System and Method for Analysis of Test Pattern Image Data in an Inkjet Printer Using a Template
AssigneeXerox Corporation
InventorsMichael W. Elliot, Thomas F. Shane, Charles A. Barbe, Vivek Jaganathan
Life of this patent
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Abstract
Test pattern template data are stored in a memory of a printer to identify locations spatially within image data of a test pattern printed by printheads in an inkjet printer. The test pattern template data identifies an origin of a test pattern in the image data and the distances between structures in the test pattern to enable test pattern structure in the image data to be detected and identified more easily.
Claims16
A method for analyzing image data of a test pattern generated by a printer comprising:
- identifying an origin position in the test pattern image data with reference to an origin identified by test pattern template data stored within a memory of the printer;
- identifying first inkjet positions for printheads that produce the test pattern in the test pattern image data with reference to first inkjet positions for the printheads identified by the test pattern template data stored within the memory of the printer;
- identifying last inkjet positions for printheads that produce the test pattern in the test pattern image data with reference to last inkjet positions for the printheads identified by the test pattern template data stored within the memory of the printer;
- identifying spatial differences between the first inkjet positions in the test pattern image data and the first inkjet positions identified by the test pattern template data stored within the memory of the printer;
- identifying spatial differences between the last inkjet positions in the test pattern image data and the last inkjet positions identified by the test pattern template data stored within the memory of the printer;
- and
- operating an actuator to move at least one printhead used to produce the test pattern in response to the identified spatial difference corresponding to the first inkjet or the last inkjet of the printhead not being within a predetermined range.
A method for analyzing image data of a test pattern generated by a printer comprising:
- identifying an origin position in the test pattern image data that corresponds to an origin identified by test pattern template data stored within a memory of the printer;
- identifying dash positions in the test pattern image data with reference to corresponding dash positions identified by the test pattern template data stored within the memory of the printer;
- identifying spatial differences between the dash positions in the test pattern image data and the dash positions identified by the test pattern template data stored within the memory of the printer;
- and
- operating an actuator to move a printhead used to produce the test pattern in response to the identified spatial differences not being within a predetermined range.
Dependencies are inferred from the claim text.