System and method for adjustment of coverage parameters for different colors in image data
First Claim
Patent Images
1. A method of operating a printer comprising:
- identifying a first plurality of coverage parameters for a first pixel of continuous tone (contone) image data, each coverage parameter corresponding to one color separation in a plurality of color separations;
reducing each of the first plurality of coverage parameters by a first amount in response to a combination of at least two of the first plurality of coverage parameters being below a predetermined threshold;
identifying a second plurality of coverage parameters for a second pixel of the contone image data, each coverage parameter in the second plurality of coverage parameters corresponding to one color separation in the plurality of color separations;
reducing each of the second plurality of coverage parameters by a second amount, the second amount being less than the first amount, in response to a combination of the at least two of the second plurality of coverage parameters exceeding the predetermined threshold;
generating half-tone image data corresponding to the first pixel and the second pixel; and
operating a marking unit with reference to the half-tone image data to form marks corresponding to the first pixel and the second pixel on an image receiving surface.
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Abstract
A method of operating a printer includes reducing a first plurality of coverage parameters in a first continuous tone (contone) pixel by a predetermined amount if a combination of at least two of the coverage parameters is below a predetermined threshold and reducing a second plurality of coverage parameters in a second pixel by a smaller amount if the combination of coverage parameters in the second pixel is greater than the predetermined threshold. The method further includes generating half-tone image data from the first and second pixels and forming printed marks corresponding to the first and second pixels on an image receiving surface.
38 Citations
20 Claims
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1. A method of operating a printer comprising:
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identifying a first plurality of coverage parameters for a first pixel of continuous tone (contone) image data, each coverage parameter corresponding to one color separation in a plurality of color separations; reducing each of the first plurality of coverage parameters by a first amount in response to a combination of at least two of the first plurality of coverage parameters being below a predetermined threshold; identifying a second plurality of coverage parameters for a second pixel of the contone image data, each coverage parameter in the second plurality of coverage parameters corresponding to one color separation in the plurality of color separations; reducing each of the second plurality of coverage parameters by a second amount, the second amount being less than the first amount, in response to a combination of the at least two of the second plurality of coverage parameters exceeding the predetermined threshold; generating half-tone image data corresponding to the first pixel and the second pixel; and operating a marking unit with reference to the half-tone image data to form marks corresponding to the first pixel and the second pixel on an image receiving surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A printer comprising:
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a marking unit configured to deposit marking agents having a plurality of colors onto an image receiving surface; and a controller operatively connected to the marking unit, the controller being configured to; identify a first plurality of coverage parameters for a first pixel of continuous tone (contone) image data, each coverage parameter corresponding to one color separation in a plurality of color separations; reduce each of the first plurality of coverage parameters by a first amount in response to a combination of at least two of the first plurality of coverage parameters being below a predetermined threshold; identify a second plurality of coverage parameters for a second pixel of the contone image data, each coverage parameter in the second plurality of coverage parameters corresponding to one color separation in the plurality of color separations; reduce each of the second plurality of coverage parameters by a second amount, the second amount being less than the first amount, in response to a combination of the at least two of the second plurality of coverage parameters exceeding the predetermined threshold; generate half-tone image data corresponding to the first pixel and the second pixel; and operate a marking unit with reference to the half-tone image data to form marks corresponding to the first pixel and the second pixel on an image receiving surface. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of operating a printer comprising:
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identifying a plurality of coverage parameters for a pixel of continuous tone (contone) image data, each coverage parameter in the pixel corresponding to a value in a contone plane for one of a plurality of color separations; modifying an adjustment value for the coverage parameters in the pixel in response to at least one of the identified plurality of coverage parameters for the pixel being greater than a predetermined threshold; and operating a marking unit to deposit a plurality of colorants that correspond to the plurality of color separations onto an image receiving surface with reference to the pixel in the contone plane and the modified adjustment value. - View Dependent Claims (18, 19, 20)
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Specification