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Biometric Template Binarization

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Encyclopedia of Biometrics

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Synonyms

Biometric discretization

Definition

Biometric binarization is the process of converting real-valued biometric features into a binary string. For many modalities (e.g., face, fingerprint, and signature) where the extracted features are intrinsically real valued, biometric binarization is developed for transforming the features into an acceptable form of input to many template protection schemes such as fuzzy commitment, fuzzy extractor, secure sketch, and helper data systems. Due to noisy nature of biometrics, the binary biometric representation extracted during verification may contain errors (bit differences) with reference to the reference template. The number of bit differences must not exceed the system (Hamming distance) decision threshold for obtaining a positive match.

Biometric binarization can be assessed using three criteria – performance, security, and privacy. Performance is referred to as the classification performance of binary representations where a good...

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Author information

Authors and Affiliations

  1. Department of Computer Science Hong Kong Baptist University, Kowloon Tong, Hong Kong

    Meng-Hui Lim

  2. School of Electrical and Electronic Engineering, Yonsei University, Seoul, South Korea

    Andrew B. J. Teoh

Authors
  1. Meng-Hui Lim
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  2. Andrew B. J. Teoh
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Corresponding author

Correspondence to Meng-Hui Lim .

Editor information

Editors and Affiliations

  1. Center for Biometrics and Security, Research & National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing, China

    Stan Z. Li

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

    Anil K. Jain

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© 2015 Springer Science+Business Media New York

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Lim, MH., Teoh, A.B.J. (2015). Biometric Template Binarization. In: Li, S.Z., Jain, A.K. (eds) Encyclopedia of Biometrics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-7488-4_9079

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