Method and system for color film separation preprocess using ele

Details Method and system for color film separation preprocess using ele Method and system for color film separation preprocess using ele

1991-08-20

1995-03-28

Nguyen, Phu K.

G06K 1500

Patent

active

054025303

ABSTRACT:
A computer system for production of ink separations from an object-based print pre-process apparatus using a page description language. The print pre-process system facilitates creation of object spreads for any combination or configuration of objects on the rendered page. For each object on a rendered page, the computer system makes use of a spread table to determine spread incidences. For each spread incidence, the computer system generates set union, intersection and difference for spreading, receiving, and obstructing objects by use of a modified Weiler algorithm. The modified Weiler algorithm creates a simplified graph of contour histories providing a visible portion of the spread object, The visible object is strokable within a clipped window set to the receiving object. The stroke color and width, set by the spread table, can be knockout print or overprint.

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patent: 4809065 (1989-02-01), Harris et al.
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patent: 5159669 (1992-10-01), Trigg et al.
patent: 5268992 (1993-12-01), Sasaki
Weiler, K., "Polygon Comparison Using a Graph Representation," ACM Siggraph Annual Conference Proceedings, publ. by Association for Computing Machinery (ACM), pp. 10-18, (1980).
Roth, S., "SettingTRAPS: Finding solutions to printing unexpected white gaps between abutting colors," MACWORLD, pp. 159-161, (May 1991).

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