A new efficient approach for the removal of impulse noise is presented based on the characteristic of impulse noise in this paper.The algorithm is composed of two steps.The first step is to identify the impulse noise of image.The following step is to smooth the identified noise pixel

where we take into account the impulse noise characteristic and utilize the topological connectedness of impulse noise.In the second step

using the information around the noise pixel restores the noise pixel.Simulation results demonstrate that the proposed algorithm is obviously better than traditional median-based filters and switching median filter

and is particularly effective for the cases where the images are very highly corrupted.