Edge-preserving filter with similarity noise detection for impulse noise reduction
XU Bingchun · Journal of Computer Applications · 2012
In order to improve the filtering effect of noise image,this paper put forward a new filtering algorithm.This algorithm consisted of three stages.Firstly,the similarities of the pixels were used in the image to detect the impulse noise.Then the filter window was divided into eight main directions to determine the directions of the edges,and at last these impulse noises were restored using an edge-preserving method.The simulation results indicate that this algorithm can not only accurately detect the noise points,but aslo protect the noise-free pixels and the boundaries in the noise image when the noise density is small.