用形态学方法提取骨架线。程序还是基于MFC的单文档界面，重用以前的位图包裹类来封装对位图的操作，增加一个数学形态学类来进行通用的数学形态学操作。-morphological Skeleton extraction methods. MFC procedures based on the single-document interface reuse previous bitmap category wrapped package to the right bitmap operation, an