计算香浓信息熵，方便快捷的matlab代码，可以简单直接调用-Calculated Shannon information entropy, convenient matlab code can be simple and direct calls

计算图像Image的信息熵, 输入：目标RGB图像, 输出：信息熵, 说明：Image应是[0,1]浮点数-Calculate information entropy image Image Input: Target RGB image Output: Information Entropy Descr iption: Image should be [0,1] float