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DOI码：10.1016/j.optlaseng.2018.05.016
发表刊物：Optics and Lasers in Engineering
摘要：Digital image correlation is a widely used optical metrology for shape, motion, and deformation measurement. Although a number of studies have been carried out on the measurement errors of digital image correlation, the spatial uncertainty of the measurement errors, which stems from the randomness of speckle patterns, is seldom researched. In this work, a theoretical model is built for the spatial uncertainty of measurement errors. Analytical formulae for the spatial variances of both the mean bias error and the standard deviation error are derived. The influences of subset size, speckle coverage, and speckle radius on the spatial uncertainty are investigated. Numerical simulations demonstrate the correctness of the proposed model.
文献类型：J
卷号：110
页面范围：113-121
是否译文：否
发表时间：2018-11-01
收录刊物：SCI