Color cast reduction system and method
AssigneeHewlett-Packard Development Company, L.P.
InventorsJuan Uroz, Johan Lammens, Jacint Humet Pous, Michel Encrenaz
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Abstract
In one embodiment, a print system includes an anticipated ambient lighting selector to allow selection of an anticipated ambient lighting. A rendering module is configured to map a print job into raster data configured to reduce color cast in gray output when displayed under the anticipated ambient lighting.
Claims30
A system, comprising:
- an anticipated ambient lighting selector to select an anticipated ambient lighting;
- and
- a rendering module to map input print data into output print data configured to reduce color cast in gray output when displayed under the anticipated ambient lighting.
A processor-readable medium comprising processor-executable instructions for printing neutral grays, the processor-executable instructions comprising instructions for:
- selecting an anticipated ambient lighting condition;
- and
- rendering, based on the anticipated ambient lighting condition, input print data into output print data, wherein the output print data is configured to reduce color cast of gray output when viewed under the anticipated ambient lighting condition.
A method of printing, comprising:
- selecting an anticipated ambient lighting;
- reducing color cast seen in gray output displayed under the anticipated ambient lighting;
- and
- smoothing transitions between the gray output and near gray output by reducing gradually an extent to which gamut mapping intended to reduce color cast of the gray output under the anticipated ambient lighting is applied to the near gray output.
A print system, comprising:
- means for selecting an anticipated ambient lighting;
- means for reducing color cast in gray output caused by the anticipated ambient lighting;
- and
- means for reducing gradually an extent to which gamut mapping intended to reduce color cast caused by the anticipated ambient lighting is applied to near gray output.
A print system, comprising:
- data indicating an anticipated ambient lighting;
- and
- a rendering module to translate input print data into output print data according to the anticipated lighting, wherein gray output is neutralized to reduce color cast under the anticipated ambient lighting and wherein an extent to which near gray output is neutralized to reduce color cast caused by the anticipated lighting is reduced as a function of the chromatic content of the near gray output.
A processor-readable medium comprising processor-executable instructions for:
- operating a user interface to allow user selection of a rendering intent;
- associating the selected rendering intent with an anticipated ambient lighting;
- and
- RIPing input print data to produce output print data wherein color cast in gray and near gray output is reduced when viewed in the anticipated ambient lighting.
A photo printer, comprising:
- an ambient lighting selector to select an anticipated ambient lighting;
- an ambient lighting look-up table to correct gray output for color cast resulting from the anticipated ambient lighting, and to correct near gray output for color cast resulting from the anticipated ambient lighting as a function of an intended color of the near gray output.
Dependencies are inferred from the claim text.