read_image (Image, '27.png')
*二值分割
binary_threshold (Image, Region, 'max_separability', 'dark', UsedThreshold)
*使用腐蚀
erosion_circle (Region, RegionErosion, 5)
*计算腐蚀前和腐蚀后两个区域的差集
difference (Region, RegionErosion, RegionDifference)
dev_display (Image)
dev_display (RegionDifference)
