说明：  程序实现了基于最大熵准则的图像分割。其中实现灰度阈值算法即算出双峰的谷底值的方法为：利用灰度直方图求谷底，然后求第一个峰值，第二个，再求谷的位置……
(Program to achieve the image segmentation based on maximum entropy criterion. The grayscale threshold algorithm, which is calculated bimodal trough value as follows: gray histogram to seek the bottom, and then ask the first peak, second, and then seek the location of the Valley ...)