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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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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DOI: https://doi.org/10.1007/978-1-4899-7488-4_9079
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