关键词: 关联系数, 灰色绝对关联度, 椒盐噪声, 中值滤波, 图像去噪

Abstract: This paper integrated the characteristics of the grey absolute relation with the advantages of the median filter to combine the pixels within the n×n template into two sequences, where n is an odd number that is greater than or equal to 3. Then, the characteristics of the grey absolute relation were used to determine the similarity between the two sequences. Finally, the degree of similarity was adopted to determine whether the current pixel is noise or not, and then the value of median filter was used to replace the noise one. The experimental results show that this algorithm has better filtering effect than the standard median filter method and other filtering methods while keepings more details of the original image.

Key words: relation coefficient, grey absolute relation, salt-and-pepper noise, median filter, image denoising