Method and apparatus for the production of color images

Details Method and apparatus for the production of color images Method and apparatus for the production of color images

B - Operations, Transporting

41

L

350/5, 178/3.3

B41L 19/00 (2006.01) H04N 1/60 (2006.01)

Patent

CA 1223058

ABSTRACT Apparatus and method for producing qualitatively high-grade color images of originals such as copy masters for multi-color or process printing by exposing chromatic material wherein the originals are scanned point-by-point and line-by-line and the color signals thus obtained are converted into color density values for the chromatic material by means of a correction of color and of gradation. The drive values for a color exposure unit which exposes the chromatic material point-wise and line-wise are generated from the color density values using a linearization process. As a result of signal inversion color positive originals can be recorded as color negatives and vice versa. The exposure process can be matched to every chromatic material independently of the nature of the original to be reproduced and the state of the developing process by means of changing the color density values according to an arbitrarily selectable correction function and by means of signal inversion.

452080

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