发明名称 COLOR PROCESSING APPARATUS AND COLOR PROCESSING METHOD
摘要 When performing color conversion using a color conversion table which has signal values of an output color space corresponding to grid points dividing an input color space into a plurality of unit cubes, a quadrant to which an input signal belongs is determined, in a chromaticity plane perpendicular to a lightness axis of the input color space. A unit cube to which the input signal belongs is detected in the plurality of unit cubes. The detected unit cube is divided into a plurality of polyhedrons for interpolation operation by a segmentation method corresponding to the determined quadrant. The divide of the detected unit cube is performed along a direction of a diagonal line, which passes through an origin of the chromaticity plane, in a part of the plurality of unit cubes in accordance with the segmentation method.
申请公布号 US2015294486(A1) 申请公布日期 2015.10.15
申请号 US201514681164 申请日期 2015.04.08
申请人 CANON KABUSHIKI KAISHA 发明人 Shimbaru Susumu
分类号 G06T11/00;G06T7/00 主分类号 G06T11/00
代理机构 代理人
主权项 1. A color processing apparatus for performing color conversion using a color conversion table which has signal values of an output color space corresponding to grid points dividing an input color space into a plurality of unit cubes, the apparatus comprising: a determination unit configured to determine a quadrant to which an input signal belongs, in a chromaticity plane perpendicular to a lightness axis of the input color space; a first detection unit configured to detect a unit cube to which the input signal belongs in the plurality of unit cubes; and a division unit configured to divide the detected unit cube into a plurality of polyhedrons for interpolation operation by a segmentation method corresponding to the determined quadrant, wherein the divide of the detected unit cube is performed along a direction of a diagonal line, which passes through an origin of the chromaticity plane, in a part of the plurality of unit cubes in accordance with the segmentation method, wherein at least one of the determination unit, the first detection unit, or the division unit is implemented using a processor.
地址 Tokyo JP