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A Hybrid Statistical Modelling, Normalization and Inferencing Techniques of an Off-Line Signature Verification System

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5 Author(s)
Ahmad, S.M.S. ; Coll. of Inf. Technol., Univ. Tenaga Nasional (UNITEN), Kajang, Malaysia ; Shakil, A. ; Faudzi, M.A. ; Anwar, R.M.
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This paper presents an automatic off-line signature verification system that is built using several statistical techniques. The learning phase involves the use of Hidden Markov Modelling (HMM) technique to build a reference model for each local feature extracted from a set of signature samples of a particular user. The verification phase uses three layers of statistical techniques. The first layer involves the computation of the HMM-based log-likelihood probability match score. The second layer performs the mapping of this score into soft boundary ranges of acceptance or rejection through the use of z-score analysis and normalization function. Next Bayesian inference technique is used to arrive at the final decision of accepting or rejecting a given signature sample.

Published in:

Computer Science and Information Engineering, 2009 WRI World Congress on  (Volume:6 )

Date of Conference:

March 31 2009-April 2 2009

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