Patent ID: 7342688

Claim:
A method for eliminating moire in scanned digital image, comprising following steps: (a). using an average circuit for taking weighted average and error diffusing a gray level difference between an error diffusion pixel G ij and neighbor pixels to neighbor to obtain output image pixel Y′ ij ; (b). using a second adder for operating the error diffusion pixel G ij and the output image pixel Y′ ij to obtain a neighbor image error d ij ; (c). using a error filter H(z) to process the neighbor image error d ij to obtain a corrected pixel error H(d(i,j)); and (d). using a first adder for operating the corrected pixel error H(d(i,j)) and the input image pixel Y ij to obtain the corrected error diffusion pixel G ij , and then jumping to step (a) until all pixels being processed.