Equivalence of digital image correlation criteria for pattern matching
Equivalence of digital image correlation criteria for pattern matching
复制标题
模式匹配的数字图像相关准则的等效性
DOI：
10.1364/ao.49.005501
复制
发表时间：
2010-10-01
期刊：
影响因子：
1.9
通讯作者：
Wang, Zhaoyang
中科院分区：
文献类型：
--
作者：
Pan, Bing;Xie, Huimin;Wang, Zhaoyang
在数字图像相关（DIC）中，为了获得每个感兴趣点的位移，必须预先定义一个相关准则来评价参考子集和目标子集之间的相似性。相关性准则在DIC中具有根本的重要性，并且在文献中已经设计和使用了各种相关性准则。然而，很少有研究已经进行了调查他们的关系。在本文中，我们首先提供了一个全面的概述，各种相关标准中使用的DIC。然后，我们专注于三个强大的和最广泛使用的相关性标准，即，零均值归一化互相关（ZNCC）准则、零均值归一化平方差和（ZNSSD）准则和具有两个附加未知参数的参数平方差和（PSSDab）准则，因为它们对目标子集强度的尺度和偏移变化不敏感，并且在文献中被高度推荐用于实际使用。通过对这三种相关准则的分析，建立了它们之间的横向关系，理论分析表明这三种相关准则实际上是等价的，从而将这三种相关准则统一起来用于模式匹配。最后，通过数值模拟和实际实验进一步验证了这些相关准则的等价性。(C)2010年美国光学学会
In digital image correlation (DIC), to obtain the displacements of each point of interest, a correlation criterion must be predefined to evaluate the similarity between the reference subset and the target subset. The correlation criterion is of fundamental importance in DIC, and various correlation criteria have been designed and used in literature. However, little research has been carried out to investigate their relations. In this paper, we first provide a comprehensive overview of various correlation criteria used in DIC. Then we focus on three robust and most widely used correlation criteria, i.e., a zero-mean normalized cross-correlation (ZNCC) criterion, a zero-mean normalized sum of squared difference (ZNSSD) criterion, and a parametric sum of squared difference (PSSDab) criterion with two additional unknown parameters, since they are insensitive to the scale and offset changes of the target subset intensity and have been highly recommended for practical use in literature. The three correlation criteria are analyzed to establish their transversal relationships, and the theoretical analyses clearly indicate that the three correlation criteria are actually equivalent, which elegantly unifies these correlation criteria for pattern matching. Finally, the equivalence of these correlation criteria is further validated by numerical simulation and actual experiment. (C) 2010 Optical Society of America