对图像添加盐噪，设计一滤波器滤除盐噪声； 本人初学matlab，想有机会了解到更多的源代码，馆长给我机会啊-Add salt to the image noise, design a noise filter to filter out salt my novice matlab, would like to have the opportunity to learn more of the source code, the director for giving me the oppor