Method and system for color film separation preprocess using ele

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G06K 1500

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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: 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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