Patent ID: 6268867
Filing Date: 2001-07-31
Classification: H04N

Abstract:
A color correction device which converts an input signal from a first signal coordinate system to a second coordinate system, comprising:an input block judging means which selects a block of divided input space corresponding to an input signal system to which the input signal belongs;an input block internal position calculating means calculating a position in the block selected by said input block judging means at which the input signal is located;an output table referring means obtaining from an output table a value of each apex of a block in an output space corresponding to the block selected by said input block judging means; andan output signal generating means generating an output signal using the value of each apex of the block in the output space obtained by said output table referring means and the internal position obtained by said input block internal position calculating means;wherein the divided input space is divided at division points of each locus of an achromatic color present in a center part of a color region and a plurality of chromatic colors present in a peripheral part of the color region, and includes divided blocks in which gradation in the lightness direction for each locus is separated, said input block judging means and selects the block in which the input signal is judged to be inside every plane of the divided block.