1、 矩形窗口的直线段裁剪（Cohen-Sutherlan算法必做，再在梁友栋和中点分割算法中任选一种）-a rectangular window line of cutting (Cohen-Sutherlan algorithm will do, again in mid-point and friends of Liang Dong segmentation algorithm An optional)

数字图像特征识别，用于对数字分割后的图像特征进行提取，识别数字特征-dong know