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Proceedings Paper

Three-dimensional shape measurement of object in water using fringe projection and phase value tracking
Author(s): Qican Zhang; Qingfeng Wang; Zhiling Hou; Yuankun Liu; Xianyu Su
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Paper Abstract

In this paper, a practical method using phase tracking algorithm and ray tracing algorithm is proposed for measuring the 3D shape of an underwater object. A sinusoidal fringe is projected through the water to modulate the information of the tested object's 3D shape. Firstly, according to the binocular stereovision principle and regarding the projector as a special camera, the phase tracking algorithm is taken to identify the homologous points in the phase distribution of the deformed fringe captured by the camera and that of the fringe pattern projected by the projector. The relationship between those two coordinate systems will be fixed on. Secondly, the ray tracing algorithm is used to trace the propagation path of each ray and define the 3D coordinates of each point on the tested object's surface. Finally, the whole shape of the tested object can be reconstructed. Without any scanning device, the method proposed in this paper can speed up the measurement process and reduce the cost. An actual measurement for a model and a hand in the water was done, the prefect results of the reconstructed shapes prove this method correctly and feasibility.

Paper Details

Date Published: 14 April 2010
PDF: 7 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752258 (14 April 2010); doi: 10.1117/12.851571
Show Author Affiliations
Qican Zhang, Sichuan Univ. (China)
Qingfeng Wang, Sichuan Univ. (China)
Zhiling Hou, Sichuan Univ. (China)
Yuankun Liu, Sichuan Univ. (China)
Xianyu Su, Sichuan Univ. (China)

Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics
Chenggen Quan; Kemao Qian; Anand Krishna Asundi; Fook Siong Chau, Editor(s)

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