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US 7,443,536 B2Granted
Method of generating color separation data and image processing apparatus
AssigneeCanon Kabushiki Kaisha
InventorKosei Takahashi
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AssigneeCanon Kabushiki Kaisha
InventorKosei Takahashi
Estimating the term…
In a process of generating color separation data, if printing is performed with use of a particular color printing material in addition to basic printing material, the process can effectively use a gamut area which can be enlarged with use of the particular color printing material. Specifically, the process calculates a granularity for each equal-lightness line. For each of such equal-lightness lines, color separation data is obtained which relates to the mixture ratio of the yellow ink to the light magenta ink corresponding to the best granularity. Then, data on lattice points corresponding to the equal-lightness line is changed with the obtained color separation data on the mixture ratio of the yellow ink to the light magenta ink which corresponds to the best granularity. Such obtained color separation data allows the yellow and light magenta inks and the particular color ink red to be used in a low saturation part.
A color separation data generation method for generating color separation data, which is used for a printing apparatus and corresponds to printing materials of basic colors, a printing material of a light color having lower color material concentration than a basic color, and a printing material of a particular color except the basic color, for a predetermined gamut,
An image processing apparatus that generates color separation data, which is used for a printing apparatus and corresponds to printing materials of basic colors, a printing material of a light color having lower color material concentration than a basic color, and a printing material of a particular color except the basic color, for a predetermined gamut,
A computer-readable medium storing a program stored in a computer readable medium that is used in a information processing apparatus for executing color separation data generation process that generates color separation data, which is used for a printing apparatus and corresponds to printing materials of basic colors, a printing material of a light color having lower color material concentration than a basic color, and a printing material of a particular color except the basic color, for a predetermined gamut,
Dependencies are inferred from the claim text.