Chinese Optics Letters, 2010, 8 (6): 601, Published Online: Jun. 22, 2010   

Evaluating 3D position and velocity of subject in parabolic flight experiment by use of the binocular stereo vision measurement Download: 680次

Author Affiliations
1 Shanghai Key Laboratory of Modern Optical System, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2 Department of Electronic Engineering, Faculty of Engineering, Gunma University, Gunma 376-8515, Japan
3 Department of Computer Science, Faculty of Engineering, Gunma University, Gunma 376-8515, Japan
4 Medical Operations, Japan Aerospace Exploration Agency (JAXA), JAXA Houston Office, Houston 77058, USA
Abstract
A practical method for evaluating the three-dimensional (3D) position and velocity of a moving object used in the parabolic flight experiment is developed by using the binocular stereo vision measurement theory. The camera calibration mathematic model without considering the lens distortion is introduced. The direct linear transformation (DLT) algorithm is improved to accomplish the camera calibration. The camera calibration result and optimization algorithm are used to calculate the object's world coordinate from image coordinate. The 3D position and the velocity of the moving object are obtained. The standard uncertainty in estimating the velocity is 0.0024 m/s, which corresponds to 1% level of the velocity of the object in the experiment. The results show that this method is very useful for the parabolic flight experiments.

Tao Jin, Hongzhi Jia, Wenmei Hou, Ryo Yamamoto, Norihiro Nagai, Yusaku Fujii, Koichi Maru, Naoya Ohta, Kazuhito Shimada. Evaluating 3D position and velocity of subject in parabolic flight experiment by use of the binocular stereo vision measurement[J]. Chinese Optics Letters, 2010, 8(6): 601.

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