图像膨胀 图像腐蚀 图像的开运算 关运算 骨架提取 边缘检测 bottom-hat滤波 top-hat对图像进行滤波 确定图像的最小值 距离变换等功能-Image image image expansion corrosion open computing correlation operation skeleton extraction edge detection bottom-hat filter top-hat image for image filtering to determine