一个256位图可进行固定阈值处理，类间距法与之处理等阈值处理方法得到一张二值图，然后对处理出来的图像进行标记法计数，从而得到计数的目的-A 256-bit map can be a fixed threshold value processing, with processing class distance threshold method approach to get a binary image, and then deal out the image tags were counted