3D shape measurement of larger complex objects based on fringe cycle correction
The grating fringe on the reference plane is broadened in the intersecting axis system because of oblique-angle projection. In order to solve this problem, we study the theoretical model of the temporal phase unwrapping method based on the fringe cycle correction. We also study the 3D shape measurement theoretical model of the larger complex objects after considering the coordinate deviation and lens distortion. Experimental results demonstrate that the fringe cycle on the reference plane can be corrected to a constant value, the lens distortion can be corrected, and 3D shape of larger complex objects can be accurately measured.
Jie Yang：Key Laboratory of Nondestructive Testing (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China
Zhigang Wang：Key Laboratory of Nondestructive Testing (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China
Haitao Wu：Key Laboratory of Nondestructive Testing (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China
备注：This work was supported by the National Natural Science Foundation of China (No. 51365045), the Natural Science Foundation of Jiangxi Province (No. 20122BAB202012), the Aviation Science Fund (No. 2013ZE56013), and the Education Department of Jiangxi Province (No. GJJ13522).
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Yanjun Fu, Jie Yang, Zhigang Wang, Haitao Wu, "3D shape measurement of larger complex objects based on fringe cycle correction," Chinese Optics Letters 12(12), 121101 (2014)
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