用matlab求图像阈值分析程序，一种是直方图阈值法一种是最大类间方差-Using matlab and image threshold analysis program, a variance between a Histogram method is the largest class

阈值分割、边缘检测、线性变换、均衡直方图等图像预处理的一些代码-Some code for image preprocessing, such as threshold segmentation, edge detection, linear transformation and equalization histogram