公开(公告)号：EP1716700A1

公开(公告)日：2006-11-02

申请号：EP05718990.4

申请日：2005-02-16

Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics Limited

Inventor： GARDELLA, Pier Luigi ,  BARONE, Massimiliano ,  SWEET, Gary ,  PAU, Danilo ,  HILL, Stephen ,  GODA, Simon

IPC: H04N1/41 ,  H04N1/64 ,  G06T3/40 ,  H04N7/26 ,  G09G5/02

CPC classification number: H04N19/00 ,  G09G3/2051 ,  G09G5/02 ,  H04N1/40087 ,  H04N19/42 ,  H04N19/90

Abstract: An ordered dither method is applied to reduce the chromatic resolution of an image represented by channels R (red), G (green), B (blue) and A (brightness), whereby a first and a second dither matrix is provided, both comprising the same threshold values but arranged in a different spatial distribution. The first dither matrix is applied to the R, B, and A channels, and the second dither matrix is applied to the G channel.