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1. 发明专利

JPH0799587A METHOD AND DEVICE FOR CONVERTING COLOR 失效
公开(公告)号：JPH0799587A
公开(公告)日：1995-04-11
申请号：JP23620593
申请日：1993-09-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KANAMORI KATSUHIRO , YAMADA OSAMU , KIMURA HIDETO , IIKAWA RIKA , FUMOTO TERUO , KODERA HIROAKI
IPC分类号： H04N1/60 , H04N1/46
摘要： PURPOSE:To reduce the error of a black color production and to decrease the capacity of a color conversion table memory by setting a color space formed along a diagonal axis direction of a space of an input color signal so as to be included by an oblique solid group so as to interpolate an output corresponding to an input color with an output of each apex. CONSTITUTION:A picture element input section 101 separates picture input signal R, G, B into high-order bits RH, GH, BH and lower-order bits RL, GL, BL. A comparator part 103 compares the RL, BL and the BL, GL and an adder part 115 adds the comparison results C1, C2 to the RH, BH and the sum is inputted to a memory address generating part 102, in which addresses in a color conversion table memory 107 are generated. A weight generating part 104 outputs differences RL-GL and BL-GL and the GL. An oblique triangular prism interpolation arithmetic part 110 divides a 3 primary color input space such as RGB or CMY into unit solid areas and sets the input color space entire area to be included by an oblique triangular prism by estimating the oblique triangular prism made of apexes forming an upper bottom and a lower bottom side on each unit solid adjacent each other along the diagonal axis direction of the input space and an output corresponding to an optional input color is interpolated by using an output of each apex of the triangular prism.

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