| 摘要 |
A method of halftoning digitized grey value images divided into pixels, comprising successive thresholding of grey values of the pixels and transportation of a quantization error made in these conditions for each pixel to at least one neighbouring pixel still to be thresholded, by adding the quantization error or part thereof to a grey value of the at least one pixel, the method comprising dividing the pixels into groups, group-wise thresholding the grey values of the pixels divided into groups, and transportation of the quantization error from a pixel of a group to solely pixels of at least one other group. Also relates to an image processing device for performing the method. <IMAGE> |
