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I have a fingerprint image stored in IPFS and I want to compare with another fingerprint image, because i need to know if is the same fingerprint ,is there some way, some lib that i can compare this images using solidity language?

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    You wouldn't want to compare actual fingerprints but hashes of said fingerprints which must align. However, I'm not certain how this is done. I think you would need some way of fuzzy hashing and comparing to see if these fingerprints match for a certain percentage.
    – Gabe
    May 14, 2019 at 13:37
  • For comparing strings: ethereum.stackexchange.com/questions/30912/… May 14, 2019 at 18:33

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