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US 9,785,873 B2Granted
Halftone calibration mechanism
AssigneeRicoh Company, Ltd.
InventorsMikel Stanich, Nikita Gurudath, Larry M. Ernst, William E. Manchester
Life of this patent
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Abstract
A printing system is disclosed. The printing system includes a halftone calibration module to receive one or more un-calibrated halftones, transform un-calibrated threshold values in the one or more un-calibrated halftones via an inverse transfer function to generate calibrated halftone threshold values and generate one or more calibrated halftones based on the calibrated halftone threshold values.
Claims20
An article of manufacture comprising a non-transitory machine-readable medium including data that, when accessed by a machine, cause the machine to:
- generate an inverse transfer function for each of a plurality of gray levels based on a target response and a measured response;
- receive one or more un-calibrated halftones;
- transform un-calibrated threshold values in the one or more un-calibrated halftones via the inverse transfer function to generate calibrated halftone threshold values;
- generate one or more calibrated halftones based on the calibrated halftone threshold values;
- process image data using the one or more calibrated halftones;
- and
- transmit the processed image data for printing.
4 more elements
A printing system comprising:
- a controller operable to generate an inverse transfer function for each of a plurality of gray levels based on a target response and a measured response, receive one or more un-calibrated halftones, transform un-calibrated threshold values in the one or more un-calibrated halftones via an inverse transfer function to generate calibrated halftone threshold values, generate one or more calibrated halftones based on the calibrated halftone threshold values, process image data using the one or more calibrated halftones and transmit the processed image data for printing.
Dependencies are inferred from the claim text.