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Combining multiple biometric traits with an order-preserving score fusion algorithm

Liang, Y; Ding, X; Liu, C; Xue, J-H; (2016) Combining multiple biometric traits with an order-preserving score fusion algorithm. Neurocomputing , 171 pp. 252-261. 10.1016/j.neucom.2015.06.039. Green open access

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Abstract

Multibiometric systems based on score fusion can effectively combine the discriminative power of multiple biometric traits and overcome the limitations of individual trait, leading to a better performance of biometric authentication. To tackle multiple adverse issues with the established classifier-based or probability-based algorithms, in this paper we propose a novel order-preserving probabilistic score fusion algorithm, Order-Preserving Tree (OPT), by casting the score fusion problem into an optimisation problem with the natural order-preserving constraint. OPT is an algorithm fully non-parametric and widely applicable, not assuming any parametric forms of probabilities or independence among sources, directly estimating the posterior probabilities from maximum likelihood estimation, and exploiting the power of tree-structured ensembles. We demonstrate the effectiveness of our OPT algorithm by comparing it with many widely used score fusion algorithms on two prevalent multibiometric databases.

Type: Article
Title: Combining multiple biometric traits with an order-preserving score fusion algorithm
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.neucom.2015.06.039
Publisher version: http://dx.doi.org/10.1016/j.neucom.2015.06.039
Language: English
Additional information: (C) 2015 Elsevier B.V. This manuscript is made available under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International license (CC BY-NC-ND 4.0). This license allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licenses are available at http://creativecommons.org/ licenses/by/4.0. Access may be initially restricted by the publisher.
Keywords: Score fusion, Multibiometric system, Order-preserving algorithm, Tree-structured ensemble
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Statistical Science
URI: https://discovery.ucl.ac.uk/id/eprint/1475644
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