On-line Signature Verification Based on Modified Dynamic Time Warping and Wavelet Sub-band Coding

  • Juan Carlos Sánchez-Diaz
  • Juan Manuel Ramírez-Cortes
  • Rogerio Enriquez-Caldera
  • Pilar Gomez-Gil
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6256)


This paper presents an on-line signature biometric system based on a modified Dynamic Time Warping (DTW) algorithm applied to the signature wavelet coefficients. The modification on DTW relies on the use of direct matching points information (DMP) to dynamically adapt the similarity measure during the matching process, which is shown to increase the verification success rate. The wavelet analysis is done using a sub-band coding algorithm at global and local level. The use of wavelet coefficients showed a considerable reduction in processing time and an improvement in the equal error recognition rate (EER). The system was tested using a locally constructed database. A comparison of the ROC curves obtained in each case is presented.


Signature online verification dynamic time warping wavelet 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Juan Carlos Sánchez-Diaz
    • 1
  • Juan Manuel Ramírez-Cortes
    • 1
  • Rogerio Enriquez-Caldera
    • 1
  • Pilar Gomez-Gil
    • 2
  1. 1.Department of ElectronicsNational Institute of Astrophysics, Optics and ElectronicsTonantzintlaMexico
  2. 2.Department of Computer ScienceNational Institute of Astrophysics, Optics and ElectronicsTonantzintlaMexico

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