中文说明：首先读取一副图像，将其转化为灰度图，求其直方图，根据直方图和线性分类器的知识，求其分割阈值，然后对图像进行分割
English Description：
First of all, reading an image, convert it to grayscale, for its histogram based on the histogram, and the linear classifier for knowledge, the segmentation threshold,and then the image segmentation