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15179 Threshold-optimized decision-level fusion and its application to biometrics
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Tao, Q. and Veldhuis, R.N.J. (2009) Threshold-optimized decision-level fusion and its application to biometrics. Pattern Recognition, 42 (5). pp. 823-836. ISSN 0031-3203 *** ISI Impact 2,554 ***

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Official URL: http://dx.doi.org/10.1016/j.patcog.2008.09.036

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Abstract

Fusion is a popular practice to increase the reliability of biometric verification. In this paper, we propose an optimal fusion scheme at decision level by the AND or OR rule, based on optimizing matching score thresholds. The proposed fusion scheme will always give an improvement in the Neyman–Pearson sense over the component classifiers that are fused. The theory of the threshold-optimized decision-level fusion is presented, and the applications are discussed. Fusion experiments are done on the FRGC database which contains 2D texture data and 3D shape data. The proposed decision fusion improves the system performance, in a way comparable to or better than the conventional score-level fusion. It is noteworthy that in practice, the threshold-optimized decision-level fusion by the OR rule is especially useful in presence of outliers.

Item Type:Article
Research Group:EWI-SAS: Signals and Systems
Research Program:CTIT-ISTRICE: Integrated Security and Privacy in a Networked World
Research Project:Freeband/PNP2008: Development of a user centric ambient communication environment, 3D Face
Uncontrolled Keywords:Fusion; Matching score level; Decision level; Threshold-optimized decision-level fusion
ID Code:15179
Status:Published
Deposited On:11 March 2009
Refereed:Yes
International:Yes
ISI Impact Factor:2,554
More Information:statisticsmetis

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