The lack of
robustness against image quality degradation is a open issue in fingerprint
verification. It has been found in previous studies that the behavior of a
fingerprint verification system may vary depending on the quality of the
fingerprints. In this paper, we study the performance for individual users
under varying image conditions using a multisensor database acquired with three
different fingerprint sensors. We propose a user-dependent score normalization
scheme that exploits quality information, reaching an EER improvement of 15%
in one particular sensor. We have also included the proposed score
normalization scheme in a multisensor fingerprint verification system that
combines the three sensors, obtaining an EER improvement of 13% in the best
case.