Method of nonlinear calibration of halftone screen

Details Method of nonlinear calibration of halftone screen Method of nonlinear calibration of halftone screen

2005-08-09

2005-08-09

Nghiem, Michael (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Performance or efficiency evaluation

Reexamination Certificate

active

06928390

ABSTRACT:
Calibration could be implemented in several stages during the color rendering processes. One possible and efficient place to put the calibration to work is in the screen table itself. In order to make the screen intelligent enough to adjust the factor results from output device characteristics, such as the dot gain, toner characteristics, etc., the method is introduced to create a gamma function with normalized gradation curve. Some color balance adjustment features (contrast, brightness, saturation and color strength) also have been taken into consideration.

REFERENCES:
patent: 5841897 (1998-11-01), Numakura et al.
patent: 5953498 (1999-09-01), Samworth

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