Color calibration
AssigneeHewlett-Packard Development Company, L.P.
InventorHuanzhao Zeng
Life of this patent
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Abstract
Among various embodiments of the present disclosure, color calibration can be performed on a printing apparatus by using a preconfigured color map coded to reduce a color difference of a selected reference color sample relative to a color standard, where the selected reference color sample substantially matches a first test color sample printed by the printing apparatus. Installing the preconfigured color map can enable recalibrating the printing apparatus to use the preconfigured color map in adjusting an amount of a number of colorants utilized in printing a second test color sample to reduce the number of color differences of the second test color sample relative to the color standard.
Claims26
A method of color calibration, comprising:
- printing a first test color sample with a printing apparatus on a print medium using a nominal color setting;
- selecting, from a set of reference color samples not printed with the printing apparatus, a reference color sample appearing to substantially match the first test color sample, the selected reference color sample indicative of a particular preconfigured color map, in a set of preconfigured color maps, coded to reduce a color difference of the selected reference color sample relative to a color standard, wherein each of the preconfigured color maps in the set corresponds to one of the set of reference color samples;
- and
- recalibrating the printing apparatus when the selected reference color sample differs from the color standard, where the recalibrating is performed by replacing a color map used to print the first test color sample with the particular preconfigured color map, and wherein the preconfigured color maps in the set are coded prior to the selecting of the reference color sample.
A medium having executable instructions stored thereon for executing a method for color calibration on a printing apparatus comprising:
- using a preconfigured color map coded to reduce a color difference of a selected reference color sample relative to a color standard, where the selected reference color sample is selected from a set of color reference samples not printed by the printing apparatus so as to substantially match a first test color sample printed by the printing apparatus, wherein the preconfigured color map is one of a set of color maps coded prior to identifying the selected reference color sample, wherein each color map in the set of color maps corresponds to one of the set of reference color samples, and wherein the selected reference color sample is indicative of the preconfigured color map;
- and
- installing the preconfigured color map to replace a color map used to print the first test color sample and recalibrate the printing apparatus to use the preconfigured color map in adjusting an amount of a number of colorants utilized in printing a second test color sample, where adjusting reduces the number of color differences of the second test color sample relative to the color standard.
A color calibration system, comprising:
- a printing apparatus to print a test color sample on a print medium using a nominal color setting;
- means to install instructions that are coded and stored in a preconfigured firmware unit, where the preconfigured instructions contain a preconfigured color map for replacement of a color map used in printing the test color sample;
- and
- means to execute recalibration of the printing apparatus to reduce a color difference of a selected reference color sample relative to a color standard, where reduction of the color difference is included in the instructions that are coded and stored in the preconfigured firmware unit, wherein the selected reference color sample is selected from a set of color reference samples to substantially match the test color sample, wherein the set of color reference samples are not printed on the printing apparatus, wherein the preconfigured color map is one of a set of color maps in the printing apparatus coded prior to choosing the selected reference color sample, wherein each color map in the set of color maps corresponds to one of the set of reference color samples, and wherein the selected reference color sample is indicative of the preconfigured color map.
Dependencies are inferred from the claim text.