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The matching scores in biometric systems are usually calculated using one enrolled (gallery) template and one test (probe, user) template. In this paper we investigate the dependencies existing between scores related to the same enrolled biometric template or to the same user biometric template. We discuss linear score dependency models which are handled by the Z- or T-normalization, and sample statistics...
The combination of biometric matching scores can be enhanced by taking into account the matching scores related to all enrolled persons in addition to traditional combinations utilizing only matching scores related to a single person. Identification models take into account the dependence between matching scores assigned to different persons and can be used for such enhancement. In this paper we compare...
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