中文说明：基于最大类间方差准则的阈值分割算法。其基本思想是对像素进行划分，通过划分得到的各类之间的距离达到最大，来确定合适的门限。
English Description：
Threshold segmentation algorithm based on the maximum variance between classes criterion. The basic idea is to divide the pixels, and determine the appropriate threshold by maximizing the distance between different types.