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I don't understand why compressing an image is going to generate the same 8x8 image each time no matter what aspect ratio it was originally... whether it has been stretched before.. If you stretch and then recompress a bunch of times don't you eventually lose the information?

That math is for some reason totally counter-intuitive to me. Could someone do a proof?

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From my understanding, its not a md5 hash or equivalent. Its just encoding the 64 bits to a "hash" thus allowing a fuzzy comparison between hashes. Someone correct me if I am wrong.

Obviously, this isn't robust enough to find all matches. A simple cropping would throw it completely off.

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