数字图像相关
变形(气象学)
失真(音乐)
像素
计算机科学
共形映射
反向
弯曲
影子(心理学)
数字图像
算法
材料科学
图像(数学)
人工智能
图像处理
数学
数学分析
几何学
复合材料
计算机网络
放大器
心理学
心理治疗师
带宽(计算)
作者
Jingchen Ye,Hongwei Ji,Xiaochuan Zhang
标识
DOI:10.1016/j.optlaseng.2022.106985
摘要
Digital image correlation (DIC) has the advantages of non-contact full-field measurement and high measurement accuracy in optical mechanics, but still faces challenges in large deformation measurement. This work developed an initial estimation algorithm, using geometric distortion as an indicator. And the more accurate deformation is adjusted by the modified inverse compositional Gauss-Newton (IC-GN) algorithm that introduces the inverse mapping of the initial estimation. The simulation experiment proves that the proposed method has good measurement ability for large deformation, and the accuracy is about 0.02 pixels. The uniaxial tensile test of vulcanized rubber and the three-point bending test of the polycarbonate sheet are used to verify the effectiveness of the method in this paper.
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