中文说明：这是角点检测的程序，图像中所有凹凸点都可以检测到，并在二值图像上显示出来，效果不错。直接运行corner.m即可
English Description：
This is the corner detection program, all the concave and convex points in the image can be detected, and displayed on the binary image, the effect is good. Just run corner. M directly