A planar map to process a raster image is disclosed. In one embodiment, a method of tracing a raster image includes generating a planar map having at least one region and applying the planar map to the raster image to create a traced image. The method may include reducing the number of colors of the...http://www.google.co.uk/patents/US7929755?utm_source=gb-gplus-sharePatent US7929755 - Planar map to process a raster image
