Method and system for color film separation preprocess using electronic object-based choking and spreading procedures including object combining operations
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United States of America Patent
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Mar 28, 1995
Grant Date -
N/A
app pub date -
Aug 20, 1991
filing date -
Aug 20, 1991
priority date (Note) -
Expired
status (Latency Note)
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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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Cited Art Landscape
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