A new method of the noise detection and a new adaptive weighted filter,based on the grey system theory and the mean image,are proposed in this paper.At first,the grey coefficients of incidence matrix are calculated between the noise image and the mean image and the noise spots are distinguished according to the relations between the grey coefficients of incidence matrix and the threshold value TH.Moreover,taking the pixels of the mean image which the noise spot corresponds as the center,the grey prediction ...