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Encyclopedia of Biometrics pp 1185–1192Cite as

Signature Features

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Synonyms

Signature characteristics

Definition

Signature features represent magnitudes that are extracted from digitized signature samples, with the aim of describing each signature as a vector of values. The extraction and selection of optimum signature features is a crucial step when designing a verification system. Features must allow each signature to be described in a way that the discriminative power between signatures produced by different users is maximized while allowing variability among signatures from the same user.

On-line signature features can be divided into two main types. Global features model the signature as a holistic multidimensional vector and represent magnitudes such as average speed, total duration, and aspect ratio. On the other hand, local features are time-functions derived from the signals, such as the pen-position coordinate sequence or pressure signals, captured with digitizer tablets or touch-screens.

In off-line signature verification systems, features...

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Signature Features. Figure 1
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References

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Author information

Authors and Affiliations

  1. Biometric Recognition Group - ATVS, Escuela Politecnica Superior, Universidad Autonoma de Madrid, Campus de Cantoblanco, Madrid, Spain

    Marcos Martinez-Diaz & Julian Fierrez

  2. Department of Electrical Engineering, Tokyo University of Science,  , Japan

    Seiichiro Hangai

Authors
  1. Marcos Martinez-Diaz
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  2. Julian Fierrez
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  3. Seiichiro Hangai
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Editor information

Editors and Affiliations

  1. Center for Biometrics and Security Research, Chinese Academy of Sciences, Beijing, China

    Stan Z. Li (Professor) (Professor)

  2. Departments of Computer Science & Engineering, Michigan State University, East Lansing, MI, USA

    Anil Jain (Professor) (Professor)

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Martinez-Diaz, M., Fierrez, J., Hangai, S. (2009). Signature Features. In: Li, S.Z., Jain, A. (eds) Encyclopedia of Biometrics. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-73003-5_139

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