Proposal of Calibration Method for 3-D Digestive Endoscope Using Grid Active Stereo

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  • AOKI Hirooki
    Department of Opto-electronics System Engineering, Faculty of Photonics Science, Chitose Institute of Science and Technology
  • FURUKAWA Ryo
    Department of Intelligent Systems, Faculty of Information Sciences, Hiroshima City University
  • NISHITANI Ishin
    Department of Intelligent Systems, Faculty of Information Sciences, Hiroshima City University
  • AOYAMA Masahito
    Department of Intelligent Systems, Faculty of Information Sciences, Hiroshima City University
  • HIURA Shinsaku
    Department of Intelligent Systems, Faculty of Information Sciences, Hiroshima City University
  • KOMINAMI Yoko
    Department of Endoscopy and Medicine, Graduate School of Biomedical and Health Science, Hiroshima University
  • MATSUO Taiji
    Department of Endoscopy and Medicine, Graduate School of Biomedical and Health Science, Hiroshima University
  • YOSHIDA Shigeto
    Department of Endoscopy and Medicine, Graduate School of Biomedical and Health Science, Hiroshima University
  • TANAKA Shinji
    Department of Endoscopy and Medicine, Graduate School of Biomedical and Health Science, Hiroshima University
  • SAGAWA Ryusuke
    Intelligent Systems Research Institute, National Institute of Advanced Industrial Science and Technology
  • KAWASAKI Hiroshi
    Department of Information Science and Biomedical Engineering, Faculty of Engineering, Kagoshima University

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Other Title
  • グリッドアクティブステレオを用いた三次元消化器内視鏡におけるキャリブレーション手法
  • グリッドアクティブステレオ オ モチイタ サンジゲン ショウカキ ナイシキョウ ニ オケル キャリブレーション シュホウ

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Description

Calibration for calculating the external parameter of camera-projector system is important, to make high-precision 3-D measurement by 3-D endoscope using the grid active stereo. In this paper, we propose a new calibration method with a sphere calibration object in a geometrically flexible camera-projector system, and we examine the validity of the proposed method. As the result of comparing using conventional calibration with a plane calibration object, it is clarified that the proposed method resolves the scaling imprecision, that is a problem of the conventional method. Thus, the proposed method has higher potential of measurement accuracy. In addition, it is the advantage of the proposed method that precision estimation of calibration parameters with a low number of input images is possible.

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