摘要
应用数字图像相关法计算变形前后图像中各点的位移量时,先通过整像素搜索法来确定各点的整像素位移,进而根据整像素搜索得到的相关系数值来计算各点的亚像素位移.提出了一种新的整像素搜索法,即采用计算窗口加权的方法对变形前后图像中的点进行搜索计算.计算结果表明,该方法是可行的,同时可以提高计算结果准确度.
In the digital image correlation method, the first step to obtain the displacements of each point in the images taken before and after deformation was to confirm its integer pixel displacement, then to compute its sub-pixel displacement using the correlation coefficient of the integer pixel. A new computing method about the integer pixel was developed, which was by using weighted window to compute the integer pixel displacement of each point. The numerical simulation results show that it can improve the displacement accuracy.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2008年第12期2568-2571,共4页
Acta Photonica Sinica
基金
国家自然科学基金(10702001、10472113)
北京同步辐射实验室基金资助
关键词
数字图像相关
计算窗口
加权因子
Digital image correlation
Computing window
Weighted factor
