Patent Number: 7,085,016

Title: Method and apparatus for dithering and inversely dithering in image processing and computer graphics

Abstract: The invention provides a method and an apparatus for dithering, and inversely dithering an image. The apparatus makes use of a pixel address and a pixel data to locate a dither reference value from a dither matrix and use the dither reference value to convert an original pixel data having N bits into a dithered pixel data having M bits (N>M). On the other hand, the apparatus for performing an inversely dithering process makes use of the pixel address and the dithered pixel data (M bits) to locate a dither reference value from a dither matrix. Then, the dither reference value is employed to perform an inversely dithering process to recover the dithered pixel data into original pixel data.

Inventors: Lu; Chung-Yen (Taipei, TW), Lee; Ruen-rone (Hsin Chu, TW)

Assignee: Silicon Integrated Systems Corp.

International Classification: H04N 1/405 (20060101)

Expiration Date: 8/01/02018