In biometrics and fingerprint scanning, fraction ridge refers to the ridges found on the skin
of fingers and palms that make contact with a surface under normal touch.
The friction ridges combined make up a fingerprint.
Biometric Consortium Extensive collection of information pertaining to the research, development, testing, evaulation, and application of biometric-based personal identification/verification technology. The Biometric Consortium serves as the U.S. Government's focal point for this technology.
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