公开(公告)号：US09900466B2

公开(公告)日：2018-02-20

申请号：US15437163

申请日：2017-02-20

申请人： RISO KAGAKU CORPORATION

发明人： Daisuke Fujiwara ,  Yukio Yoshikawa

IPC分类号： H04N1/405 ,  G06K15/00 ,  H04N1/40 ,  G06K15/02

CPC分类号： H04N1/4053 ,  G06K15/021 ,  G06K15/028 ,  G06K15/1836 ,  G06K15/1847 ,  G06K2215/0042 ,  G06K2215/0097 ,  H04N1/4052 ,  H04N2201/0082

摘要： An image processing apparatus includes an image processor that performs error diffusion processing by applying an error diffusion matrix to multi-valued image data having pixels two-dimensionally arranged, so as to convert the multi-valued image data into binary image data. The binarization unit applies an error diffusion matrix in which the diffusion coefficient of a pixel diagonal to a focused-on pixel is greater than those of other pixels.