中值滤波可以保留目标边缘，这是中值滤波器相对于均值滤波器的最大优势。中值滤波具有去噪的性能，可以消除孤立的噪声点，可以用来减弱随机干扰和脉冲干扰，但是边缘不模糊。(Median filter can retain the target edge, which is the maximum advantage of median filter compared to mean filter. The median filter has the performance of denoising, which can eliminate the isolated noise point, which can be used to reduce the random interference and pulse interference, but the edge is not fuzzy.)