An off-line signature verification system using an extracted displacement function

  • Authors:
  • Yoshiki Mizukami;Mitsu Yoshimura;Hidetoshi Miike;Isao Yoshimura

  • Affiliations:
  • Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai, 755-8611 Ube, Japan;Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai, 755-8611 Ube, Japan;Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai, 755-8611 Ube, Japan;Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwadai, 755-8611 Ube, Japan

  • Venue:
  • Pattern Recognition Letters
  • Year:
  • 2002

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Abstract

This paper proposes an off-line signature verification system based on a displacement extraction method. The optimum displacement functions are extracted for any pair of signatures using minimization of a functional. The functional is defined as the sum of the squared Euclidean distance between two signatures and a penalty term requiring smoothness of the displacement function. A coarse-to-fine search method is applied to prevent the calculation from stopping at local minima. Based on the obtained displacement function, the dissimilarity between a questionable signature and the corresponding authentic one is measured. The proposed system achieved error rate of 24.9% in a experiment.