A color correlogram is a three-dimensional table indexed by color and distance between pixels which expresses how the spatial correlation of color changes with distance in a stored image. The color correlogram may be used to distinguish an image from other images in a database. To create a color correlogram,...http://www.google.fr/patents/US6246790?utm_source=gb-gplus-shareBrevet US6246790 - Image indexing using color correlograms
