Method, apparatus, and system for characterizing an optical system

Patent metadata

Field	Value
Publication number	US-11893449-B2
Application number	US-202117454148-A
Country	US
Kind code	B2
Filing date	Nov 9, 2021
Priority date	Jan 5, 2018
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

Techniques for characterizing an optical system (for example, a printer verifier) are provided. In this regard, the optical system may be characterized for scanning a printed image. The characterization of the optical system includes determining an effective aperture size of the optical system, and correspondingly an effective resolution at which the optical system can be configured to scan a portion of the printed image according to verification requirements.

First claim

The invention claimed is:

1. A computer-implemented method comprising:
determining characteristic data of an image;
determining, based on the characteristic data, a virtual aperture size of an optical system;
causing the optical system to scan the image at a resolution based on a physical aperture size of the optical system; and

modifying the resolution of the scanned image based on the virtual aperture size of the optical system.

2. The computer-implemented method of claim 1 , wherein the image includes an indicia, and wherein the characteristic data includes at least a size of the indicia and a type of the indicia.

3. The computer-implemented method of claim 1 , wherein the physical aperture size is less than the virtual aperture size.

4. The computer-implemented method of claim 1 , wherein modifying the resolution of the scanned image comprises blurring the scanned image during the optical system scanning the image.

5. The computer-implemented method of claim 1 , wherein modifying the resolution of the scanned image comprises blurring the scanned image after the optical system scanning the image.

6. The computer-implemented method of claim 1 , wherein the virtual aperture size is determined based on a reference table that includes a mapping between a resolution at which the image is to be scanned and the virtual aperture size.

7. The computer-implemented method of claim 1 , wherein the optical system includes one or more optical sensors.

8. An optical system comprising:
one or more optical sensors to capture an image of a printed media;
a processing circuitry in electronic communication with the one or more optical sensors, the processing circuitry being configured to:
receive a print job defining specification of the image;
determine characteristic data of the image from the print job;
determine, based on the characteristic data, a virtual aperture size of the optical system;
cause the optical system to scan the image at a resolution based on a physical aperture size of the optical system; and

modify the resolution of the scanned image based on the virtual aperture size of the optical system.

9. The optical system of claim 8 , wherein the image includes an indicia, and wherein the characteristic data includes at least a size of the indicia and a type of the indicia.

10. The optical system of claim 8 wherein the physical aperture size is less than the virtual aperture size.

11. The optical system of claim 8 , wherein, when modifying the resolution of the scanned image, the processing circuitry is configured to blur the scanned image during the optical system scanning the image.

12. The optical system of claim 8 , wherein, when modifying the resolution of the scanned image, the processing circuitry is configured to blur the scanned image after the optical system scanning the image.

13. The optical system of claim 8 , wherein the virtual aperture size is determined based on a reference table that includes a mapping between a resolution at which the image is to be scanned and the virtual aperture size.

14. The optical system of claim 8 , wherein the processing circuitry is configured to combine one or more outputs of the one or more optical sensors to modify the resolution of the scanned image.

15. The optical system of claim 8 , wherein the processing circuitry is configured to modify the resolution by combining a partial output value of the one or more optical sensors.

16. A non-transitory computer-readable medium having computer-readable instructions stored therein, wherein the computer-readable instructions, when executed by a processor, cause the processor to:
determine characteristic data of an image;
determine, based on the characteristic data, a virtual aperture size of an optical system;
cause the optical system to scan the image at a resolution based on a physical aperture size of the optical system; and

modify the resolution of the scanned image based on the virtual aperture size of the optical system.

17. The non-transitory computer-readable medium of claim 16 , wherein the image includes an indicia, and wherein the characteristic data includes at least a size of the indicia and a type of the indicia.

18. The non-transitory computer-readable medium of claim 16 , wherein the physical aperture size is less than the virtual aperture size.

19. The non-transitory computer-readable medium of claim 16 , wherein, when modifying the resolution of the scanned image, the computer-readable instructions cause the processor to blur the scanned image during the optical system scanning the image.

20. The non-transitory computer-readable medium of claim 16 , wherein, when modifying the resolution of the scanned image, the computer-readable instructions cause the processor to blur the scanned image after the optical system scanning the image.

Assignees

• Datamax Oneil Corp

Inventors

• Ackley H Sprague
• Qian Si
• Celinder Thomas Axel Jonas
• D'Armancourt Sebastien

Classifications

• G06K7/10673 Primary

  Parallel lines · CPC title

• G06K5/00 Primary

  Methods or arrangements for verifying the correctness of markings on a record carrier; Column detection devices · CPC title

• G06K7/10851

  Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device (basic electronic circuitry H03) · CPC title

• G06K7/14

  using light without selection of wavelength, e.g. sensing reflected white light {(G06K7/10831 - G06K7/1097 take precedence)} · CPC title

• G06K19/06009

  with optically detectable marking (G06K19/063, G06K19/08 take precedence) · CPC title