中文说明：最简单的分割形式是阈值分割。全局阈值。在最佳阈值分割中，设计了一个准则来产生区域间函数分离的一些度量。两个区域被认为是前景和背景。在Otsu方法中，通过选取两类像素间的最低点，进行方差分析，将每类像素的平均值与所有像素的整体亮度平均值的变化定义为
English Description：
Simplest form of segmentation is thresholding. Global thresholding. In optimal thresholding, a criterion is devised to yield some measure of separation between regions function. Two regions are consider to be the foreground and background. in Otsu Method, Based on selecting the lowest point between two classes, Analysis of the variance, The variation of the mean values for each class from the overall intensity mean of all pixels defines a between-classes variance. Algorithm Compute histogram and probabilities of each intensity level Set up initial and Step through all possible thresholds