对运动目标进行区域标记以后，去掉小面积的连通区域来消除噪声。-After the moving target region mark, remove a small area of ​ ​ regional connectivity to eliminate noise.

在二值化图中找出各处连通区域，并作不同标记值。-Locate the binary graph connectivity throughout the region, and make a different tag value.