说明：  最大化类间方差阈值分割，使用matlab编程实现。dowels.tif，rice.png，coins.png文件进行实验，函数包括滤波、分割、腐蚀、膨胀、分割粘连，最后计算个数。
(The threshold segmentation of maximizing the variance between classes is realized by MATLAB programming. dowels.tif , rice.png , coins.png The functions include filtering, segmentation, erosion, expansion, segmentation adhesion, and finally calculate the number.)