1. Apparatus comprising: a color image processor to process color images including a given color image, the given color image including plural color separations each having a set of color values for respective image pixels, the image pixels corresponding to different spatial locations within the given color image; an edge distinguisher to distinguish some edges of the given image as opposing edges, an edge including a transition in a color separation of the given color image from a non-white color intensity value, at one side of the edge, to a white intensity value, at the other side of the edge, a given edge being an opposing edge when a transition of the given edge goes, for one separation of the given color image, in one direction from a non-white color value to a white value, and goes, for another separation of the given color image, in the same direction from a white value to a color value; and an edge trapping mechanism to replace or modify pixels along or near an edge, the edge trapping mechanism applying at least one edge trapping operation to identified edges not distinguished as opposing edges and applying a different edge trapping operation to distinguished opposing edges.