Granted Patent B2

US 12,724,994 · App. 18/601,475 · Granted Sep 1, 2026

Inventors: Scott R. Johnson (Boulder, CO); Pallavi Premkumar (Boulder, CO); Ziling Zhang (Boulder, CO); Mikel Stanich (Boulder, CO)

Assignee: RICOH COMPANY, LTD.

G06K15/027G06F3/1258G06F3/1259G06K2215/101

Abstract

Claims (53)

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:

receive print response measurement data corresponding to print image printed on a print substrate with a transfer function applied to print image data that defines the print image;

apply a current compensation transfer function to the print response measurement data to generate first processed print response data;

determine whether an absolute difference between the first processed print response data and a target response exceeds a first threshold; and

generate an updated compensation transfer function based on the first processed print response data and the target response upon a determination that the absolute difference exceeds a first threshold.

2 . The system of claim 1 , wherein the print response measurement data includes data corresponding to each of a plurality of measurement samples; and generating the first processed print response data further comprises averaging the data corresponding to each of the plurality of measurement samples.

3 . The system of claim 2 , wherein the compensation logic further to:

generate second processed print response data by applying the updated compensation transfer function to the print response measurement data;

determine a second response difference comprising an absolute value of the difference between the second processed print response data and a second threshold;

generate an alert upon a determination that the second response difference exceeds a second threshold; and

bypass the alert upon a determination that the second response difference does not exceed a second threshold.

4 . The system of claim 1 , wherein generating the updated compensation transfer function comprises:

generating an intermediate compensation transfer function based on the first processed print response data; and

generating the updated compensation transfer function based on the intermediate compensation transfer function and the target response.

5 . The system of claim 4 , wherein the compensation logic stores the updated compensation transfer function with compensation metadata.

6 . The system of claim 5 , wherein the compensation logic further to retrieve the updated compensation transfer function using the compensation metadata.

7 . The system of claim 3 , wherein at least one physical memory device to store a graphical user interface (GUI) and the one or more processors coupled with the at least one physical memory device to execute the GUI to display the alert.

8 . The system of claim 1 , further comprising one or more print engines.

9 . The system of claim 1 wherein the print response measurement data comprises optical density data.

10 . At least one non-transitory computer readable medium having instructions stored thereon, which when executed by one or more processors, cause the processors to:

receive print response measurement data corresponding to print image printed on a print substrate with a transfer function applied to print image data that defines the print image;

apply a current compensation transfer function to the print response measurement data to generate first processed print response data;

determine whether an absolute difference between the first processed print response data and a target response exceeds a first threshold; and

generate an updated compensation transfer function based on the first processed print response data and the target response upon a determination that the absolute difference exceeds a first threshold.

11 . The computer readable medium of claim 10 , wherein the print response measurement data includes data corresponding to each of a plurality of measurement samples; and generating the first processed print response data further comprises averaging the data corresponding to each of the plurality of measurement samples.

12 . The computer readable medium of claim 11 , having instructions stored thereon, which when executed by one or more processors, further cause the processors to:

generate second processed print response data by applying the updated compensation transfer function to the print response measurement data;

determine a second response difference comprising an absolute value of the difference between the second processed print response data and a second threshold;

generate an alert upon a determination that the second response difference exceeds a second threshold; and

bypass the alert upon a determination that the second response difference does not exceed a second threshold.

13 . The computer readable medium of claim 10 , wherein generating the updated compensation transfer function comprises:

generating an intermediate compensation transfer function based on the first processed print response data; and

generating the updated compensation transfer function based on the intermediate compensation transfer function and the target response.

14 . A method comprising:

receiving print response measurement data corresponding to print image printed on a print substrate with a transfer function applied to print image data that defines the print image;

applying a current compensation transfer function to the print response measurement data to generate first processed print response data;

determining whether an absolute difference between the first processed print response data and a target response exceeds a first threshold; and

generating an updated compensation transfer function based on the first processed print response data and the target response upon a determination that the absolute difference exceeds a first threshold.

15 . The method of claim 14 , wherein generating the first processed print response data further comprises applying a current compensation transfer function to the print response measurement data.

16 . The method of claim 14 , wherein the print response measurement data includes data corresponding to each of a plurality of measurement samples; and generating the first processed print response data further comprises averaging the data corresponding to each of the plurality of measurement samples.

17 . The method of claim 16 , further comprising:

generating second processed print response data by applying the updated compensation transfer function to the print response measurement data;

determine a second response difference comprising an absolute value of the difference between the second processed print response data and a second threshold;

generating an alert upon a determination that the second response difference exceeds a second threshold; and

bypassing the alert upon a determination that the second response difference does not exceed a second threshold.

18 . The method of claim 14 , wherein generating the updated compensation transfer function comprises:

generating an intermediate compensation transfer function based on the first processed print response data; and

generating the updated compensation transfer function based on the intermediate compensation transfer function and the target response.

19 . The computer readable medium of claim 12 , further comprising displaying an alert.

20 . The computer readable medium of claim 12 , wherein the print response measurement data comprises optical density data.

21 . The method of claim 17 wherein the print response measurement data comprises optical density data.

Assignments (1)

Continuity (1)

References Cited (68)