User Identification / Verification
User identification is the process of comparing a user’s fingerprint against a fingerprint template stored in the terminal. When a user’s fingerprint matches a fingerprint template stored in the TQ600 the terminal will show a successful match, thus verifying the user’s identity.
Threshold
The threshold is a predefined number (set by the terminal system administrator) which establishes the degree of correlation necessary for a fingerprint comparison to be deemed a match. It can be thought of as the minimum accuracy required to confirm a fingerprint match. Some biometric systems call this the “sensitivity” level. If the score resulting from a fingerprint read compared to a fingerprint template stored in the terminal exceeds the threshold the templates are approved as a “match” (though the templates themselves are not identical).
The threshold establishes a balance between False Acceptance Rate (FAR) and False Rejection Rate (FRR). FAR means the probability that a biometric system will incorrectly identify an individual or will fail to reject an impostor. FRR means the probability that a biometric system will fail to identify an enrolled individual.
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