Method for determining color boundaries for correcting for plate

Details Method for determining color boundaries for correcting for plate Method for determining color boundaries for correcting for plate

1993-03-31

1994-05-17

Harkcom, Gary V.

Image analysis

Histogram processing

For setting a threshold

395123, 395126, 395133, 382 19, 382 22, 382 25, G06F 1562

Patent

active

053135709

ABSTRACT:
A method for determining the boundaries between regions of color making up polychromatic document pages or images, in order to compensate for misregistration of printing plates in printing, and thereby to prevent light leaks and other errors at the boundaries so determined. A map of the boundaries is generated, to which trapping operations are applied to form a structured graphic object that is included as the last object imaged in the data representing the original image. The geometrical description of the boundary map determined according to the method of the invention is independent of specific trapping decisions applicable to the associated image.

REFERENCES:
patent: 4989079 (1991-01-01), Ito
patent: 5018210 (1991-05-01), Merryman et al.
patent: 5129051 (1992-07-01), Cain
patent: 5181257 (1993-01-01), Steiner et al.

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