Snake算法是一种用来计算轮廓演化的算法。它可以在给定一个大致的轮廓区域的前提下，自动地逼近并最终精确求得我们所感兴趣的目标区域。-Snake algorithm is an algorithm used to calculate the contour evolution. It can be given a rough outline of the region under the premise, the automatic approximation and the final exa