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I am new to openCV .My requirement is to compare an image against a set of images in the database,and find out the best possible match.I have tried using brute force matcher algorithm for the same.But i am getting lot of false matches.Any way we can differentiate between true match and false match and also can we calculate the similarity percentage of the images?I am using python. Any help is appreciated

I am new to openCV .My My requirement is to compare an image against a set of images in the database,and database and find out the best possible match.I match. I have tried using brute force matcher algorithm for the same.But i algorithm, but I am getting lot of false matches.Any matches. Is there a way we can differentiate between true match matches and false match matches and also can we calculate the similarity percentage of the images?I images? I am using python. Any help is appreciatedpython.