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US 2008/0291479 A1Published application
Spot color printing with non-standard gamuts achieved with process set point adjustment
AssigneeXerox Corporation
InventorsLalit Keshav Mestha, Tonya L. Love, Ta-Chen Hsu
Life of this patent
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Abstract
A color management system is provided for enabling imaging of selected colors called spot colors that document dynamically adjusting the normal printer gamut to achieve extended colors. Developed mass may be increased or decreased by changing set points such as a photoreceptor roll charge, development bias or raster output scanner laser power.
Claims14
A method for adjusting a color printer gamut of a printer to encompass a selected spot color, comprising:
- identifying the selected spot color as not producible with a first color gamut of the printer;
- comparing the selected spot color to predetermined spot colors identified as reproducible by the printer in a color set point index table;
- identifying a set of set points from the set point index table corresponding to a nearest color to the selected spot color;
- setting the printer to the identified set of set points;
- and,
- calibrating the printer to print the selected spot color.
3 more elements
An image based method for extending a color printer gamut of a printer to encompass a selected spot color, including:
- defining the selected spot color as out of a normal color gamut of the printer and reproducible with an extended color gamut;
- identifying the selected spot color as included on an image to be printer;
- identifying a color rendition dictionary corresponding to the extended color gamut for reproducing the selected spot color and further identifying process set points to achieve the extended color gamut;
- setting the printer to the identified process set points;
- and
- printing the image.
3 more elements
Dependencies are inferred from the claim text.