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Digital image-paper registration error correction through image shear

  • US 10,477,034 B2
  • Filed: 04/09/2018
  • Issued: 11/12/2019
  • Est. Priority Date: 04/09/2018
  • Status: Active Grant
First Claim
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1. A method for correcting an image-paper registration error, comprising:

  • detecting, by a processor, an amount of skew of a paper traveling through a registration system of a printing device;

    determining, by the processor, that the amount of skew is greater than a predefined threshold;

    applying, by the processor, a cross-process direction image shear to a digital image that will be printed on the paper before a missing jet correction is applied to the digital image, wherein the cross-process direction image shear shifts a first number of vertical scanlines in a cross-process direction, wherein the number of vertical scanlines is based on the amount of skew;

    applying, by the processor, the missing jet process to the digital image after the cross-process image shear is applied;

    applying, by the processor, a process direction shear to a second number of horizontal scanlines in a process direction that include the first number of vertical scanlines in the cross-process direction, wherein the second number of horizontal scanlines is based on a function of the amount of skew; and

    controlling, by the processor, a plurality of printheads of the printing device to print the digital image on the paper with the cross-process direction image shear, the missing jet process, and the process direction image shear that is applied.

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