Biometric authentication measures the unique, invariable biological characteristics of an individual. One of the most common biometrics used today is fingerprint information.
The biometric information is captured during enrollment and translated into a template, which is stored for subsequent authentication. The template is then stored in the database or on the server. During authentication, the biometric information is captured and compared against the stored template. If the user is valid, the two templates will match, and authentication is achieved.
Biometric image capture normally uses a pattern recognition algorithm as the basis for its fingerprint authentication systems. This algorithm processes the entire fingerprint image, rather than simply selecting a limited number of minutiae points. This means that pattern recognition algorithms are more robust as they are not significantly affected by the loss of information when a finger is scarred, damaged, or dirty.