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A study of using quality for Radial Basis Function based score-level fusion in multimodal biometrics  

Choi, Hyun-Soek (Graduate School of Electronics Engineering, Kyungpook National University)
Shin, Mi-Young (School of Electrical Engineering and Computer Science, Kyungpook National University)
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Abstract
Multimodal biometrics is a method for personal authentication and verification using more than two types of biometrics data. RBF based score-level fusion uses pattern recognition algorithm for multimodal biometrics, seeking the optimal decision boundary to classify score feature vectors each of which consists of matching scores obtained from several unimodal biometrics system for each sample. In this case, all matching scores are assumed to have the same reliability. However, in recent research it is reported that the quality of input sample affects the result of biometrics. Currently the matching scores having low reliability caused by low quality of samples are not currently considered for pattern recognition modelling in multimodal biometrics. To solve this problem, in this paper, we proposed the RBF based score-level fusion approach which employs quality information of input biometrics data to adjust decision boundary. As a result the proposed method with Qualify information showed better recognition performance than both the unimodal biometrics and the usual RBF based score-level fusion without using quality information.
Keywords
RBF; NIST BSSR1;
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