On-line signature verification based on modified dynamic time warping and wavelet sub-band coding

Authors:
Juan Carlos Sánchez-Diaz;Juan Manuel Ramírez-Cortes;Rogerio Enriquez-Caldera;Pilar Gomez-Gil
Affiliations:
Department of Electronics, National Institute of Astrophysics, Optics and Electronics, Puebla, Mexico;Department of Electronics, National Institute of Astrophysics, Optics and Electronics, Puebla, Mexico;Department of Electronics, National Institute of Astrophysics, Optics and Electronics, Puebla, Mexico;Department of Computer Science, National Institute of Astrophysics, Optics and Electronics, Pueblam, Mexico
Venue:
MCPR'10 Proceedings of the 2nd Mexican conference on Pattern recognition: Advances in pattern recognition
Year:
2010

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Abstract

This paper presents an on-line signature biometric system based on a modified Dynamic Time Warping (DTW) algorithm applied to the signature wavelet coefficients. The modification on DTW relies on the use of direct matching points information (DMP) to dynamically adapt the similarity measure during the matching process, which is shown to increase the verification success rate. The wavelet analysis is done using a sub-band coding algorithm at global and local level. The use of wavelet coefficients showed a considerable reduction in processing time and an improvement in the equal error recognition rate (EER). The system was tested using a locally constructed database. A comparison of the ROC curves obtained in each case is presented.