On optimal operator for combining left and right sole pressure data in biometrics security

Authors:
Takahiro Takeda;Kei Kuramoto;Syoji Kobashi;Yutaka Hata
Affiliations:
Graduate School of Engineering, University of Hyogo, Hyogo, Japan;Graduate School of Engineering, University of Hyogo, Hyogo and WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan;Graduate School of Engineering, University of Hyogo, Hyogo and WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan;Graduate School of Engineering, University of Hyogo, Hyogo and WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan
Venue:
Advances in Fuzzy Systems
Year:
2013

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Abstract

This paper describes optimal operator for combining left and right sole pressure data in a personal authentication method by dynamic change of sole pressure distribution while walking. The method employs a pair of right and left sole pressure distribution change data. These data are acquired by amat-type load distribution sensor. The system extracts features based on shape of sole and weight shift from each sole pressure distribution. We calculate fuzzy degrees of right and left sole pressures for a registered person. Fuzzy if-then rules for each registered person are statistically determined by learning data set. Next, we combine the fuzzy degrees of right and left sole pressure data. In this process, we consider six combination operators. We examine which operator achieves best accuracy for the personal authentication. In the authentication system, we identify the walking persons as a registered person with the highest fuzzy degree. We verify the walking person as the target person when the combined fuzzy degree of the walking person is higher than a threshold. In our experiment, we employed 90 volunteers, and our method obtained higher authentication performance by mean and weighted sum operators.