公开(公告)号：EP1298916A3

公开(公告)日：2005-09-21

申请号：EP02022213

申请日：2002-10-01

申请人： XEROX CORP

发明人： LOCE ROBERT P ,  BRANCIFORTE MICHAEL ,  XU BEILEI

IPC分类号： B41J2/52 ,  G06T5/00 ,  H04N1/405 ,  H04N1/40

CPC分类号： H04N1/4052

摘要： Error is distributed to pixels neighboring a pixel of interest based on a ranking of the neighboring pixels. The ranking is based on pixel values of the neighboring pixels. Optionally a spatial weighting is applied to the pixel values before ranking, to provide a preference for pixels closest to the pixel of interest or to a particular portion of a related halftone screen. Rank order based error diffusion provides compact halftone dots without patterning artifacts. An image processing system operative to perform rank order error diffusion includes a pixel ranker and an error diffuser. In a xerographic environment the image processing system includes a xerographic printer.