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US 2008/0291480 A1Published application
Image-based color printer fractal gamut extensions achieved with process set point adjustment
AssigneeXerox Corporation
InventorsLalit Keshav Mestha, Palghat Ramesh
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Abstract
A color management system is provided for enabling imaging of selected colors called spot colors by dynamically adjusting the normal printer gamut to achieve a color gamut extension. Developed toner mass may be increased or decreased by changing ROS laser intensity. Such adjustment can occur on a pixel-by-pixel basis for within page and within sections of the image gamut extension.
Claims14
A method for adjusting a color printer gamut of a printer to encompass:
- a selected spot color comprising:
- operating the printer in a nominal printer gamut associated with a nominal set of process parameter set points;
- identifying the selected spot color as out of the nominal printer gamut;
- adjusting the process parameter set points by changing laser intensity of the raster output scanner (ROS) to vary a toner mass comprising the selected spot color;
- and,
- returning the process parameter set points to the nominal set for color printing of pixels other than the selected spot color.
3 more elements
A printer control system for effecting image-based fractal gamut extensions by selective adjustment of a raster output scanner (ROS) system, comprising:
- a charging and exposure system for imposing a latent image on a photoreceptor;
- and,
- fractal gamut processor for adjusting laser intensity of the ROS whereby toner mass is varied to achieve a selected spot color outside of nominal printer gamut.
Dependencies are inferred from the claim text.