Using camera calibration to apply digital image correlation outside the laboratory

Zhenning Liang; Bo Yin; Xin Dai; Jinqiu Mo; Shigang Wang

doi:10.1117/1.OE.52.12.123102

16 December 2013 Using camera calibration to apply digital image correlation outside the laboratory

Zhenning Liang, Bo Yin, Xin Dai, Jinqiu Mo, Shigang Wang

Author Affiliations +

Funded by: National Natural Science Foundation of China

Optical Engineering, Vol. 52, Issue 12, 123102 (December 2013). https://doi.org/10.1117/1.OE.52.12.123102

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.

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Zhenning Liang, Bo Yin, Xin Dai, Jinqiu Mo, and Shigang Wang "Using camera calibration to apply digital image correlation outside the laboratory," Optical Engineering 52(12), 123102 (16 December 2013). https://doi.org/10.1117/1.OE.52.12.123102

Published: 16 December 2013

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