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Proceedings Paper

3D deformation measurement by digital speckle correlation method and stereo vision
Author(s): Hua Chen; Gang Chen; Dong Ye; Rensheng Che
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Paper Abstract

An advanced 3D deformation measurement method based on 2D digital speckle correlation method and stereo vision is proposed in the paper. The intrinsic parameters and extrinsic parameters of two digital CCD cameras have been calibrated. The speckle images of the specimen from different directions are recorded by two cameras before and after deformation. The deformation displacement and strain of the specimen are calculated from these speckle images by digital speckle correlation method and geometrical relation of stereography. The whole field deformation can be obtained by tracking the gray character of each surface point in a subset. A new correlation search method based on genetic algorithm is proposed, which gets rid of great computational complexity and bad quality of conventional correlation search methods. The performance of the method is demonstrated by real test.

Paper Details

Date Published: 27 November 2007
PDF: 5 pages
Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 67231N (27 November 2007); doi: 10.1117/12.783189
Show Author Affiliations
Hua Chen, Harbin Institute of Technology (China)
Gang Chen, Harbin Institute of Technology (China)
Dong Ye, Harbin Institute of Technology (China)
Rensheng Che, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 6723:
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Junhua Pan; James C. Wyant; Hexin Wang, Editor(s)

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