Spectrum Analysis Based onWindows with Variable Widths for Online Signature Verification

Authors:
Zhong-hua Quan;De-shuang Huang;Xiao-lei Xia;Michael R. Lyu;Tat-Ming Lok
Affiliations:
University of Science and Technology of China.;Hefei Institute of Intelligent Machines, CAS.;Hefei Institute of Intelligent Machines, CAS.;Chinese University of Hong Kong;Chinese University of Hong Kong
Venue:
ICPR '06 Proceedings of the 18th International Conference on Pattern Recognition - Volume 02
Year:
2006

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Abstract

In this paper, an online signature verification scheme based on spectrum analysis and Mahalanobis decision is proposed. We firstly divided signatures to a number of frames with variable widths according to the characteristics of the time sequences, and then employed the Fast Fourier transformation(FFT) to extract the spectrum of signatures. The distance between the Fourier coefficient within the corresponding frames is computed, and the Mahalanobis decision making is employed. Experimentation demonstrates that spectrum analysis based on windows with variable widths is effective for online signature signals.