1. A method of identifying an indexed image, comprising: receiving a first image containing an index indicator; conducting a first comparison of the image with candidate indexed images, the conducting the first comparison comprising constructing a first representation of the first image; conducting a first ranking of the candidate indexed images based on the first comparison; selecting candidate indexed images based on the first ranking; conducting a second comparison of the image with selected candidate indexed images, the conducting the second comparison comprising creating a second representation of the first image; wherein the second representation has a higher resolution than the first representation; conducting a second ranking of the selected candidate indexed images based on the second comparison; and identifying the indexed image based on the second ranking.