A Salt-and-Pepper Noise Filtering Algorithm

The salt-and-pepper noise filter is generally based on median filtering and there are many filtering methods of it.According to the different regions of salt-and-pepper noise points,this paper uses different methods: mean filtering for non-edge noise,minimum value for edge noise points to enhance the edge,original value kept for non-noise regions.The algorithm has better filtering effect,and has better protection effect for fine edges.