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Isn't tineye's signature algorithm based on Fourier transform? http://www.reddit.com/r/programming/comments/bvmln/how_does_tineye_work/c0os84n http://www.reddi

• icegreentea 15y ago
  As the post notes, that algorithm is great at matching, but sucks at searching. Hashes on the other hand are probably better off at matching. My guess is that you use some variation of hashing to get a set of candidate images, and then do more detailed examinations.