Method for producing color and black plates in a multi-color pla

Details Method for producing color and black plates in a multi-color pla Method for producing color and black plates in a multi-color pla

1991-05-23

1992-07-28

Fuller, Benjamin R.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 80, H04N 123, H04N 146

Patent

active

051344947

ABSTRACT:
Light intensity values as picture information of a color original are obtained by using photographic density characteristic curves of the color-film original, instead of conventional density values. Thus obtained light intensity values are processed by conducting a specific tonal conversion formula (1) to obtain color-separation curves for color (C, M and Y) plates. On the basis of the color-separation curves for the color plates, a range to be entered black is determined, and a color-separation curve for a black (B) plate is set by conducting the same tonal conversion formula (1).

REFERENCES:
patent: 4811108 (1989-03-01), Numakura
patent: 4833546 (1989-05-01), Numakura
patent: 4924323 (1990-05-01), Numakura
patent: 4956718 (1990-09-01), Numakura
patent: 5057931 (1991-10-01), Numakura

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