Patent ID: 6118549
Filing Date: 2000-09-12
Classification: H04N

Abstract:
A color conversion device, comprising:a region judging section for setting N+3 axes in total with three axes orthogonal to each other designating the origin as a center and N lines separately from said three orthogonal axes in a first three-dimensional color space, for arranging a predetermined number of representative points discretely on said N+3 axes, and for discriminating in which region an input color signal value belongs from among a plurality of regions where each arbitrary coordinate on said first three-dimensional color space is divided into a plurality of regions based on a distance to said N+3 axes;a representative points selecting section for obtaining three representative points by selecting one representative point near said input color signal value on three axes constituting the boundary of said discriminated region;a look-up table for indicating coordinates on a second three-dimensional color space to which said three representative points are converted to; andan interpolation section for performing color conversion of the input color signal value using said three representative points, thereby converting arbitrary coordinates on said first three-dimensional color space to coordinates on said second three-dimensional color space.