Patent ID: 6765695
Filing Date: 2004-07-20
Classification: H04N

Abstract:
A method for processing color digital data, comprising the steps of:(a) receiving color digital data in the form of a plurality of digital elements, each digital element being represented in a first color space having a plurality of first base color components and being defined by n bits/base color component, 1&lE;n; (b) performing quantization and multi-level dithering using a pre-defined dither matrix on the received digital elements to distribute a quantization error within the spatial domain, wherein the quantization and multi-level dithering reduces n to m, where m(c) performing color matching by converting the representation of the digital elements from the first color space to a second color space having a plurality of second base color components using only a look-up table operation; and (d) adaptively filtering the color digital data based on a predetermined step size of the quantization; wherein step (c) is carried out either before or after step (d).