Color reproduction system for making color display of four or more primary colors based on input tristimulus values
First Claim
1. A color reproduction system comprising:
- a color image display unit capable of displaying a color image of at least four primary colors; and
, a color converting unit for converting input tristimulus values into color image signals of respective primary colors of the color image display unit, wherein the color converting unit includes;
an area deciding section for deciding which one of a plurality of color conversion areas the input tristimulus values belong to in a three-dimensional color space; and
a color image signal calculating section for converting the input tristimulus values into the color image signals of the respective primary colors based on color conversion parameters corresponding to the color conversion area decided by the area deciding section, and wherein the color converting unit obtains a color image signal that is larger than 0 for at least four primary colors in at least one of the color conversion areas.
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Abstract
A color reproduction system includes a color image display unit capable of displaying a color image of four or more primary colors, and a color converting unit for converting input three-primary color signals into color image signals of respective primary colors of the color image display unit. The color converting unit includes an area deciding section that decides a color conversion area to which the input three-primary color signals belong in a three-dimensional color space, and a color image signal calculating section that converts the input three-primary color signals into color image signals of respective primary colors based on color conversion parameters corresponding to a color conversion area decided by the area deciding section.
109 Citations
15 Claims
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1. A color reproduction system comprising:
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a color image display unit capable of displaying a color image of at least four primary colors; and
,a color converting unit for converting input tristimulus values into color image signals of respective primary colors of the color image display unit, wherein the color converting unit includes;
an area deciding section for deciding which one of a plurality of color conversion areas the input tristimulus values belong to in a three-dimensional color space; and
a color image signal calculating section for converting the input tristimulus values into the color image signals of the respective primary colors based on color conversion parameters corresponding to the color conversion area decided by the area deciding section, and wherein the color converting unit obtains a color image signal that is larger than 0 for at least four primary colors in at least one of the color conversion areas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
the area deciding section decides a divided area for converting the input tristimulus values from a reproducible color space that has been divided into a plurality of tetrahedral areas in advance, and calculates a linear signal based on the input tristimulus values and the profile data according to the decided divided area, and the color image signal calculating section carries out a predetermined gradation correction and calculates an input signal to the color image display unit.
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13. A color reproduction system according to claim 1, wherein at least one of the color conversion areas is a polyhedron which includes a tristimulus value that is obtained by mixing at least four primary colors, as a vertex.
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14. A color reproduction system according to claim 13, wherein at least one of the color conversion areas is one of a hexahedron and a pyramid which includes a tristimulus value that is obtained by mixing at least four primary colors, as a vertex.
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15. A color reproduction system according to claim 1, wherein said color image display unit includes a plurality of color image display devices each corresponding to a different one of three main primary colors.
Specification