直方图特征的计算，包括方差，峰度，熵值等。-Histogram of the characteristics of the calculation, including the variance, kurtosis, entropy and so on.

这个源代码是计算图像的熵值以及绘制多条曲线的方法，已经实现过。-This source code is to calculate the entropy of the image as well as a number of methods to draw curves, have been implemented.