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A study on under-matched measurement error in digital image correlation
Author(s): Bang-Jian Li; Quan-Bao Wang; Deng-Ping Duan
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Paper Abstract

In the classic subset-based digital image correlation (DIC) technique, the displacement measurement errors due to the shape function have been a key factor. Generally, the first-order shape function is widely employed. However, in the practical experiments, the order of the deformation of the specimen is higher than the selected shape function. So the errors due to the under-matched shape functions are presented. Although the systematic errors due to under-matched displacement mapping functions and the random errors due to matched or overmatched displacement mapping function have been examined, the root-mean-square errors (RMSE) due to under-matched shape function are still not investigated. In the paper, the root-mean-square errors of the measured displacements due to under-matched shape function are studied experimentally by using simulated speckle patterns.

Paper Details

Date Published: 24 July 2018
PDF: 5 pages
Proc. SPIE 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 1082726 (24 July 2018); doi: 10.1117/12.2500942
Show Author Affiliations
Bang-Jian Li, Shanghai Jiao Tong Univ. (China)
Quan-Bao Wang, Shanghai Jiao Tong Univ. (China)
Deng-Ping Duan, Shanghai Jiao Tong Univ. (China)


Published in SPIE Proceedings Vol. 10827:
Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018)
Yingjie Yu; Chao Zuo; Kemao Qian, Editor(s)

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