Abstract: Influenced by data noise and limitation of recognition system itself, the accuracy of identification system based on single biometric trait is proved to be quite limited. Therefore, the research of using multi biometric recognition for improving recognition accuracy has become one of the hotspots in biometric recognition field. This paper first introduced the importance of multi-biometrics, the classification of multi biometrics, and then mainly discussed the current study on score-based multi-biometric recognition. At the end, this paper concluded the problems and the future work in multi-biometrics.

Key words: Biometric recognition,Multi-biometrics,Multi-modal,Fusion