5. The computer-implemented method of claim 1 wherein the database of image index files comprises a plurality of clusters, each cluster comprising a plurality of image index files representative of digital images.
5. The computer-implemented method of claim 1 wherein the database of image index files comprises a plurality of clusters, each cluster comprising a plurality of image index files representative of digital images. 7. The computer-implemented method of claim 5 wherein one of the plurality of clusters is a trademark cluster.