中值平均滤波法，中值滤波是一种非线性滤波，一般用来处理图像的椒盐噪声。当用来保持边缘同时滤波的要求下，中值滤波要比卷积滤波更加有效。-Median filter is a nonlinear filtering, usually used for salt and pepper noise image processing. When the filter is used to keep the edge of the filter, the median filter is more effe