Method of and apparatus for producing color proof

Details Method of and apparatus for producing color proof Method of and apparatus for producing color proof

1995-12-28

1998-03-31

Bost, Dwayne

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358518, 358504, 358534, 358535, G06K 1500, H04N 146

Patent

active

057348014

ABSTRACT:
Halftone-dot area percentage data generated from an image document for at least three plates including three primaries are converted into respective bit map data with referring to respective threshold matrix. The bit map data are simultaneously referred to with respect to each of the pixels of a color printer which is to output a color proof, and thereby the area percentages are counted. Then, predetermined colorimetric data of the respective colors are processed by the area percentages as weighting coefficients, and the average tristimulus value data are calculated. The calculated tristimulus value data are used as pixel data of input image data of the color printer.

REFERENCES:
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patent: 4847638 (1989-07-01), Moriyama
patent: 5276459 (1994-01-01), Danzuka et al.
patent: 5475509 (1995-12-01), Okamoto
patent: 5504506 (1996-04-01), Noaki
patent: 5508826 (1996-04-01), Lloyd et al.
patent: 5530563 (1996-06-01), Zimmerman et al.
patent: 5596353 (1997-01-01), Takeda et al.

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