竹加廉, 村松正吾, 阿部淑人

    2018年電子情報通信学会総合大会  2018.3 

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  • デジタルシネマの復号映像の主観品質の改善

    村田 悠, 村松正吾, 佐々木重信, 菊池久和

    第4回 明日を拓く高度情報通信シンポジウム  2017.12 

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  • 河床状態推定のための水面観測モデルの検討

    安康, 村松 正吾, 安田 浩保, 早坂 圭司

    電気学会東京支部新潟支所大会  2017.11 

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  • 交互砂州発達過程における2 次元浅水流モデルの適用性

    齋藤選, 五十嵐拓実, 安田浩保, 早坂圭司, 村松正吾

    第35回 土木学会関東支部新潟会 研究調査発表会  2017.11 

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  • 平成29年九州北部豪雨における群発表層崩壊の発生要因

    齋藤選, 五十嵐拓実, 安田浩保, 早坂圭司, 村松正吾

    第35回 土木学会関東支部新潟会 研究調査発表会  2017.11 

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  • 非負制約を利用した en-face OCTボリュームデータ信号復元

    村松正吾, 崔森悦, 小野峻佑, 伊藤迅平, 太田岳, 任書晃, 日比野浩

    第32回信号処理シンポジウム  2017.11 

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  • スパース表現による河床状態推定の検討

    伊郷恭平, 村松正吾, 安田浩保, 早坂圭司

    電子情報通信学会信越支部大会  2017.10 

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  • Study on Simple Imaging by Squint-mode SAR with Millimeter Wave Automotive Radar

    小林 拓光, 山田 寛喜, 村松 正吾, 杉山 裕一, 山口 芳雄

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  2017.8 

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  • Divergence Similarity for Color Images and Its Subjective Assessment

    村山 瑞貴, 村松 正吾, 菊池 久和

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  2017.6 

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  • Radar Image Denoising based on Iterative Shrinkage with Complex Nonseparable Oversampled Lapped Transforms

    長山 知司, 村松 正吾, 山田 寛喜, 杉山 裕一

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  2017.6 

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  • Learning Rate Control of Nonseparable Oversampled Lapped Transform Design by Stochastic Gradient Descent

    藤井 元暉, 村松 正吾

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  2017.5 

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  • Poster Presentation : On Radar Image Denoising with Complex Nonseparable Oversampled Lapped Transforms

    長山 知司, 村松 正吾, 山田 寛喜, 杉山 裕一

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  2017.3 

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  • 転移学習による鎚起銅器テクスチャの合成パラメータ推定

    栢森翔太, 村松正吾, 阿部淑人

    電子情報通信学会総合大会  2017.3 

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  • Source Estimation of en-face OCT by Sparse Signal Modeling

    川村 拓海, 伊藤 迅平, 村松 正吾, 崔 森悦

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  2017.1 

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  • パラメータ最適化によるen-face OCTの観測過程推定

    伊藤 迅平, 村松 正吾, 崔 森悦

    第31回信号処理シンポジウム  2016.11 

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  • en-face OCTの観測過程推定に関する検討

    伊藤 迅平, 川村 拓海, 村松 正吾, 崔 森悦

    電子情報通信学会信越支部大会  2016.10 

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  • 板金検査システムのためのランダムドット画像によるピンホールカメラPSF推定

    王 波, 村松 正吾

    電子情報通信学会信越支部大会  2016.10 

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  • 重複加算法による非分離冗長重複変換の組み込み実装

    今井 啓太, 村松 正吾

    電子情報通信学会信越支部大会  2016.10 

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  • 畳込みニューラルネットを用いた鎚起銅器テクスチャ画像の分類

    栢森 翔太, 村松 正吾, 阿部 淑人

    電子情報通信学会信越支部大会  2016.10 

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  • Poster Presentation : A Design Method of Complex Nonseparable Oversampled Lapped Transform

    長山 知司, 村松 正吾

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  2016.8 

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  • 非分離冗長重複変換のHW/SW協調設計

    情野健太, 村松 正吾

    STARCフォーラム2015  2015.11 

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  • 非分離冗長重複変換の事例学習設計における効果的辞書更新

    村松 正吾, 石井 雅基

    第30回信号処理シンポジウム  2015.11 

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  • ピンホールカメラを用いた平板金属加工検査システムのための学習辞書による画像ボケ除去

    押木 友裕, 村松 正吾, 鈴木 孝昌, 村田 光由, 追立 俊朗

    第30回信号処理シンポジウム  2015.11 

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  • 多次元非分離冗長重複変換のFFT領域並列高速化

    堀内 洸汰, 村松 正吾

    第30回信号処理シンポジウム  2015.11 

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  • 学習辞書による鎚起銅器テクスチャの超解像に関する検討

    石井 雅基, 陳 智雨, 村松 正吾, 阿部 淑人

    第20回映像メディア処理シンポジウム  2015.11 

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  • 周波数領域実装による非分離冗長重複変換の並列高速化

    堀内洸汰, 村松正吾

    電子情報通信学会信越支部大会  2015.10 

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  • ピンホールカメラを用いた平板金属加工検査システムとボケ除去に関する検討

    押木友裕, 村松正吾, 鈴木孝昌, 村田光由, 追立俊朗

    電子情報通信学会信越支部大会  2015.10 

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  • 部分的間引き非分離冗長重複変換によるOCTデータノイズ除去

    川村拓海, 村松正吾, 崔森悦

    電子情報通信学会信越支部大会  2015.10 

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  • 非分離冗長重複変換の事例学習における目的関数勾配利用の検討

    石井雅基, 村松正吾

    電子情報通信学会信越支部大会  2015.10 

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  • On Application of NSOLT to 3-D OCT Data Denoising

    川村 拓海, 若杉 翔, 陳 智雨, 村松正吾, 崔 森悦

    電子情報通信学会信号処理研究会  2015.5 

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  • Poster Presentation : Computational Precision in HW/SW Co-implementation of Non-separable Oversampled Lapped Transforms

    SEINO Kenta, FURUYA Kosuke, MURAMATSU Shogo

    IEICE technical report. Signal processing  2015.3 

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    This work proposes an embedded implementation architecture of Non-separable Oversampled Lapped Transform (NSOLT) and investigates its computational precision. NSOLT satisfies the non-separable, real-valued, overlapping and compact-support property. Since the redundancy can be set to an arbitrary rational value, high performance image processing can be realized while saving memory consumption. However, NSOLT has a problem in the processing speed because of the amount of computations. It is expected to accelerate the processing speed by the HW implementation. This report proposes a HW/SW Co-implementation model of NSOLT. In addition, the bit width of integer and fractional parts are investigated to determine the optimal computational precision in the fixed-point operations.

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  • Poster Presentation : MSIST-based Image Restoration with Non-separable Oversampled Lapped Transforms

    WAKASUGI Sho, MURAMATSU Shogo

    IEICE technical report. Signal processing  2015.3 

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    This work proposes, an image restoration technique with modified subbsnd-adaptive iterative shrinkage thresholding (MSIST) and (2-D) non-separable oversampled lapped transforms (NSOLTs). An NSOLT is a lattice-structure-based redundant transform which satisfies the symmetric, real-valued and compact-support property, and capable to have rational redundancy. MSIST is an image restoration algorithm which sets a threshold for each subband independently, and allows the subband adaptive processing. In this study, the performance of the proposed method for deblurring, super-resolution and image inpainting is evaluated. It is verified that NSOLT with MSIST yields superior restoration performance to undecimated Haar transform with MSIST and NSOLT with ISTA in both of PSNR and SSIM.

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  • Image Fusion with Multiple Directional LOTs

    陳智雨, 村松正吾

    第29回信号処理シンポジウム  2014.11 

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  • ボリュームデータスパース表現のための三次元非分離冗長重複変換

    村松正吾, 古屋幸祐, 結城尚貴

    第29回信号処理シンポジウム  2014.11 

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  • 画像処理を利用した抗菌検査効果判定法

    山田孝太郎, 村松正吾, 幸田知華, 山内健, 坪川紀夫, 皆川真人

    電子情報通信学会信越支部大会  2014.10 

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  • 事例学習による非分離冗長重複変換を利用した画像ノイズ除去

    金昌吉, 村松正吾

    電子情報通信学会信越支部大会  2014.10 

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  • Structured Dictionary Learning Based on Face Images with 2-D Non-Separable Oversampled Lapped Transform

    結城 尚貴, 金 昌吉, 村松 正吾

    ITE Technical Report  2014.8 

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    本稿では,非分離冗長重複変換(NSOLT)を利用し,顔画像に基づいた構造化辞書学習を提案する.NSOLTはラティス構成に基づく変換であり,対称性・重複性を有する水平垂直非可分な要素画像(アトム)を有する.また,パーセバルタイトフレーム制約を構造的に課すことができる上,任意の有理数倍の冗長度を選択できる.本稿では,NSOLTを構造的制約とする構造化辞書学習により辞書を設計し,任意の顔画像に対して復元性能の高い辞書を設計する.また,提案法と非間引きHaar変換との顔画像復元性能を比較することで,提案辞書の性能を評価する.

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  • Implementation of Non-separable Oversampled Lapped Transforms for Embedded Vision

    古屋 幸祐, 情野 健太, 村松 正吾

    ITE Technical Report  2014.8 

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    本報告では,筆者らが提案している非分離冗長重複変換(NSOLT)の組込み実装について提案する.組込みビジョン技術の普及に伴い,車載カメラなどに用いられている組込みシステムは高性能化が望まれている.システムの性能向上の手段として,画像変換技術の高性能化が挙げられる.既存の画像変換技術として用いられている離散コサイン変換(DCT)や離散ウェーブレット変換(DWT)は,いずれも可分離処理であるため,性能向上に限界がある.そこで筆者らは,NSOLTを提案した.NSOLTは,非分離変換であり,斜め方向のテクスチャに対応できる.本報告では,NSOLTを組込みビジョン技術へ対応させるため,NSOLTの組込み実装について検討する.処理時間を測定することで,実装モデルの評価を行う.

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  • D-11-35 Study on Sheet-Metal Inspection System Using A Multi-Camera Array

    Chen Yangchao, Terasawa Norihisa, Muramatsu Shogo, Suzuki Takamasa, Oitate Toshiro

    Proceedings of the IEICE General Conference  2014.3 

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  • A-4-23 Heuristic Shrinkage Image Denoising with Non-separable Oversampled Lapped Transform

    Wakasugi Sho, Aizawa Natsuki, Muramatsu Shogo

    Proceedings of the IEICE General Conference  2014.3 

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  • A-4-25 HW/SW Co-Design of Non-separable Oversampled Lapped Transform

    Seino Kenta, Furuya Kosuke, Hara Shintaro, Muramatsu Shogo

    Proceedings of the IEICE General Conference  2014.3 

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  • D-11-34 Scale Correction in Sheet-Metal Inspection System with Digital Camera

    Oshiki Tomohiro, Terasawa Norihisa, Muramatsu Shogo, Suzuki Takamasa, Oitate Toshiro

    Proceedings of the IEICE General Conference  2014.3 

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  • クラス判別のための部分和による境界演算

    渡辺秀典, 村松正吾

    第28回信号処理シンポジウム  2013.11 

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  • Embedded Implementation Model of Non-separable Symmetric Lapped Transforms

    古屋 幸祐, 原 伸太郎, 渡辺 秀典, 村松 正吾

    第28回信号処理シンポジウム  2013.11 

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  • Anscombe 変換に基づく混成DirLOTを利用したポアソンノイズ除去

    陳 智雨, 村松 正吾

    第28回信号処理シンポジウム  2013.11 

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  • プロジェクトの企画運営における多角的視点と工学以外の知識の役割

    谷口諒太郎, 島田泰奨, 村松正吾, 佐々木重信, 原伸太郎

    日本工業教育協会年次大会  2013.8 

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  • 非分離冗長重複変換による高圧縮JPEG/JPEG2000画像の復元(若葉研究者の集い6,サマーセミナー2013〜画像処理の理論と実際〜)

    稲田 岳, 相澤 夏希, 村松 正吾

    映情学技報  2013.8 

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    本報告では,先に筆者らが提案した指向性を持つ非分離冗長重複変換(NSOLT)による高圧縮JPEG/JPEG2000画像の復元法を提案する.NSOLTは非分離処理であり,指向性を有するほか,2倍以下の有理数の冗長度を持つことができる.これまでに変換と繰返し縮退/閾値処理アルゴリズム(ISTA)を用いた画像復元法が高い性能を示すことを確認している.本稿ではJPEG/JPEG2000の劣化過程を線形システムでモデル化し,従来の枠組みで画像復元を行い,性能を評価する.

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  • Embedded Implementation of 2-D Nonseparable Linear-Phase Paraunitary Filter Bank with Multi-Level Tree Structure

    古屋 幸祐, 原 伸太郎, 村松 正吾

    回路とシステムワークショップ論文集 Workshop on Circuits and Systems  2013.7 

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  • ワンショットデジタルカメラを利用した平板金属検査システムにおける操作性向上の研究

    結城尚貴, 村松正吾, 鈴木考昌, 渡辺秀典, 寺澤憲久, 姚海, 追立俊明

    第19回画像センシングシンポジウム(SSII2013)  2013.6 

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  • Image Restoration with Directional Non-separable Oversampled Lapped Transform

    AIZAWA Natsuki, MURAMATSU Shogo

    IEICE technical report. Signal processing  2013.3 

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    This report proposes an image restoration technique with directional non-separable oversampled lapped transform (NSOLT)that the authors suggested as a previous work. NSOLT is a non-separable transform, able to possess a directional property, and capable to have rational redundancy less than two. In this report, the proposed transform is applied to deblurring, super-resolution and inpainting, and the performance is evaluated. The image restoration performance is compared with that of the redundant Haar transform as another redundant system. From simulation results, it is verified that the proposed method not only yields visually preferable results, but also shows high performance in terms of objective criteria, PSNR and SSIM.

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  • Motion-Compensated Temporal Filtering for Remote Control of Microscope

    TUERXUN Aishan, CHEN Zhiyu, MURAMATSU Shogo

    ITE Technical Report  2013.2 

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    In order to realize an efficient remote control of microscope for medicine, a lossless/lossy image sequence codec system is proposed by adopting motion-compensated temporal filtering (MCTF) and Motion JPEG2000. The proposed system exploits information of translation command as a motion vector given from the remote operator for searching a region of interest, and applies a global motion-compensation (GMC) to even frames. The GMC frames are used to predict odd frames in the temporal lifting structure and the difference is transmitted as an enhancement layer. In the static case, the base layer consisting of even frames and enhancement layer consisting of the difference are completely used to realize the lossless decode. On the other hand, when searching a region of interest, only the base layer is employed so that lossy decoding is realized for reducing the transmission cost. As a result, the usability is improved. In this report, the basic structure is investigated and verified the significance of the scalability function according to the static and dynamic operation case.

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  • Kinect-Based Gesture Recognition for Metal Sheet Inspection System

    YAO Hai, TERASAWA Norihisa, MURAMATSU Shogo, SUZUKI Takamasa, OITATE Toshiro

    ITE Technical Report  2013.2 

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    A metal sheet inspection system with Kinect is introduced in this work. The current sheet metal inspection system which the authors have proposed consists of an inspecting table and operation terminal. Since the table and terminal are separately installed, it is obliged to useless operations. In order to solve this problem, it is proposed to introduce a gesture recognition function of the Kinect sensor and improve the usability. A depth image is acquired by using Kinect, and then a fundamental gesture recognition is realized by using the OpenNI function. The fundamental gestures are considered to be adopted to the inspection operation terminal and the gesture operation on the inspecting table is discussed.

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  • 6-217 Role of Various Viewpoints and Knowledge Away from Engineering in a Project Management

    TANIGUCHI Ryotaro, SHIMADA Taisuke, HARA Shintaro, MURAMATSU Shogo, SASAKI Shigenobu

    Proceedings of Annual Conference of JSEE  2013 

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  • A Lattice Structure for 2-D Non-Separable Discrete Symmetric Tight Frames

    村松 正吾, 相澤 夏希

    信号処理シンポジウム講演論文集  2012.11 

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  • Tree Structure and Embedded Implementation of Directional Lapped Orthogonal Transforms

    原 伸太郎, 古屋 幸祐, 村松 正吾

    信号処理シンポジウム講演論文集  2012.11 

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  • A Study on Color Similarity between Digital Images

    片岡 智, 菊池 久和, 村松 正吾

    信号処理シンポジウム講演論文集  2012.11 

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  • カラー画像の類似性計量について

    片岡 智, 菊池 久和, 村松 正吾, ヘイッキ・フットネン

    2012年度画像符号化シンポジウム  2012.10 

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  • 透過型平板金属加工検査システムのためのレンズ歪補正に関する検討(若葉研究者の集い2,サマーセミナー2012〜高精細化時代のビジョン技術〜)

    寺澤 憲久, 北澤 伸哉, 渡辺 秀典, 村松 正吾, 鈴木 孝昌, 村田 光由, 追立 俊朗

    映情学技報  2012.8 

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    本研究では,デジタルカメラを用いた高精度且つ低コストな板金検査システムを提案する.提案検査システムは単一のデジタルカメラにより板金の画像を取得し,設計データと比較することで板金の加工誤差を検出する.デジタルカメラにより取得した画像はレンズ歪を有するため,高精度検査システムの実現にはレンズ歪の推定及び補正が必要となる.また,台座の高さや板金の厚みによるズレも考慮する必要がある.本研究では半径歪モデルと位相限定相関法を組み合わせた歪推定,局所的射影変換を用いた歪補正及び高さ・厚み補正の方法を提案する.実験により提案検査システムの検査精度を評価し,精度0.5mmの達成を確認する.

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  • Filtering, Transform and Sparse Representation of Images Invited

    村松 正吾

    回路とシステムワークショップ論文集 Workshop on Circuits and Systems  2012.7 

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  • ISTA-Based Image Restoration with Multiple DirLOTs

    相澤 夏希, 村松 正吾, 湯川 正裕

    回路とシステムワークショップ論文集 Workshop on Circuits and Systems  2012.7 

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  • Hardware Model of Two-Dimensional Non-separable GenLOT for Video Processing

    HARA Shintaro, OTA Yuya, MURAMATSU Shogo

    IEICE technical report. Signal processing  2012.3 

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    In this report, a hardware model of two-dimensional non-separable GenLOT for video processing and a permutation module for wavelet structure are proposed. Existing transforms such as the discrete cosine trnsform (DCT) and discrete wavelet transform (DWT) are not suitable for the expression of diagonal edges or textures because these transforms are separable. The directional GenLOT proposed in this laboratory is suitable for the expression because it is non-separable. However, there is a problem of the processing speed in the directional GenLOT. It is expected that the specific hardware is effective to solve this problem. Therefore, the authors proposed a hardware model of two-dimensional non-separable GenLOT, where the model is designed for a still image processing. This study suggests to extend the hardware model to video processing of two-dimensional non-separable GenLOT by the modifying the preceding model. In addition, a module for wavelet structure is also proposed. Finally, a part of the model is described by VHDL, and the speed and area are evaluated in order to show the significance of the proposed architecture.

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  • Geometrical Distortion Estimation and Compensation for High Precision Metal Sheet Inspection System with Digital Still Camera

    KITAZAWA Shinya, WASHIZU Toru, WATANABE Hidenori, SATO Kotaro, TERASAWA Norihisa, HIROSAWA Akira, MURAMATSU Shogo, SUZUKI Takamasa, MURATA Mitsuyoshi, OITATE Toshiro

    IEICE technical report. Signal processing  2012.3 

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    In this report, a fast and automatic metal sheet inspection system by digital still camera is introduced. This system acquires a metal sheet image with a single digital still camera, inspects the image and detects errors by comparing with the layout data. Since a digital still camera yields particular lens distortions, geometrical undistortion process is required in order to achieve high precision inspection. In this research, it is proposed to combine the camera calibration with a radial distortion model and residual detail variation in order to achieve high precision distortion estimation. After undistortion by the radial distortion model, the detail variation is estimated by phase only correlation(POC). Futhermore, errors resulted from thickness of metal sheet is also compensated simultaneously. In order to confirm the significance of this inspection system, the accuracy is evaluated.

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  • Image Restoration with Union of Multiple DirLOTs

    AIZAWA Natsuki, MURAMATSU Shogo

    IEICE technical report. Signal processing  2012.3 

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    In this report, an image restoration method by using Directional Lapped Orthonormal Transform (DirLOT), which the authors proposed previously, is investigated. The transform has an advantage in representing diagonal edges and textures in images because it is nonseparable processing and has directional property. This study, suggests to construct a redundant dictionary which has multiple directional property by using multiple directional symmetric orthonormal wavelet transform(DirSOWT). The multiple directional property is suitable for representing a natural picture containing diagonal geometrical structures. The dictionary is applied to image restoration and the performance is evaluated. In order to show the significance of the proposed method, the performance is also compared with the image restoration results through non-subsampled Haar transform. It is confirmed that the proposed method yields perceptually preferable results from experimental results.

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  • 口腔悪性腫瘍における病理診断サポートのための口腔病理画像解析

    田中良祐, 菊池久和, 朔敬, 村松正吾, 湯川正裕, Mustafa M. Sami

    第26回信号処理シンポジウム  2011.11 

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  • 画像処理によるはんだ付け外観検査のための特徴量削減と良否識別

    今井達也, 菊池久和, 村松正吾, 湯川正裕

    第26回信号処理シンポジウム  2011.11 

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  • QuadtreeとSBCを用いた高能率プログレッシブ画像圧縮符号化

    阿部亮介, 菊池久和, 村松正吾, 湯川正裕

    第26回信号処理シンポジウム  2011.11 

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  • A Study on Edge-Aware Local/Global Tone Mapping for High Dynamic Range Compression

    黄正顕, 菊池久和, 村松正吾

    第26回信号処理シンポジウム  2011.11 

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  • 区間計算を用いた混合ガウス分布モデルクラス判別器による誤り訂正出力符号

    渡辺秀典, 村松正吾, 菊池久和, 佐々木重信

    第26回信号処理シンポジウム  2011.11 

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  • 混成指向性重複直交変換を利用した画像ノイズ除去

    韓丹丹, 村松正吾

    第26回信号処理シンポジウム  2011.11 

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  • 位相差顕微鏡映像における歯周病菌の追跡について

    川村陽一, 菊池久和, 村松正吾, 湯川正裕

    第26回信号処理シンポジウム  2011.11 

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  • 混成指向性重複直交変換を利用した画像スパース表現

    武田一樹, 村松正吾

    第26回信号処理シンポジウム  2011.11 

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  • 映像処理のための非分離重複直交変換の組込み実装

    古屋 幸祐, 原 伸太郎, 村松 正吾

    DSPS教育会議  2011.9 

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  • デジタルカメラを利用した透過型板金検査システム

    寺澤 憲久, 北澤 伸哉, 渡辺 秀典, 村松 正吾, 鈴木 孝昌, 村田 光由, 追立 俊朗

    DSPS教育会議  2011.9 

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  • シフト不変二次元非分離GenLOTを用いた平坦領域検出(若葉研究者の集い2,サマーセミナー2011(若葉研究者の集い))

    本田 義文, 村松 正吾, 村田 光由, 追立 俊朗

    映情学技報  2011.8 

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    本研究では,二次のバニッシングモーメントを有するシフト不変二次元非分離GenLOTの平面分離性能を利用し,画像中から平坦な領域を検出する手法を提案する.本手法は,教室における黒板・ホワイトボード領域検出や板金端材の未使用領域検出などの応用が期待される.検出法として,シフト不変二次元非分離GenLOTを用いてエネルギーマップを作成し,このエネルギーマップからマスクを求め,非平坦領域の削除・モルフォロジー処理を行うことで領域分割を行う.Haar DWT,9/7DWTを利用した結果との比較を通して本提案法の有効性を確認する.

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  • 3-6 On Adaptive Basis Switch Coding with 2-D Non-separable GenLOT

    WANG Rui, MURAMATSU Shogo, KIKUCHI Hisakazu

    PROCEEDINGS OF THE ITE ANNUAL CONVENTION  2011.8 

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    This report proposes an adaptive basis switching technique of two-dimensional (2-D) non-separable (NS) GenLOT for picture coding. The conventional DCT and DWTs are separable and have disadvantage in representing diagonal edges and textures of a given picture. In order to overcome the problem, the authors proposed 2-D NS GenLOT as a previous work. In this work, the adaptive local basis control of overlap and direction is investigated and the significance is verified.

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  • SURE-LET Image Denoising Through 2-D Non-separable GenLOT

    HAN Dandan, MURAMATSU Shogo, KIKUCHI Hisakazu

    IEICE technical report  2011.6 

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    This work proposes a denoising technoque with a two-dimensional (2-D) non-separable GenLOT for image denoising. In image denoising, one of the most popular and well known techniques is the soft shrinkage proposed by Donoho and Johnstone. However, the shrinkage function is not flexible since it depends on the universal threshold and the non-linearity makes the optimization complex. In order to mitigate these problems, an orthonormal wavelet thresholding algorithm based on SURE-LET is proposed by Luisier. However, the method still has a disadvantage in representing diagonal geometric structures such as diagonal edges and textures due to the separablity of an adopted transform. In order to solve the problem, this work contributes to apply the 2-D non-separable GenLOT with the trend vanishing moments(TVMs). From some experimental results, it is shown that our proposed method shows better performance for diagonal texture images.

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  • Hardware Implementation of Two-Dimensional Non-separable GenLOT Based on Block Processing and Lifting Scheme

    OTA Yuya, CHOI Saemi, MURAMATSU Shogo, KIKUCHI Hisakazu

    IEICE technical report  2011.6 

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    In this report, a hardware architecture of two-dimensional non-separable GenLOT is proposed based on the block processing and lifting scheme. The discrete cosine transform (DCT) adopted in JPEG and MPEG-2, or the discrete wavelet transform (DWT) used in JPEG2000 are not suitable for the expression of diagonal textures and edges because these transforms are separable. The non-separable GenLOT proposed by the authors is suitable for the expression of diagonal textures and edges because it can take directionality and has block-wise implementation which maintains the orthogonality. However, there is a problem in the process in teams of the computational cost. It is expected that a specific hardware yields effective solution to this problem. Therefore, in this study, it is suggested to realize the two-dimensional non-separable GenLOT on hardware architecture by the block-wise handling and lifting scheme. The circuit module to be implemented on hardware is modeled by VHDL and the speed and area are evaluated from the synthesis reports.

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  • フィルムグレイン再現モデルとディジタルシネマへの適用

    宗形俊, 菊池久和, 村松正吾, 湯川正裕, ヘイッキフットネン

    第25回信号処理シンポジウム  2010.11 

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  • TV Image Denosing and Noise Response Analysis

    Peter Ndajah, Masahiro Yukawa, Shogo Muramatsu, Hisakazu Kikuchi

    25th IEICE Signal Processing Symposium  2010.11 

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  • 区間計算を用いた混合ガウス分布モデルクラス判別器によるAdaboost

    渡辺秀典, 村松正吾, 菊池久和

    第25回信号処理シンポジウム  2010.11 

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  • 指向性GenLOTによる傾斜平面方向検出

    村松正吾, 韓丹丹, 小林智也, 菊池久和

    第25回信号処理シンポジウム  2010.11 

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  • 固定小数点精度におけるHough曲線計算の誤差評価

    鷲津亨, 村松正吾, 菊池久和

    電子情報通信学会信越支部大会  2010.10 

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  • Surface Annihilation Property of Trend Vanishing Moments

    Dandan Han, Tomoya Kobayashi, Shogo Muramatsu, Hisakazu Kikuchi

    電子情報通信学会ソサイエティ大会  2010.9 

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  • RAGアルゴリズムによる混合ガウス分布のための二次形式計算回路の小面積回路実装

    高橋充, 村松正吾, 菊池久和

    DSPS教育者会議  2010.9 

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  • P-14 Good Practice for Education "Departure from Superficial Learning" : Case in Electrical and Electronic Engineering Design Education

    OHDAIRA Yasuo, MURAMATSU Shougo, SHINBO Kazunari, FUKUI Satoshi, SUZUKI Takamasa

    工学・工業教育研究講演会講演論文集  2010.8 

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  • Adaptive Parameter Control and Block-Wise Implementation of Directional GenLOT

    皆川 明樹, 村松 正吾, 小林 智也, 菊池 久和

    ITE Technical Report  2010.8 

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    本研究では,筆者らが先に提案した指向性GenLOTにおける適応的パラメータ制御とブロック処理について述べる.これまで筆者らは,一定の方向を持つ画像に指向性GenLOTを適用することにより符号化性能を示してきた.そこで,今回はフィルタを適応的に切り替えることにより,様々な方向を持つ画像に対する指向性GenLOTの適用を試みる.符号化実験を通して本適応型指向性GenLOTの有効性を確認する.

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  • Relation between Keypoint Detection Ratio and Fixed-Point Word Length in SIFT Algorithm

    Nagumo Koji, Muramatsu Shogo, Kikuchi Hisakazu

    ITE Technical Report  2010.8 

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    本研究では,SIFTアルゴリズムにおけるキーポイントの検出精度と,固定小数点数の演算語長の関係を検証する.小数部の演算語長に24ビットを割り当てることで,誤検出数を2%,検出漏れ数を0.9%に抑えることが出来た.

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  • A Proposal of a Reproduction Model of Film Grain Textures in Decoding of Digital Cinema

    Munekata Shun, Kikuchi Hisakazu, Muramatsu Shogo, Yukawa Masahiro

    ITE Technical Report  2010.8 

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    ディジタルシネマのJPEG2000圧縮符号化に際してビットレートが十分に高くない場合,フィルム映画特有の質感を表わすフィルムグレインテクスチャが喪失する.本稿では,喪失フィルムグレインテクスチャを復号時に再現するためのモデルを提案する.フィルムグレインの統計的特徴にもとづいてモデル化を行い,白色雑音の混合,補間,明度依存画素適応振幅制御によってフィルムグレインテクスチャを再現する.実験的に提案モデルの妥当性を検証する.

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  • Reversible Component Transforms via an Interpretation of the LU Factorization

    KIKUCHI Hisakazu, HWANG Junghyeun, MURAMATSU Shogo

    IEICE technical report  2010.6 

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    A variant to a given irreversible linear transformation is defined based on the LU decomposition of a nonsingular matrix so that the transformation may be computed in a lifting form and may be hence reversible. Round-off errors involved with the lifting computation and the signal excursion are analyzed, and the computational complexity is also given. Some reversible component transforms are presented and experimented to provide helpful information to image compression applications. Discussions are developed with coding gain and actual bit rates.

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  • エアフローのあるダクトにおける能動騒音制御の検討

    吉田隆広, 広田俊介, 藤原武士, 羽田卓史, 菊池久和, 村松正吾

    電子情報通信学会総合大会  2010.3 

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  • Directional Constraints for 2-D Non-separable GenLOT

    KOBAYASHI Tomoya, MURAMATSU Shogo, KIKUCHI Hisakazu

    IEICE technical report. Signal processing  2010.2 

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    This paper proposes the diretional vanishing moment constraints to two-dimentional (2-D) non-separable GenLOT. As a previous work, the authors have proposed a lattice structure of 2-D non-separable filter banks which are orthogonal, symmetric and have overlapping property, and been investigated the directional design. This work newly derives directional constraints for parameter matrices of the lattice structure, which is given by introducing directional derivation to the transfer functions. Some experimental results of texture coding show the significance of the novel constraints.

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  • 指向性GenLOTにおける基底設計とブロック処理

    小林智也, 村松正吾, 菊池久和

    第24回信号処理シンポジウム  2009.11 

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  • 位相差顕微鏡映像における歯周病菌の追跡

    皆川圭, 菊池久和, 村松正吾

    第24回信号処理シンポジウム  2009.11 

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  • 混合ガウス分布モデルのための区間計算に基づくEMアルゴリズム

    渡辺秀典, 村松正吾, 菊池久和

    第24回信号処理シンポジウム  2009.11 

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  • A-4-16 On Directional Design of GenLOT for Picture Coding

    Sano Makoto, Hiki Minoru, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2009.9 

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  • A-4-17 Boundary Operations for Directional GenLOT

    Kobayashi Tomoya, Hiki Minoru, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2009.9 

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  • A-4-18 Fixed-point Design of Directional Interpolation Filter without Checkerboard Effect

    Minagawa Haruki, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2009.9 

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  • A-4-35 Adaptive Spatio-temporal Filtering with Motion/Edge Detecter

    Sato Kazuya, Hiki Minoru, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2009.9 

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  • A-4-39 A Design of an Active Noise Control Unit for a Duct

    Hirota Shunsuke, Yoshida Takahiro, Fujiwara Takeshi, Haneda Takuji, Kikuchi Hisakazu, Muramatsu Shogo

    Proceedings of the Society Conference of IEICE  2009.9 

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  • A-4-7 Error Evaluation of Markov Chain Monte Carlo with Chebyshev Approximation

    Kikuchi Yuji, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2009.9 

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  • A-4-8 Performance Evaluation of Interval Calculation with Fixed Point Arithmetic for GMM-Based Classifier

    Sato Takahiro, Watanabe Hidenori, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2009.9 

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  • A-4-9 GMM-based Classification with Interval Calculation using Multiplierless Refinement Scheme

    Watanabe Hidenori, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2009.9 

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  • A-4-10 Area Reduction of Quadratic Form Calcurator with Modified Distributed Arithmetic

    Nagumo Koji, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2009.9 

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  • グリーンノイズによる印刷向けハーフトーニングに関する研究

    林友之, 菊池久和, 村松正吾

    電子情報通信学会ソサイエティ大会  2009.9 

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  • 修正型分散算術による二次形式計算回路の面積削減

    南雲康次, 村松正吾, 菊池久和

    第11回DSPS教育者会議  2009.9 

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  • 指向性GenLOTにおける境界処理(セッション4,サマーセミナー(若葉研究者の集い))

    小林 智也, 比企 豊, 村松 正吾, 菊池 久和

    映情学技報  2009.8 

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    本研究では,指向性GenLOTにおける境界処理について述べる.JPEGやMPEG-2で採用されている離散コサイン変換(DCT)はブロック歪が発生するという問題がある.JPEG2000では基底画像が重複性を持つ離散ウェーブレット変換(DWT)を採用し,ブロック歪を回避している.これらDCT,DWTは可分離処理のため,画像の斜めエッジに適していない.そこで筆者らは指向性GenLOT/DWTを提案している.この変換は指向性設計が可能で,基底画像が重複性を有するためブロック歪を起こさない.しかしながら,対称拡張による境界処理ができず実際の画像処理への妨げとなっていた.本報告では,ラティス構成のパラメータ制御によって,基底画像の重複性を制御可能であることを示し,指向性GenLOT/DWTにおける境界処理が可能となることを示す.

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  • Effective Features for Defective Soldering Detection by Image Analysis

    SUGIYAMA Kentaro, MIYAGUCHI Tatsuya, KIKUCHI Hisakazu, MURAMATSU Shogo, KOBAYASHI Jun-ichi

    Reports of the Technical Conference of the Institute of Image Electronics Engineers of Japan  2009.7 

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    In the optical soldering inspection systems, the existence or nonexistence of soldering paste and unfirm solder are relatively easy to be detected. However, it is difficult to classify the amount, the shape and the state of the fillet of brazed joints. This study aims at a development of an automatic classification system of solder joints on printed circuit boards and an exploration of effective features for defective soldering detection by means of statistical image analysis of digital images. A number of features are selected from textural features to be tested for the classification into 5 typical classes of solder joints. Experiments have shown that they are effective.

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  • 区間計算を用いた混合ガウス分布モデルに基づくクラス判別のDSP/FPGA実装

    渡辺秀典, 村松正吾, 菊池久和

    第22回回路とシステム軽井沢ワークショップ  2009.4 

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  • Second Vanishing Moment Constraints on 2-D GenLOT and Its Directional Design

    MURAMATSU Shogo, ADACHI Atsuyuki

    ITE Technical Report  2008.12 

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    This work proposes a novel design method of 2-D non-separable linear-phase paraunitary filter banks (LPPUFB). Especially the two-degree vanishing moment constraint is derived for the lattice structure. In the 2 × 2-decomposition case, the authors have already derived the constraint and designed non-separable symmetric orthonormal wavelets with vanishing moments of degree two. This work extends the discussion to more general 2m_y × 2m_x-decomposition case and yields a method to impose the condition to the lattice structure. The constraint is imposed directly on design parameters so that both of the linear-phase and paraunitary property are structurally guaranteed. Since the structure adopted in this work is based on the 2-D separable DCT, 2-D separable GenLOT, a popular lattice structure of DCT-based LPPUFB, is regarded as a special case. The main advantage of non-separable systems is the directional capability. This work allows us to obtain directional non-separable LOT with two-degree vanishing moments. Some design examples are shown to verify the significance of the proposed method.

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  • Directional Adaptive Nonseparable Interpolation Filter for Sub-pixel Motion Compansation

    HIKI Minoru, MURAMATSU Shogo, KIKUCHI Hisakazu

    ITE Technical Report  2008.12 

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    In this work, we evaluate the directional adaptive nonseparable interpolation filter for sub-pixel motion compensation. In the future video coding systems, developing more efficeient interpolation filter for motion compensation is impotant subject to implove coding efficiency. In this work, we develop some nonseparable interpolation filters support different frequency region, and propose a new edge adaptive nonseparable interpolation method altering the filter by edge direction. Simulation for simple edge images and coding experiments for real video are shown.

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  • 画素の復号期待値によるビットモデリングにもとづく汎用ビットプレン符号化

    菊池久和, 船橋邦夫, 村松正吾

    第23回信号処理シンポジウム  2008.11 

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  • 色相変化に着目した高忠実度カラーデモゼイシング

    大野寛仁, 菊池久和, 村松正吾

    第13回映像メディア処理シンポジウム (PCSJ/IMPS)  2008.10 

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  • 動き補償時空間フィルタリングにおける可変係数型可逆デインタレース処理のパラメータ非伝送化

    打田淳, 村松正吾, 菊池久和

    第23回画像符号化シンポジウム (PCSJ/IMPS)  2008.10 

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  • 復号画素値を文脈とするビットプレン符号化 -機能拡充型可逆画像圧縮-

    船橋邦夫, 菊池久和, 村松正吾

    第23回画像符号化シンポジウム (PCSJ/IMPS)  2008.10 

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  • A-4-5 Interval Calculation with Fixed Point Arithmetic for Classification of Gaussian Mixture Models

    Sato Takahiro, Muramatsu Shogo, Watanabe Hidenori, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2008.9 

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  • 混合ガウス分布モデルの区間計算判別回路におけるダイナミックレンジの改善

    渡辺秀典, 村松正吾, 菊池久和

    電子情報通信学会信越支部大会  2008.9 

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  • はんだ付け外観検査装置のための高次局所自己相関特徴を用いたはんだ画像の識別

    宮口竜也, 菊池久和, 村松正吾, 小林淳一

    第10回DSPS教育者会議  2008.9 

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  • デジタルシネマ復号映像におけるフリッカ低減方法

    村田悠, 菊池久和, 村松正吾

    第10回DSPS教育者会議  2008.9 

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  • 区間計算法を用いた混合ガウス分布モデルの判別回路の実装

    渡辺秀典, 村松正吾, 菊池久和

    第10回DSPS教育者会議  2008.9 

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  • 回帰分析を用いた河川監視映像のための河川水位推定

    大倉誠, 村松正吾, 岩橋政宏

    電子情報通信学会信越支部大会  2008.9 

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  • ラティス構成に基づく指向性フィルタバンク設計の検討(サマーセミナー(若葉研究者の集い)「最先端ビジョン技術が拓く画像応用の新境地」)

    安達 充幸, 村松 正吾, 菊池 久和

    映情学技報  2008.8 

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    本研究では,筆者らが既に提案しているラティス構成に基づく多次元直線位相直交フィルタバンクの設計法を用いて,指向性を考慮した二次元直交対称ウェーブレット変換の設計法を検討する.異方性の自己相関関数モデルに対する最適化設計をとおして,2次のバニッシング・モーメントを持つ指向性フィルタバンクの設計を行い,シミュレーションによる性能評価を行う.

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  • Progressive Bitplane Coding for Lossless Image Compression

    FUNAHASHI Kunio, KIKUCHI Hisakazu, MURAMATSU Shogo

    IEICE technical report  2008.6 

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    A lossless compression system for digital images is proposed to equip itself with two functions of progressive transmission and progressive decoding. It is a bitplane coding system and consists of context modeling and adaptive arithmetic coding (actually range coding). Starting from the most significant bitplane, every bitplane is encoded into a separate bit stream to implement progressive transmission. Sequential encoding of bitplanes enables progressive decoding. The context of a target bit is made of two composites. The neigborhood context is modeled by the expectation values of the neighboring pixel values that are available at decoders. The other is the self context that is the MSB of the decode expectation value for the target pixel. The lossless compression performance of the bitplane codec is competitive with that of JPEG-LS. There is no spatial blur even at the earliest level of progressive decoding. The mean square error between the original image and a decoded image at any progression level is known prior to encoding/decoding.

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  • Tracking of Periodontal Bacteria in Phase-Contrast Microscopic Video

    SHIMIZU Keita, KIKUCHI Hisakazu, MURAMATSU Shogo

    IEICE technical report  2008.6 

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    The latest research shows that 80 percents of the Japanese adult are infected by a periodontal disease. The pathological study on live periodontal bacteria has been not yet developed at a sufficient level for finding treatments and preventions against the periodontal disease. It is useful to design an automatic system that analyzes the live bacterial activity and dynamics in the mouth. This study presents an approach for analyzing the bacterial activity on a video sequence acquired by a differential phase microscope. By using a moving object segmentation algorithm, it has been successful to remove the background out of the video sequence and to detect moving bacteria. Bacteria are extracted by labeling connected pixels, and their locations and shapes are identified for tracking moving bacteria. The periodontal bacteria tracking system has been implemented on a digital signal processor (DSP) for real-time processing. The system offers two tracking modes: tracking all individual bacteria and tracking a single specific bacterium.

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  • An LSI architecture of classification module for Gaussian mixture models with interval computations

    武田 竜之介, 村松 正吾, 高橋 祐一郎

    回路とシステム軽井沢ワークショップ論文集  2008.4 

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  • D-16-8 Image Processing for Assisting the Diagnosis of Oral Pathological Images

    Saito Masahisa, Kikuchi Hisakazu, Muramatsu Shogo, Saku Takashi

    Proceedings of the IEICE General Conference  2008.3 

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  • D-12-110 A Classification of Solder Appearance Using Higher-order Local Autocorrelation Features

    Miyaguchi Tatsuya, Kikuchi Hisakazu, Muramatsu Shogo, Kobayashi Jyunichi

    Proceedings of the IEICE General Conference  2008.3 

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  • A-4-20 An Efficient Classification Module Based on Gaussian Mixture Models with Interval Calculation

    Takeda Ryunosuke, Muramatsu Shogo, Watanabe Hidenori, Kikuchi Hisakazu

    Proceedings of the IEICE General Conference  2008.3 

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  • Efficient Classification for Gaussian Mixture Models with Interval Calculation

    MURAMATSU Shogo, WATANABE Tsutomu, WATANABE Hidenori

    IEICE technical report  2008.1 

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    This work proposes an efficient Bayesian decision scheme for Gaussian mixture models (GMM). Statistical pattern classification problems with the Bayesian decision theorem often meet a situation that comparison between posterior probabilities of classes is obvious. In this work, the comparison for GMM is reduced to simple interval calculations. The exponential function is replaced by scaling and multiplication with powers of two, and the decision if teh comparison is obvious and which class is most likely is efficiently calculated. For unclear cases, a refinement process is also proposed, where the computational accuracy is successively refined. In order to verify the significance, experimental results of the application to a skin color classifier are shown. It is shown that the classification for over 99.5% of all observed data was completed without any refinement process, and that the refinement process was able to complete all decision. The proposed method enables us to save redundand exponential operations and is expected for DSP or LSI implementation with low power consumption.

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  • Coefficient parameter reduction of invertible deinterlacing in motion-compensated spatiotemporal filtering

    岡田 敏幸, 村松 正吾, 比企 豊

    ITE technical report  2007.12 

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  • 単板式ディジタルカメラのための高忠実度カラーデモゼイシング

    大野寛仁, 高橋善寿, 村松正吾, 佐々木重信, 菊池久和

    第4回 明日を拓く高度情報通信シンポジウム  2007.12 

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  • デジタルシネマの復号映像の主観品質の改善

    村田 悠, 村松正吾, 佐々木重信, 菊池久和

    第4回 明日を拓く高度情報通信シンポジウム  2007.12 

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  • A Proposal of Directional Interpolation for Digital Halftone Printing

    IIJIMA Akira, KIKUCHI Hisakazu, MURAMATSU Shogo

    IEICE technical report  2007.11 

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    Bilevel halftones are used for printing color digital images. The interpolation of color pixel values prior to digital halftoning is discussed and a new color interpolation scheme is presented by a directional copy of color values in the hue vector space. As the number of data increases due to the interpolation, contouring artifacts are likely to appear because similar values increase in the close vicinity over uniform areas. Error diffusion is incorporated with the clustered-dot ordered dithering to prevent from undesirable contouring. Experimental results demonstrate that sharp interpolation is obtained to produce no visible contouring artifacts.

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  • Design of Non-separable Orthogonal Symmetric Wavelets With a Lattice Structure

    MURAMATSU Shogo, ADACHI Atsuyuki, KIKUCHI Hisakazu

    IEICE technical report  2007.11 

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    In this work, a design method of two-dimensional (2-D) orthogonal symmetric wavelets is proposed by using a lattice structure for multi-dimensional (M-D) linear-phase paraunitary filter banks (LPPUFB), which the authors have proposed before as a previous work. The derivation process for the constraints on the second-order vanishing moment is shown and some design examples obtained through optimization with the constraints are exemplified. In the application to image processing, the directionality of filters is of interest. This report verifies through optimization processes for anisotropic autocorrelated function (acf) model that the vanishing moment constraints significantly influence to the directionality.

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  • 定色相原理に基づく補間方向推定を用いたカラーデモゼイシング

    大野寛仁, 高橋善寿, 菊池久和, 村松正吾

    第22回信号処理シンポジウム  2007.11 

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  • 可変係数型可逆デインタレース処理のパラメータ非伝送化

    打田淳, 村松正吾, 菊池久和

    第22会画像符号化シンポジウム(PCSJ/IMPS)  2007.11 

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  • MCSTFにおける可変係数可逆デインタレース処理のためのパラメータ間引き

    岡田敏幸, 比企豊, 村松正吾, 菊池久和

    電子情報通信学会信越支部大会  2007.9 

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  • 能動騒音制御におけるオンライン推定法の研究

    山崎瞬, 菊池久和, 村松正吾

    電子情報通信学会信越支部大会  2007.9 

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  • Particleフィルタを用いた水面追跡 (メディア工学)

    小林 信介, 村松 正吾, 菊池 久和

    映像情報メディア学会技術報告  2007.8 

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  • Nonseparable DWT based on Lattice Structure for Video Coding

    ADACHI Atsuyuki, HIKI Minoru, MURAMATSU Shogo, KIKUCHI Hisakazu

    Proceedings of the Annual Conference of the Institute of Image Electronics Engineers of Japan  2007.8 

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    In this work, a new design method of linear-phase orthogonal nonseparable discrete wavelet transforms (DWT) with 2 vanishing moments are proposed based on lattice structure as a new tool for video coding. The DWTs used in JPEG2000 are known to yield fluctuation of hazy distortion when applied to motion picture. Our conjecture is that the DWTs do not have the orthogonal property. Since our proposed DWT has the orthogonal property, it is possible to reduce the hazy distortion. Coding experiments for real videos are shown for evaluating the relation between the spatial correlation of the distortion in the reconstructed picture and the orthogonal property of the transform.

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  • Gaussian Mixture Model for River Region Classification

    OHKURA Makoto, MURAMATSU Shogo, KIKUCHI Hisakazu, IWAHASHI Masahiro

    Reports of the Technical Conference of the Institute of Image Electronics Engineers of Japan  2007.8 

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    This report proposes a river region classification using a Gaussian mixture model for feature vectors. The conventional method classifies river region by assuming a single Gaussian distribution. Since this work assumes a Gaussian mixture distribution, better classification performance can be expected because it becomes possible to approximate more complex distributions than any single Gaussian. Experimental results with real surveillance videos are shown for evaluating the performance of the proposed method, and improvement of the performance from the conventional method in term of precision is verified.

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  • 定色相原理を用いた補間方向推定によるカラーデモゼイシング (メディア工学)

    大野 寛仁, 高橋 善寿, 菊池 久和, 村松 正吾

    映像情報メディア学会技術報告  2007.8 

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  • An Application of Fuzzy Reasoning to Image Object Extraction and Recognition

    MIYAGUCHI Tatsuya, TAKAHASHI Yoshihisa, KIKUCHI Hisakazu, MURAMATSU Shogo, KOBAYASHI Jyunichi

    IEICE technical report  2007.7 

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    Fuzzy reasoning is a method to make machines reason by themselves. Fuzzy reasoning gives the degree of likelihood for which an element in issue belongs to the set, whereas the ordinary set theory gives one of two states whether the element belongs to the set. This is referred to as fuzzification. The reasoning is done in accordance with the fuzzy rules denned with the fuzzified values in advance. The output is the defuzzified value of the reasoning result. Becouse of these reasoning processes, fuzzy reasoning is accepted as an easy and effective method for the expression of the human empirical knowledge. This paper proposes a system that makes extraction and classification of objects in an image. The system consists of a preprocessing, feature extraction and classification processes with fuzzy reasoning.

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  • Reduction in Perceptual Distortion for Wavelet Transform-Based Video Decoding

    MURATA Yutaka, KIKUCHI Hisakazu, MURAMATSU Shogo

    IEICE technical report  2007.7 

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    Motion JPEG2000 is a video coding system on the basis of wavelet transforms. It has many advantages such as easy editing, unified lossless/lossy compression, resolution and SNR scalabilities. However, there can produce some noise referred to as "flicker artifacts". Since it is visually annoying in a video sequence, it is strongly desirable to reduce it for quality decoding. In this paper, a distortion reduction method at a decoder is presented. The distortion is differentiated from the sequence movement by the region mean of frame difference. The information of previous frames is used to improve the perceptual appearance of the current frame. Experimental results demonstrate that the proposed method works well.

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  • Orthogonality of DWTs and Correlation of Distortion in Video Coding

    ADACHI Atsuyuki, HIKI Minoru, MURAMATSU Shogo, KIKUCH Hisakazu

    IEICE technical report  2007.7 

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    In this work, we evaluate the relation between the spatial correlation of the distortion in the reconstructecd picture and the orthogonality of DWTs in video coding. The DWTs used in JPEG2000 are known to yield fluctuation of hazy distortion when applied to motion picutres. Our conjecture is that the orthogonal property affects the artifacts. Simulation and coding experiments for real videos are shown for evaluating the relation between the spatial correlation of the distortion in the reconstructed picture and the orthogonal property of the transform.

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  • Spatio-temporal Filtering with Motion/Edge-based Prediction for Video Coding

    HIKI Minoru, MURAMATSU Shogo, KIKUCHI Hisakazu

    IEICE technical report  2007.7 

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    This work studies spatio-temporal filtering with motion/edge-based prediction for video coding, which is an alternative technique of non-separable motion-compensated spatio-temporal filtering (MCSTF). The proposed technique replaces motion compensation of MCSTF with edge-based prediction, and has an advantage in computational efficiency without motion-compensation. The proposed technique is based on the lifting scheme so that perfect reconstruction property is guaranteed. Some experimental results with JPEG2000 show the significance of our proposed technique.

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  • Perceptual Distortion Reduction in Wavelet Transform-Based Video Decoding

    MURATA Yutaka, KIKUCHI Hisakazu, MURAMATSU Shogo

    IEICE technical report  2007.6 

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    Motion JPEG2000 is a video coding system on the basis of wavelet transforms. It has many advantages such as easy editing, unified lossless/lossy compression, resolution and SNR scalabilities. However, there can produce some noise refered to as "flicker artifacts". We need to reduce it because it is visually annoying in a video sequence. In this paper, a distortion reduction method at a decoder is studied. The distortion is differentiaded from the sequence movement by the region mean of frame difference. The information of previous frames is used to improve the perceptual appearance of the current frame. Experimental results demonstrate that the proposed method works well.

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  • 映像符号化のための多次元非分離DWT

    安達充幸, 比企豊, 村松正吾, 菊池久和

    画像電子学会年次大会  2007.5 

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  • Linear-phase orthogonal nonseparable wavelet transforms for video coding and correlation of the distortion

    安達 充幸, 比企 豊, 村松 正吾

    回路とシステム軽井沢ワークショップ論文集  2007.4 

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  • Parallel computation of EM algorithm on a cell processor

    二田 晴彦, 村松 正吾, 菊池 久和

    回路とシステム軽井沢ワークショップ論文集  2007.4 

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  • Color demosaicing using asymmetric average interpolation and hue-transition smoothing

    高橋 善寿, 開 健太朗, 菊池 久和, 村松 正吾

    回路とシステム軽井沢ワークショップ論文集  2007.4 

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  • Functionally layered coding for river surveillance

    高橋 知将, 今井 裕二, 岩橋 政宏, 村松 正吾

    回路とシステム軽井沢ワークショップ  2007.4 

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  • Spatio-temporal Filtering with Edge-based Prediction for Video Coding

    HIKI Minoru, MURAMATSU Shogo, KIKUCHI Hisakazu

    IEICE technical report  2007.4 

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    This work studies spatio-temporal filtering with edge-based prediction for video coding, which is an alternative technique of non-separable motion-compensated spatio-temporal filtering (MCSTF). The proposed technique replaces motion-compensation of MCSTF with edge-based prediction, and has advantage in computational efficiency without motion-compensation. The proposed technique is based on the lifting scheme so that perfect reconstruction property is guaranteed. Some experimental results with JPEG2000 show the significance of our proposed technique.

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  • A-4-3 A Float-Point RTL Model of EM Algorithm for Gaussian Mixtures

    Watanabe Tsutomu, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the IEICE General Conference  2007.3 

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  • Real Time Analysis on Dynamic Periodontal Bacteria Image Using Digital Signal Processor

    KAMIMURA Masahiro, KIKUCHI Hisakazu, MURAMATSU Shogo

    ITE technical report  2006.12 

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  • Condensationアルゴリズムを用いた河川水面追跡

    小林信介, 村松正吾, 菊池久和, 岩橋政宏

    映像メディア処理シンポジウム(IMPS)  2006.11 

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  • EMアルゴリズムを用いた混合正規分布推定器のLSIアーキテクチャ

    本多秀章, 村松正吾, 菊池久和

    第21回信号処理シンポジウム  2006.11 

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  • 色相値の復元を利用したカラーデモゼイシングの検討

    開 健太朗, 高橋 善寿, 菊池 久和, 村松 正吾

    第21回画像符号化シンポジウム(PCSJ)  2006.11 

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  • EMアルゴリズムを用いた混合正規分布推定モジュールのLSIアーキテクチャ

    本多秀章, 村松正吾, 菊池久和

    第11回映像メディア処理シンポジウム  2006.11 

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  • EMアルゴリズムを用いた混合正規分布推定ハードウェアの実装

    本多秀章, 村松正吾, 菊池久和

    電子情報通信学会信越支部大会  2006.9 

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  • River State Classification with Dynamic Texture Analysis

    HIKI Minoru, MURAMATSU Shogo, KIKUCHI Hisakazu, IWAHASHI Masahiro

    ITE technical report  2006.8 

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  • Line Tracking with Condensation Algorithm and its Application to River Image Analysis

    KOBAYASHI Shinsuke, MURAMATSU Shogo, KIKUCHI Hisakazu, IWAHASHI Masahiro

    ITE technical report  2006.8 

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  • Visual Artifact Reduction Observed in Lower-Bitrate Video Encoded by Wavelet-Based Coding

    IIDA Takayuki, KIKUCHI Hisakazu, MURAMATSU Shogo

    IEICE technical report  2006.7 

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    Wavelet transform-based coding, like JPEG 2000, has various features such as high coding performance, unified lossless/lossy compression, resolution and SNR scalabilities. However, some visual artifacts produced by quantization appear in lower-bitrate video encoded by wavelet-based coding. It is indispensable to reduce visual artifacts with a flicker because they are visually noticeable. In this paper, we study the method of a spatio-temporal error diffusion to reduce the visual artifacts in video. The error is defined by a difference between an original frame and a decoded frame after quantization and it is diffused to the next frame to improve image quality. We show the validity of the proposed method by experiments.

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  • Motion-Compensated Spatio-Temporal Filtering with Reference-Type Variable-Coefficient Invertible Deinterlacer

    OKADA Toshiyuki, MURAMATSU Shogo, HIKI Minoru, KIKUCHI Hisakazu

    ITE technical report  2006.6 

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  • Performance Evaluation of Motion-Compensated Spatio-Temporal Filtering with Spatial DWT

    Minoru Hiki, Takuma Ishida, Shogo Muramatsu, Hisakazu Kikuch

    第19回回路とシステム軽井沢ワークショップ  2006.4 

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  • D-11-6 A Study on Lossless Image Compression by Embedded Coding

    Shinoda Kazuma, Kikuchi Hisakazu, Muramatsu Shogo

    Proceedings of the IEICE General Conference  2006.3 

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  • On Sub-sampling Lattices for Motion-Compensated Spatiotemporal Filtering (MCSTF)

    MURAMATSU Shogo, HIKI Minoru, ISHIDA Takuma, KIKUCHI Hisakazu

    ITE technical report  2005.12 

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  • On Bayesian Networks and Features for Player Face Detection in Soccer Videos

    TAKASHIMA Hiroaki, MURAMATSU Shogo, KIKUCHI Hisakazu

    ITE technical report  2005.12 

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  • Automatic setting of the threshold for Detecting Video Shot Boundaries in Wavelet Transform Domain

    NOMOTO Atsunori, HASEBE Satosi, MURAMATU Shogo, KIKUCHI Hisakazu

    ITE technical report  2005.12 

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  • Color Demosaicing Using Edge Directed Interpolation and Hue-Gradient Smoothing

    HIRAKI Kentaro, TAKAHASHI Yoshihisa, KIKUCHI Hisakazu, MURAMATSU Shogo

    ITE technical report  2005.12 

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  • 非対称算術平均補間によるカラーデモゼイシング

    高橋 善寿, 開 健太朗, 菊池 久和, 村松 正吾, 水谷 直喜

    第20回信号処理シンポジウム  2005.11 

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  • フィールド・スケーラブル映像符号化のための非分離MCTFの基礎検討

    比企豊, 石田拓麿, 村松正吾, 菊池久和

    画像符号化シンポジウム(PCSJ)  2005.11 

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  • 非可逆符号化を用いた可逆画像符号化法の検討

    篠田一馬, 村松正吾, 菊池久和

    画像符号化シンポジウム(PCSJ)  2005.11 

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  • EMアルゴリズムによる混合正規分布推定のためのCORDICを用いた隠れ変数事後確率計算モジュール

    小池和博, 村松正吾, 菊池久和

    電気関係学会北陸支部連合大会  2005.9 

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  • Hierarchical Variable-Coefficient Deinterlacer Banks for Scalable Video Coding

    ISHIDA Takuma, MURAMATSU Shogo, HIKI Minoru, KIKUCHI Hisakazu

    ITE technical report  2005.6 

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  • Dynamic Shape Description with CSS(Curvature Scale Space) for Video Retrieval

    KOBAYASHI Shinsuke, MURAMATSU Shogo, KIKUCHI Hisakazu

    Proceedings of the Annual Conference of the Institute of Image Electronics Engineers of Japan  2005.6 

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    Requirements of effective video retrieval is growing because of increase of video content distribution services. Therefore, in this report, we propose a feature descriptor that describe an object contour and its transformation. This descriptor is based on CSS(Curvature Scale Space) which is the shape descriptor defined in MPEG-7.

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  • 階層型動き補償デインタレーサバンクを用いた時空間多重解像度解析

    比企 豊, 石田 拓麿, 北川 大輔, 村松 正吾, 菊池 久和

    第18会回路とシステム軽井沢ワークショップ  2005.4 

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  • 可変係数デインタレーサバンクのための相互参照型パラメータ決定法

    村松正吾, 石田拓麿, 打田淳, 渡辺裕樹, 菊池久和

    第18回回路とシステム軽井沢ワークショップ  2005.4 

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  • Hardware Architecture of Point-based Deinterlacers

    MATSUNAGA Yoshinori, MURAMATSU Shogo, KIKUCHI Hisakazu

    Proceedings of the Annual Conference of the Institute of Image Electronics Engineers of Japan  2005 

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    Recent developments of the telecommunication infrastructures brought us many ways of visual communication. Thus, scalable video coding that can handle various formats on demand is required. In our laboratory, we have proposed deinterlacer banks with the perfect reconstruction property as a new tool of spatio-temporal scalable video coding. This work further proposes an architecture of an invertible deinterlacer, a component of deinterlacer banks, based on Face-Centered-Orthorhombic (FCO) sampling. The perfect reconstruction property is simulated through its VHDL model in order to verify the specification of the functionality. Then the performance is also evaluated through the synthesis results.

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  • ROI Extraction in Soccer Video Sequences

    TAKASHIMA Hiroaki, MURAMATU Shogo, KOBAYASHI Shinsuke, KIKUCHI Hisakazu

    Proceedings of the Annual Conference of the Institute of Image Electronics Engineers of Japan  2005 

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    In this work, we propose an automatic ROI extraction method with Bayesian networks .We apply a the Bayesian network to semantic transcoding by taking into account ROI in spatial domain. In our experiments, we use football sequences because of easyness of modeling probabilistic structure in scenes of video sequences. We evaluate the performance of our ROI extraction method by setting faces of football players as ROI. Several experiments showed that the proposed method can achieve high recall and precision rate and can extract football players faces only excluded other faces automatically.

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  • 動的に構築されるストーリーボードを用いた動画像閲覧

    長谷部聡, 村松正吾, 菊池久和

    映像メディア処理シンポジウム(IMPS)  2004.11 

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  • 非対称空間平均と反復によるデモゼイシングの提案

    高橋善寿, 菊池久和, 村松正吾, 阿部淑人, 水谷直喜

    第19回信号処理シンポジウム  2004.11 

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  • 時空間スケーラブル映像符号化のための階層型デインタレーサバンク

    石田拓麿, 村松正吾, 打田淳, 北川大輔, 菊池久和

    画像符号化シンポジウム(PCSJ)  2004.11 

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  • ストリーミングを考慮した品質主導型動画像符号化の検討

    角玄 涼, 水谷直喜, 長谷部聡, 村松正吾, 菊池久和

    電子情報通信学会信越支部大会  2004.10 

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  • 能動騒音制御システムのC6713DSKへの実装

    染谷秀明, 佐藤元樹, 村松正吾, 菊池久和

    第6回DSPS教育者会議  2004.10 

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  • 時空間ウェーブレット変換による動的テクスチャ解析とその応用

    今野裕也, 村松正吾, 佐々木重信, 周杰, 菊池久和

    電子情報通信学会信越支部大会  2004.10 

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  • DSPを用いた歯周病菌映像のリアルタイム解析

    金子昌弘, 長谷部聡, 村松正吾, 菊池久和, 角田勇

    電子情報通信学会信越支部大会  2004.10 

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  • JPEG2000係数ビットモデリング部のハードウェア実装に関する一検討

    緑川健志, 村松正吾, 周杰, 佐々木重信, 菊池久和

    電子情報通信学会信越支部大会  2004.10 

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  • ドットフォーミングハーフトーンの提案

    斎藤一幸, 菊池久和, 村松正吾, 阿部淑人

    日本画像学会年次大会  2004.6 

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  • フィールドスケーラブル映像符号化のための完全再構成デインタレーサバンク

    石田拓麿, 村松正吾, 北川大輔, 小林信介, 菊池久和

    第17回回路とシステム軽井沢ワークショップ  2004.4 

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  • ウェーブレット係数のクラスタリングによるキーフレーム選択

    長谷部聡, 南雲真, 村松正吾, 菊池久和

    第17回回路とシステム軽井沢ワークショップ  2004.4 

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  • D-11-11 Maximally-Decimated Perfect Reconstruction Deinterlacer Banks Based on FCO Sampling

    KITAGAWA Daisuke, ISHIDA Takuma, MURAMATSU Shogo, KIKUCHI Hisakazu

    Proceedings of the IEICE General Conference  2004.3 

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  • On Rake Reception of Ultra Wideband (UWB) Signal over Dense Multipath Channels for various Pulse-widths

    M. A. Rahman, S. Sasaki, J. Zhou, S. Muramatsu, H. Kikuchi

    電子情報通信学会ワイドバンドシステム研究会  2004.3 

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  • On Rake Reception of Ultra Wideband (UWB) Signals Over Dense Multipath Channels for Various Pulse-widths

    RAHMAN Mohammad Azizur, SASAKI Shigenobu, ZHOU Jie, MURAMATSU Shogo, KIKUCHI Hisakazu

    IEICE technical report. WBS, Wideband System  2004.2 

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    In this paper we present extensive simulation results on various Rake reception of ultra wideband (UWB) signals over IEEE 802.15.3a realistic UWB channel models using BPSK modulation. Convolving the continuous time impulse response with the transmitted pulse and adding WON, we produce the multipath profile in front of the receiver. We show that the more the pulse-width gets shorter, the more fraction of the energy comes to the receiver through isolated paths. Oppositely, the wider is the pulse, the more fraction of the energy is in overlapped path and the more is the multipath fade. We show performance of all Rake (ARake) and selective Rake (SRake) receivers by optimal delay estimation and by ordinary method. We observe wide performance variations in the two methods. We also show an optimum pulse-width for an SRake receiver for each channel model (CM1〜CM3).

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  • Hardware Implementation of Invertible Deinterlacing with Horizontal Decimation of Coefficient Parameters

    SOYAMA Tatsuumi, UCHITA Jun, ISHIDA Takuma, MURAMATSU Shogo, KIKUCHI Hisakazu, KUGE Tetsuro

    IEICE technical report. Circuits and systems  2004.1 

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    In this report, an architecture of invertible deinterlacing with horizontal decimation of coefficient-parameter is proposed. Invertible deinterlacing can be used for interlaced video as preprocessing of frame-based motion picture codec, such as Motion-JPEG2000 (MJP2). When simple field-interleaving is used, comb-tooth artifacts may appear around edges of motion objects. In contrast, invertible deinterlacing technique can suppress comb-tooth artifacts and also guaranties original picture recovery on demand. In previous work, we have developed a variable coefficient scheme with a motion detection filter, which realizes adaptability to local characteristics of pictures. When the scheme is applied to an image codec, it is necessary to send the coefficient parameters to receivers to recover the original image. Before we have shown that the coefficient parameters can be reduced by horizontally decimating while maintaining the comb-tooth suppression ability. This report shows that an architecture of our proposed parameter decimation approach, of which performance is also evaluated by using VHDL models.

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  • Parameter Embedding Method of Variable-Coefficient Invertible Deinterlacer into ROI in Motion-JPEG2000

    UCHITA Jun, SOYAMA Tatsuumi, ISHIDA Takuma, MURAMATSU Shogo, KIKUCHI Hisakazu, KUGE Tetsuro

    IEICE technical report. Circuits and systems  2004.1 

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    In this report, a coefficient-parameter embedding method is proposed for invertible deinterlacing with variable coefficients in the application to Motion-JPEG2000 (MJP2). Invertible deinterlacing, which the authors have developed before, can be used as a preprocess of frame-based motion picture codec, such as MJP2, for interlaced videos. When the conventional field-interleaving is used instead, comb-tooth artifacts appear around edges of moving objects. On the other hand, the invertible deinterlacing technique allows us to suppress the comb-tooth artifacts and also to recover an original picture on demand. As previous works, the authors have developed a variable coefficient scheme with a motion detector, which realizes adaptability to local characteristics of given pictures. When applying this deinterlacing technique to an image codec, however, it is required to send coefficient parameters to receivers for original picture recovery. This work proposes a parameter-embedding technique and constructs a standard stream which consists both of picture data and parameters. We investigate to embed the parameters into the LH_1 component of the wavelet domain through the ROI (region of interest) function of JPEG2000 without significant loss in the performance of comb-tooth supression.

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  • 内容型動画像検索を考慮したウェーブレット変換領域におけるショット境界検出

    長谷部聡, 南雲真, 村松正吾, 周杰, 佐々木重信, 菊池久和

    第18回デジタル信号処理シンポジウム  2003.11 

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  • Effects of Partial Band Jamming on the Performance of Generalized Selection Combining Rake Receiver in Direct Sequence Spread Spectrum(DS-SS) Communications

    RAHMAN Mohammad Azizur, SASAKI Shigenobu, ZHOU Jie, MURAMATSU Shogo, KIKUCHI Hisakazu

    IEICE technical report. WBS, Wideband System  2003.10 

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    Effects of partial band jamming on the performance of generalized selection combining (GSC) Rake receiver in direct sequence spread spectrum (DS-SS) communications have been investigated. Especially, we focus on effects of jamming on optimum spreading bandwidth for a fixed complexity GSC Rake receiver. The received signals are considered to undergo multipath fading over an independently and identically distributed (i.i.d.) Rayleigh channel, Expressions for performance measure at jamming environment have been derived as a function of system parameters and signal to jamming power ratio (P/J). A flat power delay profile (PDP) is considered for DS-SS. The idea is extended to direct sequence ultra wideband (DS-UWB) communications considering an exponentially decaying PDP. A fixed complexity GSC receiver designed to perform optimally for a given system bandwidth by outputting minimum achievable BEP, is found to perform sub-optimally in presence of jamming in both cases. However, effects of jamming are much less pronounced in case of a decaying PDP.

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  • 歯周病菌映像からの菌体抽出と追跡および活性度評価

    大場正也, 長谷部聡, 金子昌弘, 村松正吾, 菊池久和, 東福寺幾夫

    電子情報通信学会信越支部大会  2003.10 

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  • Impact of Narrowband Interference and Timing Jitter for Multiphase DS-UWB Signals

    Kusama Takumi, Sasaki Shigenobu, Zhou Jie, Muramatsu Shogo, kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2003.9 

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  • A lossless implementation of invertible deinterlacing for Motion-JPEG2000

    Ishida Takuma, Muramatsu Shogo, Zhou Jie, Sasaki Shigenobu, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2003.9 

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  • Extraction of MPEG-7 Color Layout Discriptor from JPEG2000 Pictures

    Iwafuchi Toshihiro, Muramatsu Shogo, Zhou Jie, Sasaki Shigenobu, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2003.9 

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  • Iterative Demodulation / Decoding for Coded Differential Parallel Combinatorial Spread Spectrum Systems

    Sasaki Shigenobu, Asakawa Masashi, Hafuka Takamitsu, Zhou Jie, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2003.9 

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  • Generalized Equations for Spatial Correlation of a Circular Antenna Array

    ISHIZAWA Kenta, ZHOU Jie, SASAKI Shigenobu, MURAMATSU Shogo, KIKUCHI Hisakazu

    Proceedings of the Society Conference of IEICE  2003.9 

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  • Two-Step Algorithm for Detecting Video Shot Boundaries in a Wavelet Transform Domain

    HASEBE Satoshi, MURAMATSU Shogo, ZHOU Jie, SASAKI Shigenobu, KIKUCHI Hisakazu

    ITE technical report  2003.6 

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  • Evaluation of Filters in Invertible Deinterlacing for Motion-JPEG2000

    ISHIDA Takuma, MURAMATSU Shogo, JIE ZHOU, SASAKI Shigenobu, KIKUCHI Hisakazu

    ITE technical report  2003.6 

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  • Impact of Narrowband Interference and Timing Jitter in DS-UWB System

    SASAKI Shigenobu, KUSAMA Takumi, ZHOU Jie, MURAMATSU Shogo, KIKUCHI Hisakazu

    IEICE technical report. WBS, Wideband System  2003.5 

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    Ultra-wideband (UWB) is a new wireless communications technology using very short pulses less than a few nano-seconds. Transmitting signal usually occupies several giga-hertz bandwidth. In UWB communications, timing jitter at pulse generators causes the performance degradation. Narrowband interference (NBI) from conventional wireless communication entities is also a major degrading factor for error-rate performances in UWB systems. In this paper, we investigated impact of timing jitter and NBI in UWB system employing direct sequence spread spectrum (DS/SS) modulation. Gaussian monocycle pulse and modulated gaussian pulse is considered as the pulse waveforms. Simulation results show that root-mean-square (RMS) jitter should be less than a few percent of pulse width in order to maintain the ideal error-rate performance. If signal to interference ratio (SIR) becomes less than 20 dB,error rate performance is getting worse, especially modulated gaussian pulse is employed.

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  • Coefficient-Parameter Reduction of Invertible Deinterlacing with Variable Coefficients by Horizontal Decimation

    MURAMATSU S, UCHITA J, ISHIDA T, KIKUCHI H, KUGE T

    Technical report of IEICE. DSP  2003.3 

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    ln this report, a coefficient-parameter-reduction method is proposed for invertible deinterlacing with variable coefficients. Invertible deinterlacing, which the authors have developed, can be used for interlaced video as preprocessing of frame-based motion picture codec, such as Motion-JPEG2000(MJP2). When simple conventional field-interleaving is used, comb-tooth artifacts may appear around edges of motion objects. 0n the other hand, the invertible deiliterlacing technique allows us to suppress comb-tooth artifacts and also to restore an original picture on demand. As previous works, the authors have developed a variable coefficient scheme with a motion detection filter, which realizes adaptability to local characteristics of pictures. When applying this deinterlacing technique to an image codec. It is necessary to send coefficient parameters to receivers for original picture recovery. This report shows that these coefficient parameters can be reduced by decimating horizontally without significant loss of comb-tooth suppression ability.

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  • A method of video shot boundary detection on a wavelet-transformed domain

    Nagumo Makoto, Hasebe Satoshi, Muramatsu Shogo, Zhou Jie, Sasaki Shigenobu, Kikuchi Hisakazu

    Proceedings of the IEICE General Conference  2003.3 

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  • マルチレート・マルチユーザ環境におけるDS/CDMAパケットセルラーシステムの性能評価

    石澤賢太, 周杰, 佐々木重信, 村松正吾, 菊池久和

    電子情報通信学会総合大会  2003.3 

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  • M-ary TH/CSK Systems for Ultra Wideband (UWB) Wireless Communications

    SASAKI Shigenobu, SUZUKI Tomohiko, ZHOU Jie, MURAMATSU Shogo, KIKUCHI Hisakazu

    Technical report of IEICE. SST  2002.6 

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    In this paper, we propose a M-ary time-hopping/code shift keying (M-ary Th/CSK) modulation for ultra-wideband (UWB) wireless communications. UWB transmission is a promising technology in the future high-rate wireless personal area network (WPAN). Since very short pulse is used in UWB system, transmitting signal occupies extremely wide bandwidth. In the proposed M-ary TH/CSK system, an element of time-hopped sequence is used for choosing a transmitting code sequence among pre-assigned codes. A set of optical orthogonal code and its cyclic shift is used as a set of pre-assigned codes. Transmitter and receiver configurations of M-ary TH/CSK system are described. Preliminary result of error rate performance is also displayed under AWGN environment.

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  • Invertible Deinterlacing with Variable Coefficients

    MURAMATSU Shogo, ISHIDA Takuma, KIKUCHI Hisakazu, KUGE Tetsuro

    Technical report of IEICE. DSP  2002.6 

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    In this work, invertible deinterlacing with variable coefficients is proposed. As previous works, we have developed invertible deinterlacing that suppresses comb-shaped artifacts caused by field-interleaving for interlaced scanning video, which affect the quality of low-bitrate intraframe-based codec such as Motion-JPEG2000. However, since the coefficients of the deinterlacing filters are fixed it is not necessarily optimal for local characteristics of given pictures. To improve local adaptability, we propose to introduce variable coefficients so that filters can be changed according to local properties of pictures, while keeping the invertibility. The performance of our proposed method is evaluated by showing the effect as a deinteralcing prefilter, and also the coding efficiency of a whole system in which our proposed method is embeded.

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  • M-ary TH/CSK Systems for Ultra Wideband (UWB) Wireless Communications

    SASAKI Shigenobu, SUZUKI Tomohiko, ZHOU Jie, MURAMATSU Shogo, KIKUCHI Hisakazu

    Technical report of IEICE. SAT  2002.6 

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    In this paper, we propose a M-ary time-hopping/code shift keying (M-ary TH/CSK) modulation for ultra-wideband (UWB) wireless communications. UWB transmission is a promising technology in the future highrate wireless personal area network (WPAN). Since very short pulse is used in UWB system, transmitting signal occupies extremely wide bandwidth. Inthe proposed M-ary TH/CSK system, an element of time-hopped sequence is used for choosing a transmitting code sequence among pre-assigned codes. A set of optical orthogonal code and its cyclic shift is used as a set of pre-assigned codes. Transmitter and receiver configurations of M-ary TH/CSK system are described. Preliminary result of error rate performance is also displayed under AWGN environment.

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  • Finer-Scale Pseudo Gray for an sRGB CRT Monitor

    KIKUCHI Hisakazu, SATO Hiroto, HASEBE Satoshi, MIZUTANI Naoki, MURAMATSU Shogo, SASAKI Shigenobu, ZHOU Jie, SEKINE Seishi, ABE Yoshito, NAKASHIZUKA Makoto

    Technical report of IEICE. DSP  2002.5 

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    Fine grayscale data, which exceed eight bits per pixel, are mapped onto points around the achromatic axis in the 8-bit sRGB color space so as to be displayed on an 8-bit sRGB CRT monitor. The characteristics of the pseudo gray are investigated in terms of the CIELAB color difference and a^*b^* coordinates.

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  • 完全再構成デ・インタレース化処理のリフティング実装

    曽山 竜海, 石田 拓麿, 村松 正吾, 菊池 久和, 久下 哲郎

    第15回回路とシステム(軽井沢)ワークショップ  2002.4 

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  • 3-Dimensional Significance Descriptor for Content-Based Video Retrieval

    村松 正吾谷部聡, 村松正吾, 佐々木重信, 菊池久和

    第15回回路とシステム(軽井沢)ワークショップ  2002.4 

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  • Efficient Estimation Scheme of Channel State Information for Parallel Combinatorial SS Sytems(2)

    Takizawa Kenichi, Sasaki Shigenobu, Zhou Jie, Muramatsu Shogo, Kikuhchi Hisakazu

    Proceedings of the IEICE General Conference  2002.3 

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  • Forward Link Capacity of a CDMA Cellular System with Mixed Cell Sizes

    H.Zhao, H.Kikuchi, J.Zhou, S.Sasaki, S.Muramatsu

    電子情報通信学会総合大会  2002.3 

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  • Performance Investigation of Diversity Reception with Perfect/Imperfect Channel Evaluation

    J.Zhou, H.Kikuchi, S.Sasaki, S.Muramatsu

    電子情報通信学会総合大会  2002.3 

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  • Iterative demodulation/decoding for multiphase parallel combinatorial spread spectrum systems

    HAFUKA Takamitsu, SASAKI Shigenobu, TAKIZAWA Ken-ichi, ZHOU Jie, MURAMATSU Shogo, KIKUCHI Hisakazu

    情報理論とその応用シンポジウム予稿集 = The proceedings of the Symposium on Information Theory and Its Applications  2001.12 

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  • Intra-Frame/Field-Based Motion Picture Coding with Perfect Reconstruction De-interlacing

    ISHIDA T, MURAMATSU S, Z. JIE, SASAKI S, KIKUCHI H

    IEICE technical report. Circuits and systems  2001.11 

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    In this work, we consider applying perfect reconstruction de-interlaing to intra-frame/field-based codec system so that the system structure can realize a rich scalability with one bit stream according to requirements for image quality. When the conventional field interleaving or separation is applied for an interlaced picture, the intra-frame/field-based codec system causes horizontal comb-shape artifacts at edges of motion part or aliasing. Due to these effects, the low-bitrate-decoded pictures are degraded around the edges. The proposed technique is shown that the pictures decoded on low bitrate causes less comb-shape artifacts except for extra-process and the one decoded on high bitrate are able to be kept the spacial-resolution. It is also shown that the efficient implementation and lossless implementation exist for a unique case.

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  • 空間-時間ブロック符号化並列組合せSS方式に関する一検討

    村松 正吾早川, 佐々木, 周, 村松, 菊池

    電子情報通信学会信越支部大会  2001.10 

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  • Repeat-Accumulate符号を用いたDS/SS通信システムの検討

    吉野, 佐々木, 周, 村松, 菊池

    電子情報通信学会信越支部大会  2001.10 

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  • Spectrum Sharing System of TDMA/W-CDMA with Interference Cancellation

    Jie Zhou, H.Kikuchi, S.Sasaki, S.Muramatsu

    電子情報通信学会信越支部大会  2001.10 

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  • BER Performance Evaluation of a CDMA Cellular System with a Combination of Tilted Antenna Arrays and Power Control

    Jie Zhou, H.Kikuchi, S.Sasaki, S.Muramatsu, Y.Onozato

    電子情報通信学会ソサイエティ大会  2001.9 

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  • Separate FEC Coding for Parallel Combinatorial SS Systems

    Harada Tomoyuki, Sasaki Shigenobu, Kikuchi Hisakazu, Muramatsu Shogo, Jie Zhou

    Proceedings of the Society Conference of IEICE  2001.8 

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  • An Approach to Fast Content-based Video Querying Based on a Wavelet Decomposition

    Hasebe Satoshi, Muramatsu Shogo, Sasaki Shigenobu, Jie Zhou, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2001.8 

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  • Efficient Estimation Scheme of Channel State Information for PC/SS Systems

    Takizawa Ken-ichi, Sasaki Shigenobu, Zhou Jie, Muramatsu Shogo, Kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2001.8 

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  • Performance Evaluations for Block Coded Parallel Combinatorial Spread Spectrum Systems with Iterative Demodulation/Decoding

    TAKIZAWA Kenichi, SASAKI Shigenobu, ZHOU Jie, MURAMATSU Shogo, KIKUCHI Hisakazu

    Technical report of IEICE. DSP  2001.7 

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    We dcrive the upper bound of the bit crror rate for block coded parallcl combinatorial spread spectrum(PC/SS)systems with an itcrative demodulation/decoding. In this paper, the suitable selecting mcthod for the constant weight code has been discussed by using the dcrived upper bound. The result is that constant weight codes made from a Hadamard matrix are superior to Shalkwijk's constant weight codes on the block coded PC/SS systems with iterative demodulation/decoding from the viewpoint of the asympotic error rate. We have also compared the bit error rate performances of Reed-Solomon codcd systems with the performances of proposed demodulation/decoding systems. Bit error performance in the proposed systems are superior to that in Reed Solomon coded systems in the term of the required signal to noise ratio per bit for satisfying 10^-6 BER.

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  • パケット伝送における階層的誤り制御を組み合わせたゼロツリー 画像符号化法

    佐々木, 菊池, 村松

    第3回YRP移動体通信産学官交流シンポジウム  2001.7 

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  • A Bit-Operation-Based Algorithm of Dominant Color Extraction

    KURIHARA Tomotaka, MURAMATSU Shogo, SASAKI Sigenobu, KIKUCHI Hisakazu

    Proceedings of the IEICE General Conference  2001.3 

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  • Multistage Forward Error Correction for Wavelet Zerotree Image Coding in Packet Transmission

    SHIRAI Michitomo, SASAKI Shigenobu, MURAMATSU Shogo, JOO Sang-hyun, KIKUCHI Hisakazu

    IEICE technical report. Circuits and systems  2001.1 

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    In this paper, a hybrid method of wavelet zerotree image coding and forward error correction(FEC)by using product code is proposed for packet transmission.A modified packetization scheme for wavelet zerotree image coding is proposed to localize the impact of packet loss and bit errors.FEC coding by using Reed-Solomon product code is applied to protect image data from packet loss and bit errors.Computer simulation based on ATM(asynchronous transfer mode)network is performed.Results shows that the proposed method effectively works to protect compressed image data from packet loss and channel bit errors.

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  • ウェーブレット変換領域における動き推定(信号処理シンポジウム)

    大塚, 山田, 菊池, 朱, 村松

    第15回デジタル信号処理シンポジウム  2000.11 

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  • 無遅延サブバンド適応フィルタによる騒音制御について

    伊藤,村松, 菊池, 佐々木, 冨澤

    電気学会東京支部新潟支所研究発表会  2000.11 

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  • カーディナルスプライン補間を用いた画像加工に適した輪郭抽出表現についての検討

    鈴木,中静, 菊池,村松

    電気学会東京支部新潟支所研究発表会  2000.11 

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  • 医療画像の蓄積と伝送に関する研究

    佐藤,水谷,菊池, 佐々木,朱, 村松, 内藤,酒井

    電気学会東京支部新潟支所研究発表会  2000.11 

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  • ウェーブレット変換領域における動き推定(画像符号化シンポジウム)

    山田, 菊池, 佐々木, 朱, 村松

    画像符号化シンポジウム (PCSJ)  2000.11 

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  • Memory Access Estimation of Filter Bank Implementation on Different DSP Architectures

    MIZUTANI Naoki, MURAMATSU Shogo, KIKUCHI Hisakazu

    Technical report of IEICE. DSP  2000.10 

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    In this report, supposing digital signal processors (DSP) of different architectures, the efficient implementation of filter banks is investigated. Especially, focusing on the memory accesses, the number of memory transfers, the power consumptions and the processing accuracies are discussed. DSP 〓mploys the Harvard architecture for fast signal processing and has special functional units, such as multiplier-and-accumulator (MAC) units, Barrel shifters and so forth. Even if looking only the MAC units, however, there are some differences in the number of units, the number of accumulators and so forth. In addition, the processing procedure influences the efficiency of memory accesses and the processing accuracy. It is known that the extra memory accesses affects the power consumption, and is very important problem. On the other hand, filter banks are known as an element technique of subband coding and wavelet coding. Thus, their efficient implementation is expected. In this report, firstly the unified representation of analyses and synthesis banks are introduced and then it is divided into two types of procedures. These procedures are investigated with MAC units of different architectures.

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  • 医療画像の蓄積と伝送に関する研究

    村松 正吾水谷, 佐藤,菊池, 佐々木,朱, 村松, 内藤,酒井

    電子情報通信学会信越支部大会  2000.10 

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  • 陪直交変調方式における繰り返し復調/復号に関する一検討

    滝沢,佐々木, 菊池,村松

    電子情報通信学会信越支部大会  2000.10 

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  • Zerotree Image Coding for Packet Transmission

    Shirai Michitomo, Muramatu Shougo, Sasaki Shigenobu, kikuchi Hisakazu

    Proceedings of the Society Conference of IEICE  2000.9 

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  • Motion Estimation with Power Scalability and Its VHDL Model

    TAKAGI Ayuko, MURAMATSU Shogo, KIYA Hitoshi

    Technical report of IEICE. DSP  1999.12 

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    In this paper, motion estimation with power scalability is proposed for low-bit motion estimation. To reduce the power of motion estimator, algorithms using less gray level image has been proposed. In the case of motion estimation with images of low-bit, the accuracy of motion estimation depends on the thresholds of the quantization and image degradation occurs. Using low-bit images, the power is proportional to bit width: less bit width results less power. There is a trade off between image quality and power. Low power is not always the desired condition, and we must be able to choose the suitable behavior for motion estimator from the viewpoint of both image quality and power. We propose an architecture for low-bit motion estimator which can select the desired bit width for image. By controlling the bit width, we can achieve the scalability of power for motion estimation. To verify the significance, the performance is estimated by using the synthesis result of the VHDL.

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  • A Hardware Architecture of Motion Estimator with 8x8 Block Mode for MPEG4 and Its VHDL Model

    SAKAMOTO Kenji, MURAMATSU Shogo, KIYA Hitoshi, YAMADA Akihiko

    Technical report of IEICE. DSP  1999.6 

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    In MPEG4, a new moving picture coding standard, there both 16×16 block mode and 8×8 block mode. In this report, we propose a linear array architecture of motion estimatior with 8×8 block mode. The proposed architecture is improved in both the internal of processing elements (PE) and comparator module from the conventional one. The input is the same as the conventional one. In the internal of PE, some multiplexers and an accumulater are added to the convetional architecture. The improvement of the conventional PE makes it possible to select and accumulate the sum of absolute differences (SAD) in the 8×8 block mode. Since the output timing of SAD in the 8×8 block mode differs from that of 16×16 block mode, This paper proposes two architecture for the 8×8 block mode. The verify the significance for VLSI implementation, the performance is estimated by using the synthesis result of the VHDL.

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  • A VLSI Architecture of Median-Cut Quantization for Low-Bit Motion Estimation

    MURAMATSU Shogo, KIYA Hitoshi, YAMADA Akihiko

    Technical report of IEICE. DSP  1999.6 

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    In this work, a bit-operation algorithm for the median-cut quantization (MCQ) is proposed and then the VLSI architecture is provided for low-bit block matching motion estimation. MCQ is the thechnique that reduces multi-valued samples to binary-valued ones by adaptively taking the median value as the threshold. In the proposed method, the search process of the median value is derived from the quick-sort algorithm. Samples are quantized during the search process. Firstly, the bit-serial procedure is shown, and then it is modified to the bit-parallel procedure. The extension to the multi-level quantization is also discussed. Since the proposed algorithm is based on bit poerations, it is suitable for the VLSI implementation. To verify the significance, for the application to the motion estimation, the performance is estimated from the synthesis result of the VHDL model.

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  • A Linear Array Architecture of Motion Estimator with 8×8 Block Mode for MPEG4

    SAKAMOTO Kenji, MURAMATSU Shogo, KIYA Hitoshi, YAMADA Akihiko

    Proceedings of the IEICE General Conference  1999.3 

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  • Hardware Model Based Evaluation of Irredundant Full Search Motion Estimation

    TAKAYAMA Katsumi, MURAMATSU Shogo, KIYA Hitoshi, YAMADA Akihiko

    Technical report of IEICE. VLD  1999.3 

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    This report evaluate an irredundant full search motion estimation with a hardware model. The behavior of this model is based on software pipelining with conditional branches. The model dynamically generates an instruction to execute a irredundant full search motion estimation and the instruction is generated from a code scheduled by software pipelinirag. Simulation results with this model shows a effectiveness of the behavior of this model and we present some required hardware resources,the number of some functional units, memory bandwidth, and required frequency for real time motion estimation.

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  • Improving the Computational Redundancy of Spatially Segmented Wavelet Transform

    MURAKAMI Masaharu, KIYA Hitoshi, MURAMATSU Shogo, KIMURA Seiji, FUKUHARA Takahiro

    IEICE technical report. Image engineering  1999.2 

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    In this report, we discuss tiling wavelet tranforms in which an input image is partitioned into tiles and then the wavelet transform is executed on each tile. One of the conventional tiling methods, Spatially Segmented Wavelet Transform (SSWT), needs overlapping tiles to avoid block distortion along the boundaries of the tiles. Moreover, the overlap size of tiles must be decided by the number of stage S and the length of filters L, before executing the transformation. It approximately increases in proportion to 2^<S-1> and L. These limitations generate a lot of redundant calculations and disturb the adaptive transformations. In this report, we propose a new tiling method which gives the same wavelet coefficients as those of the SSWT, by using different approach. Thus, the proposed method does not generate the block distortion. Since the overlap size of tiles in the proposed method is independent of the number of stage S, it is possible to improve both problems of computational redundancy and adaptive transformation.

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  • Multidimensional Filter Banks Without Checkerboard Effects

    HARADA Yasuhiro, MURAMATSU Shogo, KIYA Hitoshi

    Technical report of IEICE. DSP  1997.10 

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    The checkerboard effect is caused by the periodic time-variant property of interpolators which compose a multirate system. Although the condition for some multirate systems to avoid the checkerboard effect has been shown, the checkerboard effect in multidimensional filter banks has not been considered. In this paper, the condition for multidimensional filter banks to avoid the checkerboard effect is considered. Besides, the properties of the multidimensional filters with no checkerboard effect are given, and it is shown that necessary and sufficient condition for one dimensional multirate filters with no checkerboard effect is not necessary and sufficient one for multidimensional filters but sufficient one. Simulation examples show that the checkerboard effect can be avoided by using the proposed condition.

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  • Checkerboard Effects in Multidimensional Multirate Systems

    HARADA Yasuhiro, MURAMATSU Shogo, KIYA Hitoshi

    Technical report of IEICE. DSP  1997.6 

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    The checkerboard effect is caused by the periodic time-variant property of the interpolator which composes a multirate system. Although the condition for one-dimensional multirate systems with no checerboard effect has been shown, the checkerboard effect in multidimensional multirate systems has not been considered. In this paper, the condition for multidimensional sampling rate conversion with no checkerboard effect is considerd. Simulation examples show that the checkerboard effect can be avoided by using the proposed condition.

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  • A Design Method of Multidimensional Linear-Phase Paraunitary Filter Banks with a Lattice Structure

    MURAMATSU Shogo, YAMADA Akihiko, KIYA Hitoshi

    Technical report of IEICE. DSP  1997.6 

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    In this work, a lattice structure of multidimensional linear-phase paraunitary filter banks (MD-LPPUFB) is proposed so as to design such systems in a systematic way. Our proposed structure has a capability to produce MD-LPPUFB whose filters all have the region of support generated by the product of the decimation matrix M with an extension matrix, which is introduced to extend the region of support generated by M. Since both of the paraunitary and linear-phase properties are structurely restricted, an unconstrained optimization process can be used to design it. Our proposed structure is developed for both of even and odd number of channels, and includes the conventional 1D system as a special case. Some design examples show the significance of our proposed structure, where both of the rectangular and non-rectangular decimation cases are given.

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  • A JPEG/MPEG-Compatible Subband Coding System

    MURAMATSU Shogo, YAMADA Akihiko, KIYA Hitoshi

    Technical report of IEICE. DSP  1997.3 

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    In this report, a structure of JPEG/MPEG-compatible subband codec (SBC) system is proposed on the basis of the generalized lapped orthogonal transform (GenLOT). Compatible here means the ability of SBC systems to encode and decode the standard bit-streams. Since our proposed structure consists of the discrete cosine transform (DCT) employed in JPEG and MPEG, the compatibility can be simply achieved. The structure also enables us to process DCT coefficients and subband signals of GenLOT in common. Furthermore, it employs an efficient structure of GenLOT for finete-duration sequences, which based on the symmetric extension method, so as to avoid the size-increasing of subband signals. Hence, our proposed structure is shown to provide all efficient JPEG/MPEG-compatible SBC system, which has no redundancy due to the signal extension and no size-increasing. In addition, it has an advantage or no checkerboard artifact addressed for SBC system.

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  • Implementation of Sampling Rate Conversion With Fewer Delay

    ZOU Xiaoxia, MURAMATSU Shogo, KIYA Hitoshi

    Technical report of IEICE. DSP  1996.12 

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    Input-output delay caused by using fast Fourier transform (FFT) in sampling rate conversion system is considered in this paper. The proposed method can avoid the redundant operations caused by sampling rate conversion completely and moreover has fewer input-output delay for FIR filtering based on FFT. The relationship between the input-output delay and the opttimum block size corresponding to the computational complexity is investigated for the proposed method. As a result, it is shown that a good tradeoff between the computational complexity and input-output delay can be achieved.

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  • Two-Channel QMF Banks without Checkerboard Effect

    HARADA Yasuhiro, MURAMATSU Shogo, KIYA Hitoshi

    IEICE technical report. Circuits and systems  1996.9 

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    Although filter banks are designed to have the perfect reconstruction property, this property is not satisfied in some practical applications. In this case, filter banks behave as time-variant systems. As a result, the checkerboard effect is caused. In this paper, the condition for two channel filter banks with no checkerboard effect is shown, and for two channel FIR paraunitary QMF banks with real coefficients, a new design method to satisfy the condition is proposed. Our proposed method has a complete expression, and can be performed as unconstrained optimization.

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  • An Efficient Structure of Generalized LOT for Finite-Duration Sequences : Efficient implementation of a symmetric extension method

    MURAMATSU Shogo, KIYA Hitoshi

    Technical report of IEICE. DSP  1996.7 

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    The generalized lapped orthogonal transform (GenLOT) is expected to be applied to subband image coding. In this work, an efficient structure of GenLOT for finite-duration sequences is proposed. Since the linear filtering of finite-duration sequences generates longer duration outputs, it is not desirable to use it in image processing. Thus, to solve this provlem, the symmetric extension method has been proposed. It is the technique which symmetrically and periodically extends their inputs before convolving, and is superior to circular convolution in terms of the less distorition at the boundaries. Our proposed structure is derived from the symmetric extension method. In fact, the structure does not require any extension of sequences, and the conventional fast algorithm is still available. Furthermore, our proposed structure can be regarded as a generalized one of lapped orthogonal transforms (LOT) for finite-duration sequences.

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  • Evolution of Linear-Phase Orthonormal M-band DTWT using the modified GenLOT

    Harada Yasuhiro, Muramatu Shogo, Kiya Hitoshi

    Proceedings of the IEICE General Conference  1996.3 

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    本報告では、先に我々が提案した改良GenLOT(一般化重複直交変換)の直線位相正規直交M帯域DTWT(離散時間ウェーブレット変換)への応用を検討する。この際、従来のGenLOT及び、コサイン変調に基づくパラユニタリフィルタバンクの一種である拡張重複変換(ELT)を用いたM帯域DTWTと、符号化利得及び演算量の点で比較を行なう。これらの比較により改良GenLOTの有効性を確認する。

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  • A Design Method of Oversampled Paraunitary DFT Filter Banks using Householder's factorization

    KAJITA Kuniyuki, KOBAYASHI Hiroyuki, MURAMATSU Shogo, YAMADA Akihiko, KIYA Hitoshi

    Technical report of IEICE. DSP  1995.12 

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    It is known that there exists FIR filters which satisfy perfect reconstruction condition of oversampled DFT filter banks. However, the general design methods are not addressed. In this work we propose a design method of oversampled DFT filter banks using paraunitary property which enable us to choose arbitray decimation ratio D less than the number of channel M, under filter length as the multiple of common number of M and D. Our proposed method gives us perfect reconstruction FIR DFT filter banks with sufficient stopband attenuation which is important for applying to subband adaptive filters. Besides, we also show a design method for oversampled paraunitary DFT filter banks with linear phases. In order to show effectiveness of our method, we give design examples.

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  • On Image Interpolation with DCT-II : the Investigation Based on Symmetric Convolution and the Reduction of Blocking Artifacts

    MURAMATSU Shogo, KIYA Hitoshi

    IEICE technical report. Circuits and systems  1995.6 

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    In the interpolation of an image with type-II discrete cosine transform (DCT-II), there is a problem that produced images exhibit the visually annoying blocking artifact. In this work, the problem is theoretically investigated, and a method to solve it is proposed. Firstly, sampling-rate conversion with symmetric convolution is considered. Then, by regarding the interpolation with DCT-II as the special case of the conversion, the cause of blocking artifacts is investigated. Following this investigation, a technique using overlap-add method to reduce the blocking artifact is proposed, and so is a pseudo overlap-add method for the computational efficiency. And finally, the effectiveness of our proposed method is verified by simulation examples.

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  • A-129 A Multidimensional Extended Overlap-Add and -Save Method for Arbitrary Sampling Lattice Alteration

    MURAMATSU Shogo, KIYA Hitoshi

    電子情報通信学会秋季大会講演論文集  1994.9 

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Works

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Awards

  • ISS査読功労賞

    2024.6   電子情報通信学会 情報・システムソサイエティ  

    村松 正吾

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  • 貢献賞(会議運営)

    2023.9   電子情報通信学会 基礎・境界ソサイエティ   第37回信号処理シンポジウムの運営に対する貢献

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  • SIP特別功労賞

    2022.12   電子情報通信学会 基礎・境界ソサイエティ 信号処理研究専門委員会  

    村松正吾

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  • Certificate of Appreciation for serving as a special session co-chair in APSIPA-ASC 2021

    2021.12   Asia Pacific Signal and Information Processing Association (APSIPA)  

    Shogo MURAMATSU

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  • Distinguished Lecturer Program Certificate

    2020.12   APSIPA  

    Shogo MURAMATSU

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  • 編集活動貢献賞

    2019.9   電子情報通信学会 基礎・境界ソサイエティ  

    村松 正吾

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  • 2018 Chapter Certification Appreciation Certificate

    2018.9   IEEE Signal Processing Society  

    村松 正吾

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  • SIP特別功労賞

    2015.11   電子情報通信学会 基礎・境界ソサイエティ 信号処理研究専門委員会  

    村松 正吾

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  • Senior Member

    2014.4   IEEE  

    村松 正吾

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  • ソサイエティ功労感謝状(英文論文誌の編集活動における貢献)

    2011.9   電子情報通信学会 基礎・境界ソサイエティ  

    村松 正吾

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  • シニア会員

    2011.5   電子情報通信学会  

    村松 正吾

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  • 編集活動感謝状

    2010.9   電子情報通信学会 基礎・境界ソサイエティ  

    村松 正吾

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  • 編集活動感謝状

    2006.12   電子情報通信学会 基礎・境界ソサイエティ  

    村松 正吾

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  • 第18回回路とシステム軽井沢ワークショップ奨励賞受賞

    2005.11   電子情報通信学会   可変係数デインタレーサバンクのための相互参照型パラメータ決定法

    村松 正吾

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Research Projects

  • Challenges in data-driven integrated water level control of river channel networks: dynamics modeling in directed graph structures

    Grant number:24K21314

    2024.7 - 2027.3

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  • Locally Structured Unitary Networks and Tangent Space Learning for Dynamic Systems Modeling

    Grant number:22H00512

    2022.4 - 2026.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Research category:Grant-in-Aid for Scientific Research (A)

    Awarding organization:Japan Society for the Promotion of Science

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    Authorship:Principal investigator 

    Grant amount:\42510000 ( Direct Cost: \32700000 、 Indirect Cost:\9810000 )

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  • Embedded Image Restoration Techniques for Edge Computing

    Grant number:JPJSBP120208804

    2020.4 - 2022.3

    System name:Bilateral Programs

    Awarding organization:Japan Society for the Promotion of Science

    MURAMATSU Shogo, JEON Gwanggil

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  • Data-driven Active River Channel Control for Maintenance and Recovery of Stream Integrity

    Grant number:19K22026

    2019.6 - 2021.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)

    Research category:Grant-in-Aid for Challenging Research (Exploratory)

    Awarding organization:Japan Society for the Promotion of Science

    Muramatsu Shogo

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    Grant amount:\6370000 ( Direct Cost: \4900000 、 Indirect Cost:\1470000 )

    In this study, we proposed a river channel active control method to maintain and restore river channel integrity. A cyber-physical system (CPS) for controlling river channel dynamics is proposed, and a data-driven algorithm for deriving the time evolution equation of river bed movement and estimating the channel dynamics is developed as a useful technique for the CPS construction. We also proposed a method for predicting the water level distribution in the whole river system.
    A prototype CPS was constructed to control the optimal placement of groynes to maintain a healthy channel, and a series of processes from sensing to actuation was realized.
    We made 7 presentations at domestic conferences and 2 presentations at international conferences as research results.

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  • Structured Convolutional Networks for High-dimensional Signal Restoration

    Grant number:19H04135

    2019.4 - 2022.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    MURAMATSU Shogo

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\17680000 ( Direct Cost: \13600000 、 Indirect Cost:\4080000 )

    The purpose of this study was to clarify effective structural constraints on generative models of high-dimensional signals in order to improve the efficiency and performance of high-dimensional signal restoration. New structured dictionaries and structured convolutional networks were constructed, and efforts were made to improve the efficiency of complex extension, parallelization, hierarchization, multilayering, learning design, and restoration algorithms. We evaluated the effectiveness of the proposed restoration process on a variety of real data, including volumetric data, complex image data, and high-dimensional time series data.
    As research results, we made 21 presentations at domestic conferences, 16 presentations at international conferences, and published 3 papers in academic journals.

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  • Learning-Based Design and Implementation of Non-separable Oversampled Lapped Transforms for Multidimensional Signal Restoration

    Grant number:26420347

    2014.4 - 2017.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Muramatsu Shogo

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\5070000 ( Direct Cost: \3900000 、 Indirect Cost:\1170000 )

    In this project, we proposed a multidimensional transform with the redundant, non-separable, overlapped, symmetric, compact-supported and tight property. We also conducted the theoretical analysis, design, implementation, and application development. First, we extended the existing non-separable lapped orthogonal transform to redundant configuration and clarify its properties. As well, we proposed an example-based learning design method and showed its effectiveness. In addition, we showed the possibility of real-time processing through GPGPU/FPGA implementation. Besides, it was applied to image/volumetric data restoration and validity was confirmed. We also extended the proposed transform to complex coefficient type as preparation for application development to complex image restoration processing.

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  • Design and Real-Time Implementation of 2-D Orthogonal Transforms with Trend Vanishing Moments for High-Functioning Image Representation

    Grant number:23560443

    2011 - 2013

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    MURAMATSU Shogo

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    Grant amount:\5330000 ( Direct Cost: \4100000 、 Indirect Cost:\1230000 )

    In this project, 2-D orthogonal transforms with trend vanishing moments were proposed, and then the theoretical analysis, design, implementation and applications were studied. First of all, a property of 2-D signal transforms, trend vanishing moment (TVM), was defined and the relation to the annihilation property for trend surfaces was clarified. Then, the concrete design and implementation methods were proposed for 2-D signal transforms with TVMs and the directional design and real-time implementation were realized. In addition, the significance of the proposed methods was verified through the application to image restoration. The extension to the oversampled case was also investigated.

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  • 検索・編集を目的としたインタレース映像のスケーラブル符号化に関する研究

    Grant number:14750283

    2002 - 2003

    System name:科学研究費助成事業 若手研究(B)

    Research category:若手研究(B)

    Awarding organization:日本学術振興会

    村松 正吾

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    Grant amount:\3500000 ( Direct Cost: \3500000 )

    本課題は,検索・編集に適したインタレース映像情報の符号化において,その利用形態の違いによって生じる諸問題を統一の符号において解決することを目的とし,この問題を解決するために可逆デインタレース処理という独特な技術の適用を検討し,評価・改善を行っている.
    1 今年度の研究概要
    今年度は,可逆デインタレース処理と画像符号化国際標準JPEG2000を組み合わせて利用した場合における性能改善および効果的実装の具体化を中心に行なった.性能改善については,画像の局所的性質に適応させた可変係数型処理の制御パラメータ情報の埋め込み法やロスレス符号化実装の検討を新たに行った.効果的実装については,JPEG2000で採用されているウェーブレット変換のリフティング実装への組み込みに加え,制御パラメータの検出器についても提案・検討し,ハードウェア記述言語によるモデル化およびその評価を行った.
    2 今年度の研究成果
    昨年度は,可変係数型および周波数重み補正法が有効であることを確認し,ちらつきの抑圧性能を維持しつつ,復元画像の画質向上を達成できた.今年度は,特に制御パラメータ情報の削減,およびその伝送について検討し,水平間引き処理によるパラメータ削減法を提案,有効性を確認した.一方,JPEG2000と共にロスレス/ロッシー符号化へも適用可能であることを示し,その有効性を確認した.また,実装面においても新たな制御パラメータ情報の検出器が現実的な規模で十分に実時間処理が可能となることをシミュレーション等により確認した.
    3 今後の研究の展開
    画質改善および効果的実装について更なる検討を続ける.可変係数型の場合,制御パラメータ情報の扱いに関しては工夫の余地がある.また,提案手法のFPGAなどの実機への実装,実時間処理による主観評価パラメータなどの最適化に検討の余地がある.フレーム内符号化に限らずイントラ符号化への応用も検討を進める.

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  • ウェーブレット変換に適した信号処理プロセッサの構成に関する研究

    Grant number:12750322

    2000 - 2001

    System name:科学研究費助成事業 奨励研究(A)

    Research category:奨励研究(A)

    Awarding organization:日本学術振興会

    村松 正吾

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    Grant amount:\2200000 ( Direct Cost: \2200000 )

    本課題は、画像符号化を中心に実用化が進んでいるウェーブレット変換の信号処理プロセッサ(DSP)上での効果的な実現を目的とし、アルゴリズムとアーキテクチャの両面から基礎的な検討と評価を行った。
    1 今年度の研究概要
    今年度は、DSPモデル上でのウェーブレット変換の効果的実装の検討を行った。また、画像符号化国際標準JPEG2000で採用されているウェーブレット変換のリフティング実装について検討を行った。リフティング実装については、専用モジュールとして一つの累積加算器からなるアーキテクチャを提案し、ハードウェア記述言語によるモデル化およびその評価を行った。そして、DSPに実装するための手掛かりを得た。
    2 今年度の研究成果
    昨年度の研究の結果、アドレス生成器の役割が重要であり、積和演算器の少ないDSPでメモリアクセスを低減化するためには、積和演算の繰り返しの際に2回毎のインクリメント機能が必要であることを確認している。今年度は、多段のウェーブレット変換に対しては2のべき乗毎のインクリメント機能が有効であることを確認した。また、リフティング実装を少数の累積加算器で実現するアーキテクチャの検討を行い、アドレス生成について周期的ではあるが若干複雑な状態遷移が必要となることを確認した。
    3 今後の研究の展開
    リフティング実装について更なる検討を続ける。アドレス生成に関しては工夫の余地が残されている。ただし、研究開始当初では、汎用プロセッサに対する期待が大きかったが、技術の進歩によりFPGAのような再構成可能プロセッサが実機に組み込まれることが多くなった。したがって、並列分散処理を念頭においた専用モジュールとしての実装に重点を置く必要がある。JPEG2000の規格が決まり、システム全体からウェーブレット変換への要求が明確になった。速度よりも面積に対する要求が強いため、本研究の成果を活かせると考えている。

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  • 視るを洗練:計測指向モデリングによるミューオンイメージングデータ解析

    Grant number:25H01296

    2025.4 - 2030.3

    System name:科学研究費助成事業

    Research category:学術変革領域研究(A)

    Awarding organization:日本学術振興会

    小野 峻佑, 村松 正吾

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    Grant amount:\104390000 ( Direct Cost: \80300000 、 Indirect Cost:\24090000 )

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  • 洪水時の観測ビッグデータに基づく自然由来河道の安定機構の解明と河道設計指標の特定

    Grant number:24H00365

    2024.4 - 2028.3

    System name:科学研究費助成事業

    Research category:基盤研究(A)

    Awarding organization:日本学術振興会

    安田 浩保, 田中一成, 村松正吾, 早坂圭司

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    Authorship:Coinvestigator(s) 

    Grant amount:\48360000 ( Direct Cost: \37200000 、 Indirect Cost:\11160000 )

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  • 光変形する微小液滴の動的ネットワーク化による学習型・局所振動センシング技術の創生

    Grant number:24K00896

    2024.4 - 2027.3

    System name:科学研究費助成事業

    Research category:基盤研究(B)

    Awarding organization:日本学術振興会

    大平 泰生, 村松 正吾, 新保 一成

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    Authorship:Coinvestigator(s) 

    Grant amount:\18330000 ( Direct Cost: \14100000 、 Indirect Cost:\4230000 )

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  • Functional optimization and establishment of comprehensive evaluation of membrane-permeable aptamers for drug development using AI technology

    Grant number:22H02917

    2022.4 - 2025.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

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    Grant amount:\17550000 ( Direct Cost: \13500000 、 Indirect Cost:\4050000 )

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  • 自然法則に基づく安定性河道とデータ駆動型の河道の予知保全法による河川の多重性向上

    Grant number:21H04596

    2021.4 - 2025.3

    System name:科学研究費助成事業 基盤研究(A)

    Research category:基盤研究(A)

    Awarding organization:日本学術振興会

    安田 浩保, 大竹 雄,村松 正吾, 早坂 圭司

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    Authorship:Coinvestigator(s) 

    Grant amount:\41990000 ( Direct Cost: \32300000 、 Indirect Cost:\9690000 )

    扇状地前後に位置する河川では、底面に交互砂州と呼ばれる起伏形状が自発的かつ例外なく形成される。交互砂州が発達した河川における平水時の澪筋は、導波管現象のように両岸の間を対角線状に反射する形状となる。本研究では、まず、交互砂州が発達する河川における普遍的な幾何学的形状の探索を行い、その中で自発的に形成される澪筋が形状安定性に優れることに着目し、その形状を定量化した。次に、実河川で見られた自発的澪筋の川幅を初期に与える模型実験と実河川のそれぞれでを行い、その形状安定性は非常に優れることを実証した。また、初期の底面を平坦とし、そこから交互砂州が徐々に形成される過程について高い空間分解能かつ高頻度に測定した。これは、交互砂州の形成の端緒の測定の初めての成功と言え、今後、交互砂州の形成の機構解明とそれに基づく制御への応用が期待できる。ただし、2021年度の研究において、移動床水理の時間発展のアンサンブル計算を行ったところ、移動床水理にはカオス性を内在する結果が得られた。
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    本研究では、本研究グループが独自に開発したStream Tomography: STという模型実験における移動床水理の高い空間分解能かつ高頻度な測定法の拡張を行った。具体的には、STにより高い分解能かつ高頻度に取得される水面と底面の観測ビッグデータの数理的な処理により、流れの支配方程式を用いず、これらの測定値と同等の空間分解能で流速の推定を可能とした。上記の通り、移動床水理はカオス性を内在する結果が得られ、モデル駆動型解析による長期予測は得策ではないことが示唆された。拡張されたSTにより得られる観測ビッグデータのデータ駆動型解析によりモデル駆動型解析の代替えや補強が可能となる結果も得つつある。具体的には、STの観測ビッグデータを特異値分解することで、河川の物理的な状態を把握できる可能性があることがわかってきた。

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  • Development of flood monitoring system using microwave radar with data driven signal processing

    Grant number:20K20543

    2020.7 - 2023.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Pioneering)

    Research category:Grant-in-Aid for Challenging Research (Pioneering)

    Awarding organization:Japan Society for the Promotion of Science

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    Grant amount:\25480000 ( Direct Cost: \19600000 、 Indirect Cost:\5880000 )

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  • High-resolution MW-MIMO Imaging Radar for Life Support Applications

    Grant number:20H02147

    2020.4 - 2023.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

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    Grant amount:\17940000 ( Direct Cost: \13800000 、 Indirect Cost:\4140000 )

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  • Development of optical tomographic imaging system for in-vivo nano-vibration measurement of whole 3D structure in biological tissue

    Grant number:19H02151

    2019.4 - 2022.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    Choi Samuel

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    Grant amount:\17940000 ( Direct Cost: \13800000 、 Indirect Cost:\4140000 )

    In this study, we aimed to develop an optical tomography imaging system oriented to nano-vibration measurement of the entire 3D structure at the biological tissue. First, we proposed the principle of a heterodyne coherence microscope that can measure the vibration distribution along with a three-dimensional tomographic scan, and demonstrated its usefulness through validation experiments. Next, we constructed a system using a DD-MZM comb generator and proposed a method to realize ultra high-speed measurement at a scan rate of 20 MHz, which enables transient measurement of the vibration state as well as depth profile. Furthermore, by applying the same light source to a spatial interference microscope, it was shown that 3D measurements with nano-order precision over a wide depth range of several hundred micrometers to millimeters are possible. The possibility of the proposed methodwas demonstrated.

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  • Human motion detection and estimation by using Millimeter-wave motion sensing MIMO radar

    Grant number:17H03261

    2017.4 - 2020.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    Yamada Hiroyoshi

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    Grant type:Competitive

    Grant amount:\16250000 ( Direct Cost: \12500000 、 Indirect Cost:\3750000 )

    Main objective in this research is a development high resolution MIMO for human motion observation radar and performance improvement for target recognition. To realize this objective, we have developed a new virtual array technique for the MIMO radar by using minimum redundancy arrays both in transmitting and receiving array. This technique is effective for incoherent scattered radar echoes such as reflected signals by diversely motions of persons. Validity of this technique have demonstrated by indoor human detection experiments. In addition, a new Doppler frequency estimation algorithm has proposed here. It can extend the maximum observable Doppler frequency, which enable us easy to apply MIMO radars to many applications. Furthermore target recognition by using Doppler-spread has considered. It is one of the promising parameters for target recognition and motion classification. Experimental results of this algorithm as well as CNN have provided in this research.

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  • 非分離冗長重複変換の事例設計および映像復元応用の低消費電力実現に関する研究

    2017.4 - 2018.3

    System name:試験研究費助成

    Awarding organization:財団法人 内田エネルギー科学振興財団

    村松 正吾

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    Authorship:Principal investigator  Grant type:Competitive

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  • 3D optical coherence tomography using frequency-tunable broadband optical comb for biological measurement

    Grant number:16H03164

    2016.4 - 2019.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    CHOI SAMUEL, Hibino Hiroshi, Nin Fumiaki

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    Grant type:Competitive

    Grant amount:\17940000 ( Direct Cost: \13800000 、 Indirect Cost:\4140000 )

    In this research, we have developed an "en-face multi-frequency swept optical coherence microscopic vibrometer” for high-precision tomographic imaging and visualization of living biological tissues by medical engineering collaboration. An ultra-broadband light source (Supercontinuum) was introduced as a light source with an en-face imaging optical system utilizing a multi-wavelength scanning interference measurement method was produced. We achieved depth resolution of 2.7 μm in tomographic imaging with resolution of 3.5 μm in x-y axis of the microscopic image. Furthermore, we could detect the vibration of sensory epithelium of a living guinea pig with a sensitivity of about 10 nm.
    In addition, we examined the validity of the "optical comb" light source that can perform multi-wavelength scanning all-electronically. This novel light source showed that it is possible to visualize a faster tomographic image and vibration distribution more accurately.

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  • Real-time full-field OCT using static swept source and wavelet transform

    Grant number:16K04973

    2016.4 - 2019.3

    System name:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Suzuki Takamasa

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    Grant type:Competitive

    Grant amount:\4680000 ( Direct Cost: \3600000 、 Indirect Cost:\1080000 )

    Recently, optical coherence tomography has high demand for medical diagnosis. In this study, we developed low-cost and high-performance swept source (SS) by using acousto-optic deflector. Characteristics, such as wavelength scanning range, response time, optical power, have been improved in this SS. Moreover, OCT was configured with this SS. We confirmed that accurate image restoration was realized by using continuous wavelet transform instead of Fourier transform.

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  • 伝統的工芸品の世界販売戦略を支援するためのバーチャルショウケースの研究開発

    2016.4 - 2018.3

    System name:戦略的情報通信研究開発推進事業(SCOPE) フェーズⅡ

    Awarding organization:総務省

    阿部 淑人

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    Grant type:Competitive

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  • 伝統的工芸品の世界販売戦略を支援するためのバーチャルショウケースの研究開発

    2015.4 - 2016.3

    System name:戦略的情報通信研究開発推進事業(SCOPE) フェーズI

    Awarding organization:総務省

    阿部 淑人

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    Grant type:Competitive

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  • クロスネットワークを機軸とした地域間データ共有機能を有する金属加工形状検証システムの研究開発

    2010.4 - 2012.3

    System name:戦略的情報通信研究開発推進事業(SCOPE)

    Awarding organization:総務省

    鈴木孝昌

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    Grant type:Competitive

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  • 画像解析のための指向性重複直交変換の低消費電力実現に関する研究

    2010.4 - 2011.3

    System name:試験研究費助成

    Awarding organization:財団法人 内田エネルギー科学振興財団

    村松 正吾

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    Authorship:Principal investigator  Grant type:Competitive

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  • 人と環境にやさしいインテリジェント・ ビデオセンサー・ネットワークの構築

    2006.4 - 2008.3

    System name:河川設備基金助成事業

    Awarding organization:財団法人 河川環境管理財団

    岩橋 政宏

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    Grant type:Competitive

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  • インタレース映像に対応したスケーラブル映像符号化システムの研究開発

    2005.4 - 2006.3

    Awarding organization:財団法人ユニオンツール育英奨学会

    村松 正吾

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    Authorship:Principal investigator  Grant type:Competitive

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Teaching Experience

  • 電子情報通信実験IV

    2024
    Institution name:新潟大学

  • 電子情報通信実験II

    2023
    Institution name:新潟大学

  • 創造研究プロジェクトI

    2022
    Institution name:新潟大学

  • 創造研究プロジェクトII

    2022
    Institution name:新潟大学

  • リフレクションデザインIII

    2021
    -
    2023
    Institution name:新潟大学

  • リフレクションデザインII

    2021
    -
    2023
    Institution name:新潟大学

  • 領域概説 E (工学)

    2021
    -
    2023
    Institution name:新潟大学

  • プログラミング基礎II

    2021
    -
    2022
    Institution name:新潟大学

  • 自然科学総論III

    2021
    Institution name:新潟大学

  • 創造プロジェクトI

    2021
    Institution name:新潟大学

  • データサイエンス実践 C

    2021
    Institution name:新潟大学

  • 創造プロジェクトII

    2021
    Institution name:新潟大学

  • 先端科学技術総論

    2021
    Institution name:新潟大学

  • 電子情報通信設計製図

    2020
    Institution name:新潟大学

  • 論文輪講I

    2020
    -
    2023
    Institution name:新潟大学

  • 論文輪講II

    2020
    -
    2023
    Institution name:新潟大学

  • 電子情報通信実験IVA

    2020
    -
    2023
    Institution name:新潟大学

  • 電子情報通信実験IVB

    2020
    -
    2021
    Institution name:新潟大学

  • 工学リテラシー入門(情報電子分野)

    2019
    Institution name:新潟大学

  • 電子情報通信実験IIB

    2019
    -
    2022
    Institution name:新潟大学

  • 電子情報通信実験IIA

    2019
    -
    2022
    Institution name:新潟大学

  • プログラミングBII

    2018
    Institution name:新潟大学

  • プログラミングBI

    2018
    Institution name:新潟大学

  • 電子情報通信実験IB

    2018
    -
    2020
    Institution name:新潟大学

  • 電子情報通信実験IA

    2018
    -
    2020
    Institution name:新潟大学

  • 電子情報通信概論

    2017
    Institution name:新潟大学

  • 電気電子工学研究発表(外部発表)

    2014
    -
    2015
    Institution name:新潟大学

  • 電気情報工学特定研究Ⅱ

    2013
    Institution name:新潟大学

  • 中間発表

    2013
    Institution name:新潟大学

  • 技術英語入門

    2013
    Institution name:新潟大学

  • 電気電子工学文献詳読Ⅰ

    2012
    -
    2015
    Institution name:新潟大学

  • 電気電子工学特定研究Ⅱ

    2012
    -
    2015
    Institution name:新潟大学

  • 電気電子工学セミナーⅠ

    2012
    -
    2015
    Institution name:新潟大学

  • 電気電子工学セミナーⅡ

    2012
    -
    2015
    Institution name:新潟大学

  • 電気電子工学特定研究Ⅰ

    2012
    -
    2015
    Institution name:新潟大学

  • 電気電子工学文献詳読Ⅱ

    2012
    -
    2015
    Institution name:新潟大学

  • 電気電子工学研究発表演習(中間発表)

    2012
    -
    2015
    Institution name:新潟大学

  • 電気情報工学特定研究Ⅲ

    2012
    -
    2014
    Institution name:新潟大学

  • 電気電子工学研究発表演習(外部発表)

    2012
    -
    2013
    Institution name:新潟大学

  • 電気電子工学コース演習

    2012
    Institution name:新潟大学

  • 電気情報工学特定研究Ⅰ

    2012
    Institution name:新潟大学

  • 電気電子設計製図

    2010
    -
    2018
    Institution name:新潟大学

  • 電気電子創造設計

    2010
    -
    2016
    Institution name:新潟大学

  • 卒業研修

    2009
    Institution name:新潟大学

  • 工学リテラシー入門(電気電子工学科)

    2009
    -
    2016
    Institution name:新潟大学

  • プログラミング演習

    2008
    -
    2017
    Institution name:新潟大学

  • スタディスキルズ(電気電子工学)

    2008
    Institution name:新潟大学

  • 多次元信号処理論

    2007
    Institution name:新潟大学

  • 画像情報工学

    2007
    Institution name:新潟大学

  • 卒業研究

    2007
    Institution name:新潟大学

  • 画像処理特論

    2007
    Institution name:新潟大学

  • 論文輪講

    2007
    -
    2019
    Institution name:新潟大学

  • 電気電子工学実験IV

    2007
    -
    2018
    Institution name:新潟大学

  • 電気電子工学実験III

    2007
    -
    2018
    Institution name:新潟大学

  • 電気電子工学実験I

    2007
    -
    2017
    Institution name:新潟大学

  • 電気電子工学実験II

    2007
    -
    2017
    Institution name:新潟大学

  • プログラミング

    2007
    -
    2017
    Institution name:新潟大学

  • エレクトロニクスへの招待

    2007
    -
    2016
    Institution name:新潟大学

  • 電気電子演習

    2007
    -
    2009
    Institution name:新潟大学

  • プログラミング基礎演習

    2007
    -
    2009
    Institution name:新潟大学

  • 卒業基礎研究

    2007
    -
    2008
    Institution name:新潟大学

  • プログラミング実習

    2007
    Institution name:新潟大学

▶ display all

 

Social Activities

  • 力学系機械学習の新潮流 -治水への展開-

    Role(s): Lecturer

    ARCEプロジェクト  第6回土木科学シンポジウム  2023.11

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  • スマホでモノのインターネット(IoT)を体験しよう!

    Role(s): Lecturer

    新潟大学創生学部  第2回オンライン基礎ゼミ体験  2022.12

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    Audience: High school students

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  • スパースモデリングとその光干渉断層撮像への応用

    Role(s): Lecturer

    新潟大学  大学生・高校生向けシンポジウム「データ活用で未来を創る 企業・大学の事例紹介」  2022.12

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  • Society 5.0における河川の自律制御~河道から流域治水まで~

    Role(s): Lecturer

    ARCEプロジェクト  第5回土木科学シンポジウム  2022.11

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  • 河道能動制御のCPS実験~自制する河川の創出~

    Role(s): Lecturer

    ARCEプロジェクト  第4回土木科学シンポジウム  2021.11

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  • 近代日本の列島改造 ~工人(エンジニア)たちの信濃川戦争~

    Role(s): Appearance

    特定非営利活動法人にいがたデジタルコンテンツ推進協議会  NST新潟総合テレビ  2021.8

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  • 河道能動制御のプロトタイプシステム構築~データ駆動型の治水をめざして~

    Role(s): Advisor

    ARCEプロジェクト  第3回土木科学シンポジウム  2020.11

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  • 面接授業「画像処理の基礎」

    Role(s): Lecturer

    放送大学新潟学習センター  2019.12

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  • 河道能動制御のモデルベース開発~データ駆動型解析がみつける未来~

    Role(s): Lecturer

    ARCEプロジェクト  第2回土木科学シンポジウム  2019.11

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  • シミュレーションで学ぶ画像処理技術 ~圧縮・ノイズ除去・復元~

    Role(s): Lecturer

    独立行政法人高齢・障害・求職者雇用支援機構 高度ポリテクセンター  2019.7

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    Audience: General

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  • ヒューマンライブラリー

    Role(s): Lecturer

    新潟市立坂井東小学校  2018.12

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    Audience: Schoolchildren, Guardians

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  • データ駆動型解析とは?~河川デジタルツイン構想~

    Role(s): Lecturer

    ARCEプロジェクト  第1回土木科学シンポジウム  2018.11

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  • 多次元信号・画像処理に関する研究

    Role(s): Lecturer

    新大産学交流フェスタ2018  2018.11

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  • シミュレーションで学ぶ画像処理技術~圧縮・ノイズ除去・復元~

    Role(s): Lecturer

    高度ポリテクセンター  2018.7

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  • 次世代センシングとネットワーク利用

    Role(s): Lecturer

    新潟大学産学連携協力会  研究シーズプレゼンテーション  2018.4

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  • 伝統的工芸品の世界販売戦略を支援するためのバーチャルショウケースの研究開発

    Role(s): Lecturer

    総務省 信越総合通信局  地域ICT先端技術セミナー  2018.3

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  • ARCE(Autonomous River Control Engineering)プロジェクト

    Role(s): Lecturer

    新潟大学  2017年度ビッグデータアクティベーション研究会報告会  2018.3

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  • 次世代センシングとネットワーク利用

    Role(s): Lecturer

    新潟地方化学工学懇話会 第146回講演会  2017.12

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  • MATLABで開発するカメラ搭載Raspberry Pi Zeroローバー

    Role(s): Lecturer

    MATLAB EXPO 2017 | Japan  2017.10

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  • シミュレーションによる画像・映像処理技術

    Role(s): Lecturer

    高度ポリテクセンター  2017.6

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  • IoT/AIを用いた次世代災害センシング

    Role(s): Lecturer

    新潟大学防減災シンポジウム  2017.1

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  • ヒューマンライブラリー

    Role(s): Lecturer

    新潟市立坂井東小学校  2016.11

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  • 遊びながら学ぶMATLABプログラミング

    Role(s): Panelist

    第31回信号処理シンポジウム・プログラミングセッション  2016.11

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  • ヒューマンライブラリー

    Role(s): Lecturer

    新潟市立坂井東小学校  2015.12

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    Audience: Schoolchildren, Guardians

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  • シミュレーションによる画像・映像処理技術(多次元信号処理)

    Role(s): Lecturer

    高度ポリテクセンター  2014.6

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  • Developing Video Denoising Algorithms with MATLAB and Simulink for Implementation on BeagleBoard Hardware

    Role(s): Informant

    MathWorks  Technical Articles and Newsletters  2014.6

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  • 信号処理でつながる学科・学年横断型実践教育

    Role(s): Lecturer

    第28回信号処理シンポジウムMATLAB研究開発事例講演  2013.11

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  • 最新機能を使った信号処理・画像処理の高度な研究・教育への応用

    Role(s): Lecturer

    MATLAB 特別Webセミナー  2013.9

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  • シミュレーションによる画像・映像処理技術(多次元信号処理)

    Role(s): Lecturer

    高度ポリテクセンター  2013.6

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  • ビジョン処理で使いこなすMATLAB CoderとSystem object

    Role(s): Lecturer

    MATLAB EXPO 2012 | Japan  2012.10

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  • シミュレーションによる画像・映像処理技術(多次元信号処理)

    Role(s): Lecturer

    高度ポリテクセンター  2012.6

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  • 多次元信号処理の基礎と画像処理のための二次元変換技術

    Role(s): Lecturer

    電子情報通信学会中国支部  学生向け講演会  2011.9

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  • 夢追い人との交流会

    Role(s): Lecturer

    新潟市立坂井輪中学校  2011.6

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    Audience: Junior students

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  • シミュレーションによる画像・映像処理技術(多次元信号処理)

    Role(s): Lecturer

    高度ポリテクセンター  2011.6

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  • シミュレーションで学ぶ画像処理技術

    Role(s): Lecturer

    高度ポリテクセンター  2010.6

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  • シミュレーションで学ぶ画像処理技術

    Role(s): Lecturer

    高度ポリテクセンター  2009.6

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  • MATLABによるモデリング実践入門講座

    Role(s): Lecturer

    日本テクノセンター  2009.3

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  • 入門画像・映像信号処理とMATLABシミュレーション

    Role(s): Lecturer

    トリケップス  2009.1

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  • 画像処理アルゴリズム開発におけるMATLABの活用法

    Role(s): Lecturer

    DSP&FPGAデザインワークショップ2008 テクノロジ・セミナー  2008.12

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  • シミュレーションで学ぶ画像処理技術

    Role(s): Lecturer

    高度ポリテクセンター  2008.6

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  • MATLABによるモデリング実践入門講座

    Role(s): Lecturer

    日本テクノセンター  2008.3

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  • MATLABによる画像&映像信号処理実践入門講座

    Role(s): Lecturer

    日本テクノセンター  2007.8

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  • シミュレーションで学ぶ画像処理技術

    Role(s): Lecturer

    高度ポリテクセンター  2007.6

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  • MATLABで学ぶ画像・映像処理技術

    Role(s): Lecturer

    トリケップス  2007.5

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  • 画像・映像処理におけるMATLAB利用のポイント

    Role(s): Lecturer

    MATLAB EXPO2005  2005.12

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