ON THE EFFECT OF SCORE EQUALIZATION IN SVM MULTIMODAL BIOMETRIC SYSTEMS

Pascual Ejarque, Javier Hernando

2007

Abstract

Most Support Vector Machine (SVM) based systems make use of conventional methods for the normalization of the features or the scores previously to the fusion stage. In this work, in addition to the conventional methods, two equalization methods, histogram equalization, which was recently introduced in multimodal systems, and Bi-Gaussian equalization, which is presented in this paper, are applied upon the scores in a multimodal person verification system composed by prosodic, speech spectrum, and face information. The equalization techniques have obtained the best results; concretely, Bi-Gaussian equalization outperforms in more than a 22.19 % the results obtained by Min-Max normalization, the most used normalization technique in SVM fusion systems. The prosodic and speech spectrum scores have been provided by speech experts using records of the Switchboard I database and the face scores have been obtained by a face recognition system upon XM2VTS database.

Paper Citation

in Harvard Style

Ejarque P. and Hernando J. (2007). ON THE EFFECT OF SCORE EQUALIZATION IN SVM MULTIMODAL BIOMETRIC SYSTEMS . In Proceedings of the Second International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2007) ISBN 978-989-8111-12-8, pages 33-38. DOI: 10.5220/0002130000330038

in Bibtex Style

@conference{secrypt07,
author={Pascual Ejarque and Javier Hernando},
title={ON THE EFFECT OF SCORE EQUALIZATION IN SVM MULTIMODAL BIOMETRIC SYSTEMS},
booktitle={Proceedings of the Second International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2007)},
year={2007},
pages={33-38},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002130000330038},
isbn={978-989-8111-12-8},
}

in EndNote Style

TY - CONF
JO - Proceedings of the Second International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2007)
TI - ON THE EFFECT OF SCORE EQUALIZATION IN SVM MULTIMODAL BIOMETRIC SYSTEMS
SN - 978-989-8111-12-8
AU - Ejarque P.
AU - Hernando J.
PY - 2007
SP - 33
EP - 38
DO - 10.5220/0002130000330038