Three-dimensional shape measurement of object in water using fringe projection and phase value tracking

Qican Zhang; Qingfeng Wang; Zhiling Hou; Yuankun Liu; Xianyu Su

doi:10.1117/12.851571

14 April 2010 Three-dimensional shape measurement of object in water using fringe projection and phase value tracking

Qican Zhang, Qingfeng Wang, Zhiling Hou, Yuankun Liu, Xianyu Su

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 752258 (2010) https://doi.org/10.1117/12.851571
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

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.

Citation Download Citation

Qican Zhang, Qingfeng Wang, Zhiling Hou, Yuankun Liu, and Xianyu Su "Three-dimensional shape measurement of object in water using fringe projection and phase value tracking", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752258 (14 April 2010); https://doi.org/10.1117/12.851571

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