Methods and systems to merge and/or remove, for example, edges, regions, vertices, in a planar map of a raster image are disclosed. In one embodiment, a method includes identifying color similarities between each of a plurality of regions of an image and merging neighboring regions based on the color...http://www.google.co.uk/patents/US8194974?utm_source=gb-gplus-sharePatent US8194974 - Merge and removal in a planar map of an image
