mrbaggins wrote:MD5 isn't what you want at all... one bit of difference will completely change the entire result.
I'm really not sure if what you want exists. It's tricky to do reliably, and you have to go on confidence levels because two things might be similar but not the same, or the same picture but different enough that the program gets confused...
EvanED wrote:be aware that when most people say "regular expression" they really mean "something that is almost, but not quite, entirely unlike a regular expression"
MHD wrote:I'd probably go with the resizing too, or maybe construct a hashing algo that would not differ much from picture to picture (IE. little avalanche effect) and then compare the output as integers.
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