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发表刊物：Optics and Lasers in Engineering
摘要：For subset-based digital image correlation, the random error of second-order shape function roughly doubles that of first-order shape function, termed doubled random error phenomenon. In this work, we suggest that the fundamental cause of this phenomenon is the uniformity and isotropy of speckle pattern. Specially, we prove that the ratio of random error of second-order shape function to that of first-order shape function, from a view of statistic, is expected to be 3.5^0.5 ( ≈ 1.87), which is quite close to the empirical value 2. Numerical experiments demonstrate the correctness of propose theoretical analysis.
论文类型：期刊论文
论文编号：106097
文献类型：J
卷号：131
是否译文：否
发表时间：2020-08-01
收录刊物：SCI