说明：  基于二维信息熵的图像分割，自己写的，经典版的，带注释的，还有理论公式的说明，欢迎加企鹅号，30二8四51六7，一起讨论该算法。
(Based on two-dimensional information entropy image segmentation, wrote it myself, classic version, annotated, and theoretical explanation of the formula, please add number of penguins, six 30 51 7 8 four, along with discussion of the algorithm.)