Patent ID: 6825953
Filing Date: 2004-11-30
Classification: G06T,H04N

Abstract:
A method for creating a scaled halftoned destination pixel image from a source pixel image portion that comprises plural source pixels, said method comprising the steps of:a) creating a scaled set of matrix values; b) depending upon a determined halftone relationship of source pixel and each of said scaled set of matrix values, creating a scaled set of destination pixels, each respective destination pixel value dependent upon a relationship of a value of said source pixel and a corresponding matrix value; and c) repeating step b) for each source pixel, using said scaled set of matrix values, and arranging said scaled set of matrix values to create a determined halftone pattern over said source pixels that exhibits a desired repeating pattern with a repetition frequency that is less than a repetition frequency of said source pixels, each said scaled set of destination pixels produced thereby exhibiting a reduced tonal error as a result of use of said scaled set of matrix values for each said source pixel.