关键词: 自适应算法, 彩色图像处理, 脉冲噪声, 多通道滤波器

Abstract: An iterative self-adaptive filtering algorithm based on local extreme value noise detection of impulsive noise reduction in color images is presented.As to the three channels of the color image，an impulse detector is presented to find out all pixels that are considered as noise before filtering separately;if a pixel is considered as noise，it will be replaced by a pixel in the neighborhood which is noise-free during filtering procedure later;otherwise，it is unchanged.As demonstrated by the extensive experimental results，the proposed filtering method compares favorably with conventional techniques in the capabilities of noise attenuation and details preservation，in both quantitative and qualitative measures.

Key words: self-adaptive algorithm, color image processing, impulsive noise, multichannel filters