论文《一种基于梯度的直线段检测算法—光子学报》的matlab源码和论文PDF，点main函数运行，直线段效果非常好。里面还有一个main_hf的哈夫变换的直线段检测方法，作为对比。-Paper " based on gradient line segment detection algorithm- Photon Technology" matlab source, point main function runs, the effect is very good straig