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US 12,388,937 B2Granted
Methods, apparatuses, and systems for detecting printing defects and contaminated components of a printer
AssigneeHand Held Products, Inc.
InventorsSebastien D'Armancourt, Thomas Axel Jonas Celinder, H Sprague Ackley, Glenn David Aspenns
Life of this patent
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Abstract
A method for printing defect detection includes processing and analyzing a difference image obtained by comparing an image scanned with a verifier to a reference image. The detected defects are grouped, and the grouping is refined. Confidence level values are then assigned to the refined groups, and analysis is performed to determine if one or more servicing actions should be taken.
Claims20
A method comprising:
- capturing an image of printed content;
- generating a difference image based on a comparison of the captured image of the printed content and a reference image, wherein the reference image correlates to the printed content;
- and
- generating a plurality of rendered images based on applying a plurality of defect detection algorithms to the difference image, wherein each of the plurality of rendered images comprises one or more bright pixels that are assigned to at least one defect group from a plurality of defect groups.
1 more element
A printing system comprising:
- a printer;
- and
- a verifier communicatively coupled to the printer and comprising:
- a processing unit;
- a memory storing computer program code, the memory and the computer program code configured to, with the processing unit, cause the verifier to at least:
- identify one or more groups of difference pixels;
- refine the one or more identified groups of difference pixels into one or more defect types;
- determine a confidence level for at least one of the one or more defect types;
- and
- determine one or more defects based on the determined confidence level for at least one of the one or more defect types.
7 more elements
Dependencies are inferred from the claim text.