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Title: Path-independent digital image correlation with high accuracy, speed and robustness
Authors: Jiang, Zhenyu
Kemao, Qian
Miao, Hong
Yang, Jinglei
Tang, Liqun
Keywords: Digital image correlation
Fast Fourier transform
Inverse compositional algorithm
Gauss–Newton method
Issue Date: 2014
Source: Jiang, Z., Kemao, Q., Miao, H., Yang, J., & Tang, L. (2015). Path-independent digital image correlation with high accuracy, speed and robustness. Optics and Lasers in Engineering, 65, 93-102.
Series/Report no.: Optics and Lasers in Engineering
Abstract: The initial guess transferring mechanism is widely used in iterative DIC algorithms and leads to path-dependence. Using the known deformation at a processed point to estimate the initial guess at its neighboring points could save considerable computation time, and a cogitatively-selected processing path contributes to the improved robustness. In this work, our experimental study demonstrates that a path-independent DIC method is capable to achieve high accuracy, efficiency and robustness in full-field measurement of deformation, by combining an inverse compositional Gauss–Newton (IC-GN) algorithm for sub-pixel registration with a fast Fourier transform-based cross correlation (FFT-CC) algorithm to estimate the initial guess. In the proposed DIC method, the determination of initial guess accelerated by well developed software library can be a negligible burden of computation. The path-independence also endows the DIC method with the ability to handle the images containing large discontinuity of deformation without manual intervention. Furthermore, the possible performance of the proposed path-independent DIC method on parallel computing device is estimated, which shows the feasibility of the development of real-time DIC with high-accuracy.
ISSN: 0143-8166
DOI: 10.1016/j.optlaseng.2014.06.011
Rights: © 2014 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Optics and Lasers in Engineering, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles
SCSE Journal Articles

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