Methods, apparatuses, and systems for verifying printed image and improving print quality

Patent metadata

Field	Value
Publication number	US-2021405938-A1
Application number	US-202117468425-A
Country	US
Kind code	A1
Filing date	Sep 7, 2021
Priority date	Jan 5, 2018
Publication date	Dec 30, 2021
Grant date	—

Abstract

A method for evaluating a print quality of a printed document that is printed by a printer is provided. The printer comprises a pre-print image scanner, a post-print image scanner, and a printhead disposed between the pre-print image scanner and the post-print image scanner. The method comprises generating a pre-printing image of a print media, generating the printed document, generating a post-printing image of the printed document, generating a validation image by comparing the post-printing image with the pre-printing image, and comparing the validation image with the source image.

First claim

1 - 20 . (canceled)

21 . A method for printing an image on print media with a printer, the method comprising:
receiving a reference image from print data for printing the image on the print media; obtaining a captured image of the print media subsequent to the image being printed on the print media by the printer; determining whether the captured image conforms to the reference image based at least in part on determining whether the captured image comprises at least one distortion that is not present in the reference image; and in response to determining that the captured image does not conform to the reference image and comprises the at least one distortion, modifying the print data prior to printing the image on a succeeding print media after the print media.

22 . The method of claim 21 , wherein the captured image comprises a barcode, wherein, when modifying at least part of the print data prior to printing the image on the succeeding print media after the print media, the method further comprises:
adjusting at least a part of the print data associated with the barcode to remove a portion of a bar edge of the barcode.

23 . The method of claim 21 , wherein the captured image comprises a barcode, wherein, when modifying at least part of the print data prior to printing the image on the succeeding print media after the print media, the method further comprises:
adjusting at least a part of the print data associated with the barcode to adding a portion of a bar edge of the barcode.

24 . The method of claim 21 , wherein, when determining whether the captured image conforms to the reference image, the method further comprises:
comparing a horizontal position of the image in the captured image with a horizontal position of the image in the reference image.

25 . The method of claim 24 further comprising:
in response to determining an offset in the horizontal position of the image in the captured image relative to the horizontal position of the image in the reference image, shifting at least a part of the print data by a value of the offset to reposition a succeeding image on the print media.

26 . The method of claim 25 , wherein, when shifting at least the part of the print data, the method further comprises:
inserting a margin in a left portion or a right portion of at least the part of the print data.

27 . The method of claim 25 , wherein, when shifting at least the part of the print data, the method further comprises:
removing a margin in a left portion or a right portion of at least the part of the print data.

28 . The method of claim 21 further comprising:
generating a pre-print image based at least in part on scanning the print media prior to the image being printed on the print media by the printer; and
generating a validation image based least in part on subtracting the pre-print image from the captured image.

29 . The method of claim 28 , further comprising:
comparing the reference image to the validation image; and in response to determining that the validation image does not conform to the reference image, generating a notice indicating a non-conforming image.

30 . The method of claim 21 , further comprising:
obtaining a second captured image of the succeeding print media subsequent to the image being printed on the succeeding print media by the printer; determining whether the second captured image conforms to the reference image based at least in part on determining whether the second captured image comprises at least one second distortion that is not present in the reference image; and in response to determining that the second captured image does not conform to the reference image and comprises the at least one second distortion, modifying the print data prior to printing the image on a second succeeding print media after the succeeding print media.

31 . An apparatus for printing an image on print media, the apparatus comprises a processor configured to:
receive a reference image from print data for printing the image on the print media; obtain a captured image of the print media subsequent to the image being printed on the print media; determine whether the captured image conforms to the reference image based at least in part on determining whether the captured image comprises at least one distortion that is not present in the reference image; and in response to determining that the captured image does not conform to the reference image and comprises the at least one distortion, modify the print data prior to printing the image on a succeeding print media after the print media.

32 . The apparatus of claim 31 , wherein the captured image comprises a barcode, wherein, when modifying at least part of the print data prior to printing the image on the succeeding print media after the print media, the processor is configured to:
adjust at least a part of the print data associated with the barcode to remove a portion of a bar edge of the barcode.

33 . The apparatus of claim 31 , wherein the captured image comprises a barcode, wherein, when modifying at least part of the print data prior to printing the image on the succeeding print media after the print media, the processor is configured to:
adjust at least a part of the print data associated with the barcode to adding a portion of a bar edge of the barcode.

34 . The apparatus of claim 31 , wherein, when determining whether the captured image conforms to the reference image, the processor is configured to:
compare a horizontal position of the image in the captured image with a horizontal position of the image in the reference image.

35 . The apparatus of claim 34 , wherein the processor is configured to:
in response to determining an offset in the horizontal position of the image in the captured image relative to the horizontal position of the image in the reference image, shift at least a part of the print data by a value of the offset to reposition a succeeding image on the print media.

36 . The apparatus of claim 35 , wherein, when shifting at least the part of the print data, the processor is configured to:
insert a margin in a left portion or a right portion of at least the part of the print data.

37 . The apparatus of claim 35 , wherein, when shifting at least the part of the print data, the processor is configured to:
remove a margin in a left portion or a right portion of at least the part of the print data.

38 . The apparatus of claim 31 , wherein the processor is configured to:
generate a pre-print image based at least in part on scanning the print media prior to the image being printed on the print media; and generate a validation image based least in part on subtracting the pre-print image from the captured image.

39 . The apparatus of claim 38 , wherein the processor is configured to:
compare the reference image to the validation image; and in response to determining that the validation image does not conform to the reference image, generate a notice indicating a non-conforming image.

40 . The apparatus of claim 31 , wherein the processor is configured to:
obtain a second captured image of the succeeding print media subsequent to the image being printed on the succeeding print media; determine whether the second captured image conforms to the reference image based at least in part on determining whether the second captured image comprises at least one second distortion that is not present in the reference image; and in response to determining tha

Assignees

• Datamax Oneil Corp

Inventors

• Gutierrez Jose Fernando Sanchez
• Schwallie Ronald
• Celinder Thomas Axel Jonas
• Ackley H Sprague

Classifications

• G06K15/027

  Test patterns and calibration (arrangements for controlling or analysing printing mechanisms of typewriters or selective printing units B41J29/393 takes precedence; colour correction using test pattern analysis in general H04N1/6033) · CPC title

• G06T2207/20224

  Image subtraction · CPC title

• G06F3/1208 Primary

  resulting in improved quality of the output result, e.g. print layout, colours, workflows, print preview · CPC title

• G06F3/1234

  Errors handling and recovery, e.g. reprinting (G06F3/1261 takes precedence) · CPC title

• G06F3/1265

  Printing by reference, e.g. retrieving document/image data for a job from a source mentioned in the job · CPC title