中文说明：根据马尔科夫原理分割灰度图像，预处理时可用k-means处理会灰度不均匀情况，先将图片大致分为两类，再根据贝叶斯定理，先验概率等分割图像，程序可执行。
English Description：
According to the principle of Markov segmentation gray image, preprocessing can use k-means to deal with the uneven gray situation, first the image is roughly divided into two categories, and then according to the Bayes theorem, a priori probability segmentation image, the program can be executed.