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Optical Engineering

Using camera calibration to apply digital image correlation outside the laboratory
Author(s): Zhenning Liang; Bo Yin; Xin Dai; Jinqiu Mo; Shigang Wang
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Paper Abstract

An innovative single-camera two-dimensional digital image correlation (DIC) technique based on camera self-calibration is developed for use in the field where specialized fixed setups are not practical. The technique only requires attaching a planar calibration cover to the specimen surface and capturing images of the specimen from different orientations before and after deformation. A camera calibration procedure allows the camera to be freely repositioned without fixed mounts or known configurations, after which displacements are calculated with DIC. Computer simulated, random speckle images are used to test the proposed technique and good results are reported. Compared with the classical techniques which require precise fixed setups, the proposed technique is easier to use and more flexible, advancing the DIC beyond the laboratory into the real world.

Paper Details

Date Published: 16 December 2013
PDF: 8 pages
Opt. Eng. 52(12) 123102 doi: 10.1117/1.OE.52.12.123102
Published in: Optical Engineering Volume 52, Issue 12
Show Author Affiliations
Zhenning Liang, Shanghai Jiao Tong Univ. (China)
Bo Yin, Shanghai Jiao Tong Univ. (China)
Xin Dai, Shanghai Jiao Tong Univ. (China)
Jinqiu Mo, Shanghai Jiao Tong Univ. (China)
Shigang Wang, Shanghai Jiao Tong Univ. (China)

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