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EURASIP Journal on Advances in Signal Processing

, 2013:183

First Online: 11 December 2013Received: 31 May 2012Accepted: 25 November 2013


This paper proposes an online signature verification method based on the finite impulse response FIR system characterizing time-frequency characteristics of dynamic handwriting features. First, the barycenter determined from both the center point of signature and two adjacent pen-point positions in the signing process, instead of one pen-point position, is used to reduce the fluctuation of handwriting motion. In this paper, among the available dynamic handwriting features, motion pressure and area pressure are employed to investigate handwriting behavior. Thus, the stable dynamic handwriting features can be described by the relation of the time-frequency characteristics of the dynamic handwriting features. In this study, the aforesaid relation can be represented by the FIR system with the wavelet coefficients of the dynamic handwriting features as both input and output of the system. The impulse response of the FIR system is used as the individual feature for a particular signature. In short, the signature can be verified by evaluating the difference between the impulse responses of the FIR systems for a reference signature and the signature to be verified. The signature verification experiments in this paper were conducted using the SUBCORPUS MCYT-100 signature database consisting of 5,000 signatures from 100 signers. The proposed method yielded equal error rate EER of 3.21% on skilled forgeries.

Electronic supplementary materialThe online version of this article doi:10.1186-1687-6180-2013-183 contains supplementary material, which is available to authorized users.

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Autor: Pitak Thumwarin - Jitawat Pernwong - Takenobu Matsuura


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