Method for preparing polychromatic printing plates

Details Method for preparing polychromatic printing plates Method for preparing polychromatic printing plates

1990-06-29

1992-05-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358299, 358 80, H04N 146

Patent

active

051132494

ABSTRACT:
A method of processing a file of recorded color separation values of color elements for use in preparing polychromatic printing plates in order to reduce or eliminate defects caused by misregistration by printing, includes the steps: (a) defining a plurality of predetermined color types; (b) identifying the color pairs where there is a change in color between adjacent color element; and (c) for each color pair, determining whether or not to make a frame according to first predetermined criteria based on specific combination of color types in the pair, and then according to second predetermined criteria based on the difference in luminance between corresponding color separations in the respective pair. For those color pairs in which a frame is to be generated, the location of the frame is determined according to third predetermined criteria based on specific combinations of color types in the pair, and then according to fourth predetermined criteria based on the sum of the luminances of each color in the color pair.

REFERENCES:
patent: 4464677 (1984-08-01), Kuhn et al.
patent: 4583116 (1986-04-01), Hennig et al.
patent: 4868884 (1989-09-01), Miyazaki et al.
patent: 4931861 (1990-06-01), Taniguchi

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