中文说明：可以利用matlab,方便地提取图像对象的边缘，对初学者好有帮助,这文件不是原创，但不记得出处了，共享出来让大家学习一下。
English Description：
Can use MATLAB, easy to extract the edge of the image object, good help for beginners, this file is not original, but do not remember the source, share it for you to learn.