文中研究了用图像技术来检测微位移的问题 ,提出一种路径匹配微位移检测算法。该算法能自动搜索移动前后图像中匹配边缘 ,并避免了常用图像匹配算法复杂度太大的问题。文中还对算法进行了可信性分析并给出了实验结果。理论分析和实验结果表明 ,路径相关微位移检测算法运算量小且获得了亚像素的准确度 In this paper, the problem of detecting micro-displacement using image technology is studied, and a path-matching micro-displacement detection algorithm is proposed. The algorithm can automatically search for matching edges in the image before and after moving, and avoids the problem that the commonly used image matching algorithm is too complicated. The paper also makes a credible analysis of the algorithm and gives the experimental results. Theoretical analysis and experimental results show that the path-dependent micro-displacement detection algorithm has a low computational complexity and obtains the sub-pixel accuracy