Improved Digital Image Correlation method
Improved Digital Image Correlation method
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DOI：
10.1016/j.optlaseng.2015.10.002
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发表时间：
2016-12-01
影响因子：
4.6
通讯作者：
Butt, Saira
中科院分区：
文献类型：
--
作者：
Mudassar, Asloob Ahmad;Butt, Saira
数字图像相关（DIC）是一种强大的技术，用于关联两个图像片段以确定它们之间的相似性。形成相关图像，该图像给出称为相关峰值的峰值。如果两个图像片段相同，则该峰值称为自相关峰值，否则称为互相关峰值。相关图像中峰值的位置给出了两个图像片段之间的相对位移。在电子散斑摄影 (ESP) 中使用 DIC 进行面内位移和变形测量是众所周知的。在 ESP 中，使用 DIC 关联两个散斑图像并测量相对位移。我们正在介绍 ESP 的背景审查，并公开一种基于 DIC 的技术，用于改进相对测量，我们将其视为改进的 DIC 方法。仿真和实验结果表明，所提出的改进的DIC方法在分辨率和位移测量中参考位置的可用性两个方面优于传统的DIC方法。 (C) 2015 Elsevier Ltd. 保留所有权利。
Digital Image Correlation(DIC) is a powerful technique which is used to correlate two image segments to determine the similarity between them. A correlation image is formed which gives a peak known as correlation peak. If the two image segments are identical the peak is known as auto-correlation peak otherwise it is known as cross correlation peak. The location of the peak in a correlation image gives the relative displacement between the two image segments. Use of DIC for in-plane displacement and deformation measurements in Electronic Speckle Photography (ESP) is well known. In ESP two speckle images are correlated using DIC and relative displacement is measured. We are presenting background review of ESP and disclosing a technique based on DIC for improved relative measurements which we regard as the improved DIC method. Simulation and experimental results reveal that the proposed improved-DIC method is superior to the conventional DIC method in two aspects, in resolution and in the availability of reference position in displacement measurements. (C) 2015 Elsevier Ltd. All rights reserved.