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False rejection rate

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Definitions Edit

A false rejection rate (FRR) is

[t]he probability that a biometric system will fail to identify an applicant, or verify the legitimate claimed identity of an applicant.[1]
[a] statistic used to measure biometric performance when operating in the verification task. [It is t]he percentage of times the system produces a false reject. . . . Example: John claims to be John, but the system incorrectly denies the claim.[2]

Overview Edit

False rejection rate can be expressed arithmetically as FRR = (# of rejections of an authorized user)/(total # of attempts by the user).

References Edit

  1. NIST, FIPS 201.
  2. Biometrics Identity Management Agency, Biometrics Glossary, at 28 (Ver. 5) (Oct. 2010) (full-text).

See also Edit

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