程序实现影像中点的提取，是摄影测量中获取做匹配必不可少的步骤。-Program for image mid-point of the extraction is done in photogrammetry to obtain matching indispensable step.

文件中的是图像配准过程中常用的几种提取特征点的方法-Several common methods of extracting keypoits in the process of image registration