Gait Verification Using Probabilistic Methods

Bazin, Alex I. and Nixon, Mark S. (2005) Gait Verification Using Probabilistic Methods. At 7th IEEE Workshop on Applications of Computer Vision, Breckenridge, CO, IEEE Computer Society, 50-55.


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In this paper we describe a novel method for gait based identity verification based on Bayesian classification. The verification task is reduced to a two class problem (Client or Impostor) with logistic functions constructed to provide probability estimates of intra-class (Client) and inter-class (Impostor) likelihoods. These likelihoods are combined using Bayes rule and thresholded to provide a decision boundary. Since the outputs of the classifier are probabilities they are particularly well suited for use without modification in classifier fusion schemes. On tests using 1664 examples from 100 clients and 100 impostors the Bayesian method achieved an equal error rate of 7.3%. The improvement over a Euclidean distance classifier was shown to be statistically significant at the 5% level using McNemar’s test.

Item Type: Conference or Workshop Item (Poster)
Additional Information: Event Dates: 08/01/2005
Keywords: Gait, Logistic Function, Bayesian
Divisions : Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Southampton Wireless Group
ePrint ID: 260271
Accepted Date and Publication Date:
Date Deposited: 14 Jan 2005
Last Modified: 31 Mar 2016 14:02
Further Information:Google Scholar

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