Modification of intersession variability in on-line signature verifier

Authors:
Yasunori Hongo;Daigo Muramatsu;Takashi Matsumoto
Affiliations:
Department of Electrical Engineering and Bioscience, Waseda University, Tokyo, Japan;Department of Electrical Engineering and Bioscience, Waseda University, Tokyo, Japan;Department of Electrical Engineering and Bioscience, Waseda University, Tokyo, Japan
Venue:
AVBPA'05 Proceedings of the 5th international conference on Audio- and Video-Based Biometric Person Authentication
Year:
2005

Citing 1
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Abstract

For Pen-input on-line signature verification algorithms, the influence of intersession variability is a considerable problem because hand-written signatures change with time, causing performance degradation. In our previous work, we proposed a user-generic model using AdaBoost. However, this model did not allow for the fact that features of signatures change over time. In this paper, we propose a template renewal method to reduce the performance degradation caused by signature changes over time. In our proposed method, the oldest template is replaced with a new one if the new signature data gives rise to an index which exceeds a threshold value. No further learning is necessary. A preliminary experiment was conducted on a subset of the MCYT database.