Color uniformity correction using a scanner
AssigneeHewlett-Packard Development Company, L.P.
InventorsMichal Aharon, Hadas Kogan, Meirav Naaman, Lior Katz
Life of this patent
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Abstract
Techniques for correcting the color uniformity of a laser printer of a digital press or other device are provided. A process for correcting the color uniformity of a laser printer may include scanning a test page by an inline scanner of a digital press, determining scanner signal data from the test page, determining a scanner polynomial fitted to the scanner signal data, and determining a non-uniform coverage polynomial from the scanner polynomial. Additionally, techniques for verifying the linearity of a scanner are also provided.
Claims20
A method, comprising
- scanning a page by a scanner to produce a scanned image;
- determining scanner signal data from the scanned image;
- determining a first polynomial from the scanner signal data;
- determining a second polynomial from the first polynomial;
- and
- correcting a laser power of a laser printer based on the second polynomial.
A method, comprising:
- verifying the linearity of a scanner of a device, wherein the device comprises the scanner and a laser printer;
- analyzing a scanned image produced from a scanned page;
- and
- correcting the color uniformity of the laser printer based on the analysis of the scanned image.
A non-transitory tangible computer-readable medium storing executable code, the executable code comprising instructions for:
- scanning a page by a scanner to produce a scanned image;
- determining scanner signal data from the scanned image;
- determining a first polynomial from the scanner signal data;
- determining a second polynomial from the first polynomial;
- and
- correcting a laser power of a laser printer based on the second polynomial.
Dependencies are inferred from the claim text.