说明：  分水岭算法Matlab实现。如果图像中的目标物体是连在一起的，则分割起来会更困难，分水岭算法经常用于处理这类问题，通常会取得比较好的效果。
(Matlab implementation of watershed algorithm.If the object in the image together, then split up and it will be more difficult, the watershed algorithm often used to deal with such issues, usually obtain better results.)