APPLYING TRAPS TO A PRINTED PAGE SPECIFIED IN A PAGE DESCRIPTION LANGUAGE FORMAT

摘要

Disclosed is a trapping technique that accepts a Postscript or other page description language (PDL) file (300) and outputs a file (400) in PDL format having the correct traps. The input page (300) is first divided into subportions, or tiles (312), and the tiles (312) are individually processed by evaluating the input file (300) in a corresponding clipping window. Each tile (312) in then analyzed to determine the presence of boundaries or intersections between page objects or color regions. A trapping analyzer (214) generates trap vectors (710) in accordance with a set of desired trapping rules (160) which take into account existing traps (734) and the proximity of other page objects. In the preferred embodiment, the trap vectors (810) are then converted to PDL form.