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Proceedings Paper

3D shape measurement in occluded environments based on stereo PMP algorithm
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Paper Abstract

Nowadays, a number of 3D measurement methods have been developed such as stereo vision, laser structured light and PMP (Phase Measuring Profilometry) method. However, they have its own limitations : 2π ambiguity, correspondence problem, long estimation time. To solve these problems, in our previous researches [9,13], we introduced a novel sensing method adopting stereo vision and PMP technique (stereo PMP algorithm). One other difficult problem is occlusion problem needed to tackle by the stereo PMP algorithm which uses the principle of stereo vision and two cameras. The occlusion problem cannot be solved by using the principle of typical stereo vision, because there is no correspondence point in occlusion area. In our previous research based on stereo PMP algorithm, however, phase information related to the projector's position is additionally used which gives more additional information. By using this additional information, we can solve the occlusion problem effectively. In order to detect occlusion area, we adopt the principle of Dynamic Programming, while to measure the depth the principle of typical PMP algorithm and the geometrical relationship of detected depth area. To verify the efficiency of the proposed method, a series of experimental tests were performed.

Paper Details

Date Published: 17 November 2008
PDF: 10 pages
Proc. SPIE 7266, Optomechatronic Technologies 2008, 72660R (17 November 2008); doi: 10.1117/12.816470
Show Author Affiliations
Hyunki Lee, Korea Advanced Institute of Science and Technology (Korea, Republic of)
Deokhwa Hong, Korea Advanced Institute of Science and Technology (Korea, Republic of)
Hyungsuck Cho, Korea Advanced Institute of Science and Technology (Korea, Republic of)

Published in SPIE Proceedings Vol. 7266:
Optomechatronic Technologies 2008
John T. Wen; Dalibor Hodko; Yukitoshi Otani; Jonathan Kofman; Okyay Kaynak, Editor(s)

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