腐蚀是图像形态学的两个基本操作之一，另外一个是膨胀(Dilate)。二值图像上的腐蚀是腐蚀最典型的运用，但是腐蚀操作同样可以运用于灰度图像。二值图像腐蚀操作最基本的效果是腐蚀图像中前景色区域的边缘。使得前景图像区域变小，前景图像内部的背景区域被放大。-Corrosion is one of the two basic operation of the image morphology, and the other one is the expansion (Dilate). Corrosion on the binary image is the most typical use of etching, but etching operation can also be applied to grayscale images. Binary image etching operation is essential effect edge erosion foreground image area. So that the foreground image area becomes smaller, the foreground image inside the background area is enlarged.