最小二乘匹配，图像匹配算法，需要初始匹配坐标，可以达到亚像素精度-Least squares matching, image matching algorithm, need the initial matching coordinates, can achieve sub-pixel accuracy

最小二乘影像匹配，精度可以达到亚像素级别-leastsquare match

二维数字图像相关算法，可实现亚像素精度的匹配和应变测量(Two dimensional digital image correlation algorithm, which can achieve sub-pixel precision matching and strain measurement)