说明：  程序能够完成自商图像的功能，可用于光照条件变化下对于图像的简单处理。加入了单亮区和单暗区，从而减小光照的影响。压缩包中还带有一个迭代阈值选取的小程序。
(Program to complete the self-quotient image function can be used to change the lighting conditions under simple treatment for images. Joined the single light and single dark areas, thereby reducing the impact of lighting. Compression package also comes with an iterative threshold of small programs.)