Pitch to pitch online gray balance calibration with dynamic...

Details Pitch to pitch online gray balance calibration with dynamic... Pitch to pitch online gray balance calibration with dynamic...

2011-06-28

2011-06-28

Haskins, Twyler L (Department: 2625)

Facsimile and static presentation processing

Natural color facsimile

Measuring, testing, and calibrating

C358S001900, C358S003010, C382S167000, C399S049000

Reexamination Certificate

active

07969625

ABSTRACT:
An automatic gray balance control system to produce TRCs for all primary colors in a reproduction device and for each pitch of a photoreceptor system by printing target patches for each pitch, measuring the output colors, and automatically readjusting the tone reproduction curves until a satisfactory level of accuracy is obtained as compared to the theoretical desired output. The system produces pitch-based gray balanced TRCs that are updated frequently for each pitch, with different TRCs for different pitches, to ensure consistency in output from pitch to pitch as well as from page to page on a given pitch.

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