| 摘要 |
A method for eliminating moiré in scanned digital image comprises the steps of using an average circuit for taking weighted average and error diffusing a gray level difference between an error diffusion pixel G<SUB>ij </SUB>and neighbor pixels to neighbor to obtain output image pixel Y'<SUB>ij</SUB>; using a second adder for subtracting the error diffusion pixel G<SUB>ij </SUB>from the output image pixel Y'<SUB>ij </SUB>to obtain a neighbor image error d<SUB>ij</SUB>; using a error filter H(z) to process the neighbor image error d<SUB>ij </SUB>to obtain a corrected pixel error H(d(i,j)); and using a first adder for adding the corrected pixel error H(d(i,j)) and the input image pixel Y<SUB>ij </SUB>to obtain the corrected error diffusion pixel G<SUB>ij</SUB>, and then jumping to first step until all pixels being processed. The method provides real time treatment for eliminating moiré and provide smooth image. |
