说明：  Python/Cython实现的Zhang-Suen图像骨架提取算法，骨架提取效果较好，轮廓比较平滑，信息丢失较小，推荐。 使用Cython编译后可以达到接近C语言的效率。
(Python/Cython achieved Zhang-Suen image skeleton extraction algorithm, skeleton extraction better, smoother contours, less information is lost, it is recommended. After using Cython can reach close to C language compiler efficiency.)