Process for creating five to seven color separations used on a m

Details Process for creating five to seven color separations used on a m Process for creating five to seven color separations used on a m

1995-03-27

1997-11-11

Vu, Kim

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358523, 358534, 358535, 358536, G06F 1500, H04N 152, G03F 308

Patent

active

056873000

ABSTRACT:
In a method for creating at least five to seven color separations for input into a raster image processor for creation of at least five screen separations for use with at least a five color press to create at least a five color printed page, a scanned digitized image is created represented by at least three digitized color image signals. These at least three digitized color image signals are input into a digital color separation computer. The digital color separation computer is used to create at least five single color unscreened image separations in the form of computer files. The computer files are input into a raster image processor to create at least five single color screen separations in the form of electronic signals. The electronic signals are then fed to a film recorder to create at least five single color screen separation films used in conjunction with a five color press to create the at least five color printed page. The digital color separation computer computes four color signals from the three digitized color image signals of the digitized image and then creates a fifth color signal by searching for a maximum saturated color from among three colors derived from the at least three digitized color image signals. Correction factors in the form of tables are created representing various printing environment parameters. These correction factors are applied to the at least five color signals to obtain the at least 5-color separations.

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