Print artifact compensation mechanism

Patent metadata

Field	Value
Publication number	US-11818318-B2
Application number	US-202217684266-A
Country	US
Kind code	B2
Filing date	Mar 1, 2022
Priority date	Mar 1, 2022
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

A system is disclosed. The system includes at least one physical memory device to store compensation logic and one or more processors coupled with the at least one physical memory device to execute the compensation logic to generate transfer functions for each of a plurality of color planes to compensate for non-functioning pel forming elements, wherein the transfer functions are generated based on ink deposition functions for groups of pel forming elements including functioning pel forming elements and the non-functioning pel forming elements, wherein the transfer functions transform input digital counts and the ink deposition functions represent output ink amount versus input digital count.

First claim

What is claimed is:

1. A system comprising:
at least one physical memory device to store compensation logic; and
one or more processors coupled with the at least one physical memory device to execute the compensation logic to:
generate transfer functions for each of a plurality of color planes to compensate for non-functioning pel forming elements, wherein the transfer functions are generated based on ink deposition functions for groups of pel forming elements including functioning pel forming elements and the non-functioning pel forming elements, wherein the transfer functions transform input digital counts, and wherein the ink deposition functions represent output ink amount versus input digital count.

2. The system of claim 1 , wherein the compensation logic further to:
generate a first ink deposition function for each of the plurality of color planes, wherein the first ink deposition function is associated with a first group of pel forming elements;
generate a second ink deposition function for each of the plurality of color planes, wherein the second ink deposition function is associated with the first group of pel forming elements further comprising one or more non-functioning pel forming elements;
generate a third ink deposition function for each of the plurality of color planes, wherein the third ink deposition function is associated with a second group of pel forming elements; and
generate the transfer functions for each of the plurality of color planes based on the first ink deposition function, the second ink deposition function and the third ink deposition function.

3. The system of claim 2 , wherein the first group comprises a local group of pel forming elements and the second group comprises a non-local group of pel forming elements.

4. The system of claim 3 , wherein generating the first, second and third ink deposition functions comprises generating a first Gaussian profile associated with the local group of pel forming elements, generating a second Gaussian profile associated with the local group of pel forming elements having the one or more non-functioning pel forming elements and generating a third Gaussian profile associated with the non-local group of pel forming elements.

5. The system of claim 4 , wherein generating the first, second and third ink deposition functions further comprises combining the first, second and third Gaussian profiles to generate local ink contribution data for each of the plurality of color planes.

6. The system of claim 5 , wherein generating the first, second and third ink deposition functions further comprises combining the local ink contribution data with large-scale ink contribution data to generate large-scale ink deposition data that matches the large-scale ink contribution data.

7. The system of claim 1 , wherein the ink deposition functions are associated with a spacing amount for the non-functioning pel forming elements and the functioning pel forming elements.

8. The system of claim 1 , wherein an ink deposition function further comprises a function of a pel forming element position and input digital count.

9. The system of claim 2 , wherein the first, second and third ink deposition functions correspond to a first halftone design.

10. The system of claim 3 , wherein the compensation logic applies the transfer functions to generate a fourth ink deposition function for each of the plurality of color planes wherein the fourth ink deposition function comprises an ink deposition function for the local group of pel forming elements having the one or more non-functioning pel forming elements.

11. The system of claim 10 , wherein the compensation logic verifies whether a difference between the fourth ink deposition function and the second ink deposition function is within a predetermined threshold.

12. The system of claim 11 , wherein the compensation logic validates an acceptable compensation upon determining that the difference is within the predetermined threshold.

13. The system of claim 1 , further comprising a print engine comprising a plurality of pel forming elements.

14. A method comprising:
generating transfer functions for each of a plurality of color planes to compensate for non-functioning pel forming elements, wherein the transfer functions are generated based on ink deposition functions for groups of pel forming elements including functioning pel forming elements and the non-functioning pel forming elements, wherein the transfer functions transform input digital counts, and wherein the ink deposition functions represent output ink amount versus input digital count.

15. The method of claim 14 , further comprising:
generating a first ink deposition function for each of the plurality of color planes, wherein the first ink deposition function is associated with a first group of pel forming elements;
generating a second ink deposition function for each of the plurality of color planes, wherein the second ink deposition function is associated with the first group of pel forming elements further comprising one or more non-functioning pel forming elements;
generating a third ink deposition function for each of the plurality of color planes, wherein the third ink deposition function is associated with a second group of pel forming elements; and
generating the transfer functions for each of the plurality of color planes based on the first ink deposition function, the second ink deposition function and the third ink deposition function.

16. The method of claim 15 , wherein the first group comprises a local group of pel forming elements and the second group comprises a non-local group of pel forming elements.

17. The method of claim 16 , wherein generating the first, second and third ink deposition functions comprises:
generating a first Gaussian profile associated with the local group of pel forming elements;
generating a second Gaussian profile associated with the local group of pel forming elements having the one or more non-functioning pel forming elements; and
generating a third Gaussian profile associated with the non-local group of pel forming elements.

18. At least one non-transitory computer readable medium having instructions stored thereon, which when executed by one or more processors, cause the processors to:
generate transfer functions for each of the plurality of color planes to compensate for non-functioning pel forming elements, wherein the transfer functions are generated based on ink deposition functions for groups of pel forming elements including functioning pel forming elements and the non-functioning pel forming elements,
wherein the transfer functions transform input digital counts, and
wherein the ink deposition functions represent output ink amount versus input digital count.

19. The computer readable medium of claim 18 , having instructions stored thereon, which when executed by one or more processors, cause the processors to:
generate a first ink deposition function for each of a plurality of color planes, wherein the first ink deposition function is associated with a first group of pel forming elements;
generate a second ink deposition function for each of the plurality of color planes, wherein the second ink deposition function is associated with the first group of pel forming elements further comprising one or more non-functioning pel forming elements;
generate a third ink deposition function for each of the plurality of color planes, wherein the third ink deposition function is associated with a second group of pel forming elements;

Assignees

• Stanich Mikel
• Kailey Walter F
• Gurudath Nikita
• Zhang Ziling
• Skogen Brandon
• Ricoh Co Ltd

Inventors

• Stanich Mikel
• Kailey Walter F
• Gurudath Nikita
• Zhang Ziling
• Skogen Brandon

Classifications

• H04N1/52 Primary

  Circuits or arrangements for halftone screening · CPC title

• G06K15/102

  using ink jet print heads · CPC title

• H04N1/0005

  in service, i.e. during normal operation · CPC title

• H04N1/00023

  Colour systems · CPC title

• H04N1/00037 Primary

  Detecting, i.e. determining the occurrence of a predetermined state (H04N1/00031 takes precedence) · CPC title