连通区域标记程序,本程序使用了opencv中图像数据结构：IplImage。算法原理：首先进行第一次扫描，标记连通区域；然后对等价标记进行合并；最后进行第二次扫描，对等价标记进行重新标记。-regional connectivity marking procedures, the procedures for the use of the OpenCV Image data structure : IplImage. Algorithm tenets : first for the first time, scanning, marking regional connectivity; Then equivalent marker for the merger; the final for the second scan, equivalent to re-labeled markers.