| 摘要 |
Methods and apparatus implementing a technique for forming a trap polygon which does not interfere with the print quality of other trap polygons or objects. Edges in close proximity to a color transition edge ("CTE") are checked for potential interference. A trap polygon is formed for the CTE that avoids any interfering edges or trap polygons for those edges. The technique can be applied to form a trap polygon for each edge in a page to be printed. In general, in one aspect, forming a trap polygon for trapping a color transition edge, where the trap polygon has an associated trap color determined by colors defining the color transition edge, includes: identifying one or more potentially interfering edges which intersect a keep away zone defined by the color transition edge; screening the potentially interfering edges to identify interfering edges which are part of an object which is of a significantly different color than the trap color; and forming a trap polygon for trapping the color transition edge including shaping the trap polygon to avoid overlapping objects and any trap polygons corresponding to any interfering edges.
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