数字图像相关方法中的一种亚像素求解算法，通过此算法可以获得全场位移，继而得到全场形变。-A sub-pixel algorithm in digital image correlation method, which can obtain the full field displacement, and then get the full field deformation.

DIC程序，基于傅里叶变换的算法，且经过亚像素差值可以准确计算两张图片的位移情况。-DIC program, you can accurately calculate the two pictures displacement by Fourier algorithm and the sub-pixel precision.