石川 正俊 ISHIKAWA Masatoshi

ID:1000040212857

東京大学 大学院情報理工学系研究科 (2017年 CiNii収録論文より)

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Articles:  1-20 of 349

  • High-speed and High-accuracy Page Segmentation for Book Digitization based on 3D Sensing  [in Japanese]

    YEO Chaerim , WATANABE Yoshihiro , ISHIKAWA Masatoshi

    In this paper, we propose a new method to segment book shape represented as 3D point cloud into each page as an elemental technologies of book digitization based on 3D sensing. First, we focus on that …

    Journal of the Japan Society for Precision Engineering 83(12), 1192-1200, 2017

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  • High-precision Calibration Method for Three-dimensional Measurement of a Mirror-based High-speed Optical Axis Controller  [in Japanese]

    Sueishi Tomohiro , Oku Hiromasa , Ishikawa Masatoshi

    二枚の回転ミラーを駆動する方式の非常に高速な光軸制御系は,従来の電動雲台式と比べ運動物体の継続的高解像度撮影が可能で,様々な応用が期待される.しかし3次元計測への応用の場合,浅い被写界深度と光軸変更の機械的構造の点から望遠な状況でのミラー式光軸制御系の高精度な校正が困難であった.本論文では駆動鏡面式高速光軸制御系の高精度な校正に向けて,同軸落射照明と再帰性反射校正器具による再帰照明系を用いた被写界 …

    The Journal of The Institute of Image Information and Television Engineers 71(5), J162-J171, 2017

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  • High-speed 3D Sensing with Three-view Geometry Using a Segmented Pattern  [in Japanese]

    TABATA Satoshi , NOGUCHI Shohei , WATANABE Yoshihiro , ISHIKAWA Masatoshi

    High-speed vision technology in which not just image capturing and recording but also image processing are executed simultaneously at high frame rates, exceeding video rates (30Hz), has recently been …

    Transactions of the Society of Instrument and Control Engineers 52(3), 141-151, 2016

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  • Immersive 3D Environment by Floating Display and High-speed Gesture UI Integration  [in Japanese]

    YASUI Masahiko , SAKTI ALVISSALIM M. , YAMAMOTO Hirotsugu , ISHIKAWA Masatoshi

    Recently, the importance of 3D interaction is increasing. We realize immersive 3D environment based on eyeware-free 3D image and high-speed hand gesture interface. For the aerial image, we use a displ …

    Transactions of the Society of Instrument and Control Engineers 52(3), 134-140, 2016

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  • High-Speed Real-Time Depth Estimation by Projecting Structured Light Field  [in Japanese]

    Matsumoto Takuya , Oku Hiromasa , Ishikawa Masatoshi

    Real-time depth estimation is used in many applications, such as motion capture and human-computer interfaces. However, conventional depth estimation algorithms, including stereo matching or Depth fro …

    Journal of the Robotics Society of Japan 34(1), 48-55, 2016

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  • Development of High-speed Bipedal Running Robot System (ACHIRES)  [in Japanese]

    Tamada Tomoki , Ikarashi Wataru , Yoneyama Daiki , Tanaka Kazuhito , Yamakawa Yuji , Senoo Taku , Ishikawa Masatoshi

    This paper presents a new method of realizing high-speed bipedal running with a high-speed robot using high-speed visual feedback. First, to achieve high-speed running with simple control, we develope …

    Journal of the Robotics Society of Japan 33(7), 482-489, 2015

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  • Proposal and fundamental study of a display method relying on afterimage and a flying tracked object as support for projection  [in Japanese]

    Yasui Masahiko , Cassinelli Alvaro , Okumura Kohei , Oku Hiromasa , Ishikawa Masatoshi

    A new method to display information based on the afterimage using moving object is proposed. A laser light spot is projected on a fast moving object and draws pattern so that a human vision could reco …

    Transactions of the Virtual Reality Society of Japan 20(1), 55-64, 2015

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  • Networked High-Framerate Vision System for High-Speed Object Tracking  [in Japanese]

    NODA Akihito , YAMAKAWA Yuji , ISHIKAWA Masatoshi

    The paper presents a networked vision system for tracking high-speed objects traveling across multiple cameras. An example of the application of the system is to continuously track the vehicles from t …

    IEICE technical report 113(388), 77-80, 2014-01-23

  • Robot Application of High-speed Vision  [in Japanese]

    Senoo Taku , Yamakawa Yuji , Ishikawa Masatoshi

    Journal of the Robotics Society of Japan 32(9), 769-773, 2014

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  • Recent Development and Applications of High-Speed Vision  [in Japanese]

    Namiki Akio , Ishikawa Masatoshi

    Journal of the Robotics Society of Japan 32(9), 766-768, 2014

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  • High-speed Dynamic Information Environment with Airborne Ultrasound Tactile Display-Camera System and The Calibration Method(<Special Issue>Mixed Reality)  [in Japanese]

    Sueishi Tomohiro , Hasegawa Keisuke , Okumura Kohei , Oku Hiromasa , Shinoda Hiroyuki , Ishikawa Masatoshi

    In this paper, we propose an image and tactile presentation system for quickly moving objects, high-speed dynamic information environment, and a calibration method between a camera and Airborne Ultras …

    Transactions of the Virtual Reality Society of Japan 19(2), 173-183, 2014

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  • High-Speed Document Digitization System with Automatic Page Turner Machine  [in Japanese]

    NOGUCHI Shohei , TAMEI Miho , YAMADA Masahiro , WATANABE Yoshihiro , ISHIKAWA Masatoshi

    書籍のページを自動で高速にめくりながら,高精細な書籍画像を取り込む新たな書籍電子化システムを提案する.本システムは,適応的撮像と自動書籍めくり機能の二つの特徴的な機能を備えている.特に,適応的撮像は,高速性と高精細の両立を図るうえで重要な役割を果たしている.この適応的撮像を実現するためには,ページの状態を高速かつ正確に捉える必要がある.そこで,書籍紙面の形状を認識する手法を新たに提案する.本論文で …

    The IEICE transactions on information and systems (Japanese edition) 96(10), 2590-2602, 2013-10

  • Image Measurement of a High-speed Flying Object Using the High-speed Gaze Controller  [in Japanese]

    OKUMURA Kohei , ISHII Masato , TATSUMI Eri , OKU Hiromasa , ISHIKAWA Masatoshi

    In spite of high demands in a lot of industrial fields, it is viewed as difficult to capture a stuff flying at the speed of hundreds [m/s] order same as acoustic velocity. A high-frame-rate camera (&a …

    Transactions of the Society of Instrument and Control Engineers 49(9), 855-864, 2013-09-30

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  • Automatic Page Turner Machine for High-speed Book Digitization  [in Japanese]

    TAMEI Miho , YAMADA Masahiro , WATANABE Yoshihiro , ISHIKAWA Masatoshi

    In recent years, there has been an increasing demand to digitize a huge number of books. A promising new approach for meeting this demand, called Book Flipping Scanning, has been proposed. This is a n …

    Journal of the Robotics Society of Japan 31(7), 712-719, 2013-09-15

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  • Reconstruction of 3D Surface and Restoration of Flat Document Image from Monocular Image Sequence  [in Japanese]

    WATANABE Yoshihiro , SHIBAYAMA Hiroki , ISHIKAWA Masatoshi

    紙媒体の書籍を電子化するニーズが高まっている.モバイル情報端末の多くにカメラが搭載される中,このようなニーズに応えるために,カメラを用いた新たなスキャナが有効であると考えられる.ここで,書籍電子化の速度を大幅に向上させる方式として,めくり動作中に変形する紙面の書籍画像を取り込むものが提案されている.一方,このような方式では,捉えられた書籍画像のひずみを補正する技術が必須となる.そこで,本論文では, …

    The IEICE transactions on information and systems (Japanese edition) 96(8), 1731-1742, 2013-08-01

    References (47)

  • Dynamic Manipulation of a Flexible Rope using a High-speed Robot Arm  [in Japanese]

    YAMAKAWA Yuji , NAMIKI Akio , ISHIKAWA Masatoshi

    The purpose of this study is to perform a dynamic manipulation of a linear flexible object. As examples of the dynamic manipulation, shape controls and a dynamic knotting of a flexible rope are achiev …

    Journal of the Robotics Society of Japan 31(6), 628-638, 2013-07-15

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  • Dynamic Biped Locomotion Using Asymmetry of Sliding Friction  [in Japanese]

    SENOO Taku , TAKANO Mitsuhiro , ISHIKAWA Masatoshi

    In this paper, dynamic biped locomotion is considered with the goal of achieving fast and dexterous leg motion. We propose a new movement principle for legged robots, which produces propulsive force u …

    Journal of the Robotics Society of Japan 31(3), 301-309, 2013-04-15

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  • Knotting Plan based on Synthesis of Manipulation Skills with Considerations of Robot Hand Mechanism and Motion  [in Japanese]

    YAMAKAWA Yuji , NAMIKI Akio , ISHIKAWA Masatoshi , SHIMOJO Makoto

    This paper demonstrates the relationship between the production process of a knot and robot hand skills. First, we define the descriptions (rope intersection and fixed position) of a knot. Next, the c …

    Journal of the Robotics Society of Japan 31(3), 283-291, 2013-04-15

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  • Real-time 3D Tracking of Pages and its Condition Assessment for Book Digitization based on Adaptive Capture  [in Japanese]

    NOGUCHI Shohei , YAMEI Miho , YAMADA Masahiro , WATANEBE Yoshihiro , ISHIKAWA Masatoshi

    We report a new book digitization system and new adaptive capture method that enables to obtain high-resolution document images while the pages are flipped automatically. This system provides two dist …

    Technical report of IEICE. PRMU 112(495), 49-54, 2013-03-14

  • High-Speed Document Digitization System  [in Japanese]

    YAMADA Masahiro , WATANABE Yoshihiro , ISHIKAWA Masatoshi

    In recent years, the demand for high-speed, high-definition book-scanning technology is increasing. In response to this demand, Dai Nippon Printing and the University of Tokyo have developed a book sc …

    Journal of Printing Science and Technology 50(3), 267-271, 2013

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