Similarity Metrics Analysis for Feature Point Based Retinal Authentication

  • M. Ortega
  • M. G. Penedo
  • C. Mariño
  • M. J. Carreira
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5112)


Biometrics refer to identity verification of individuals based on some physiologic or behavioural characteristics (face, fingerprint, signature...). The typical authentication process of a person consists in extracting a biometric pattern of him/her and matching it with the stored pattern for the authorized user obtaining a similarity value between patterns. If that similarity is bigger than some threshold the authentication is accepted, otherwise is rejected. Thus, the similarity metrics determine the system ability to successfully classify authentications as authorized or unauthorized. In this work, an analysis of similarity metrics performance is presented for a biometric system in which retinal vessel feature points are used as biometric pattern. The results of the system allow to establish a confidence band for the metric threshold where no errors are obtained for training and test sets.


Authentication System Similarity Measure Retinal Images Biometric Pattern Feature point matching 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • M. Ortega
    • 1
  • M. G. Penedo
    • 1
  • C. Mariño
    • 1
  • M. J. Carreira
    • 2
  1. 1.VARPA Group, Department of Computer ScienceUniversity of A Coruña(Spain)
  2. 2.Department of Electronics and Computer ScienceUniversity of Santiago de Compostela(Spain)

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