Correlated secondary TRC calibration method

Details Correlated secondary TRC calibration method Correlated secondary TRC calibration method

2007-09-25

2007-09-25

Poon, King Y. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003060, C358S001900

Reexamination Certificate

active

09569637

ABSTRACT:
This invention is a method of producing a set of TRC's for a color printer's secondary halftone screens that is correlated with the printer's primary halftone screens. The method makes use of the printer/screen characteristic data that is normally gathered during screen calibration. However, instead of progressing from the data to a normal calibration for the secondary screens, the method goes backward through the data starting with the finished primary screen TRC's. The method insures that for every primary screen density, the closest possible secondary screen density is used when the same digital value is specified.

REFERENCES:
patent: 5589954 (1996-12-01), Watanabe
patent: 6078697 (2000-06-01), Ng

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