Patent ID: 8560244
Filing Date: 2013-10-15
Classification: G06K

Abstract:
1. A computer implemented method, wherein the method is a method of comparing a first representation of an identifier with a second representation of an identifier, the identifier being a biometric identifier or other marking, the identifier being of a type, the type being one of a fingerprint, a palm print, an ear print, a retina image, a footprint, a shoe print or a part of any of those, the first representation and the second representation being of identifiers of the same type, the method including: providing an expression of the first representation by physically collecting the first representation of the identifier and extracting data therefrom to provide the expression; considering the expression of the first representation against a probability distribution based on the variation in the expression between different example representations of the second representations, to provide a first consideration; considering the expression of the first representations against a probability distribution based on the variation in the expression between different population representations, to provide a second consideration; using the first consideration and second consideration to provide a measure of comparison between the first representation and the second representation; wherein the measure of comparison is a likelihood ratio and wherein the measure of comparison is a result which is displayed to a user; and wherein one or both of the distributions was generated by a method comprising: wherein the second distribution is of a different type to the first distribution.