Patent ID: 7054038
Filing Date: 2006-05-30
Classification: H04N

Abstract:
1. A multi-color dithering method for the reproduction of color input images, the method being characterized by the use of a two-dimensional dither function, the use of an arbitrary number of primary colors and the use of partitions representing relative amounts of primary colors, the method comprising the steps of: (a) defining a two dimensional dither function G(x,y); (b) choosing a set of primary colors {C (c) initiating a neighbor finding procedure which renders neighboring primary colors {C (d) computing the primary color of each output image pixel O(x,y) by a set of substeps comprising: (i) locating in the input color image an input color location (x′,y′) associated to the output image pixel O(x,y) and computing its corresponding color C(x′,y′); (ii) finding N neighbor primary colors {C (iii) computing the amount S (iv) determining the output primary color O(x,y) at output pixel (x,y) by locating at each position (x,y) a partition P (e) outputting the multi-color dithered output image on an output device.