The typical types of biometric authentication in practice are summarized
below.
Reference
Feature extraction
“Feature extraction” is a method of extracting the features of a fingerprint pattern such as where a ridge terminates
or splits in order to compare fingerprints.
●Fingerprint authentication
Fingerprint authentication is the most prevalent form of biometric authentication and is used in laptop computers and mobile phones due to the
small size and comparatively low price of the authentication devices.
Methods of fingerprint authentication include feature extraction, which involves extracting and matching features from fingertip patterns, and pattern matching, which provides matching by superimposing images of fingerprint patterns.
Feature extraction
Pattern matching
●Vein authentication
Vein authentication is a method for matching vein patterns, utilizing the
property of blood flowing in veins to absorb near-infrared light. Matching
is performed using finger and palm vein patterns. Palm vein authentication
delivers higher accuracy than finger vein authentication, as there are many
thick veins in the palm.
Vein authentication is used in a wide range of fields such as bank ATMs
since there is less psychological resistance to using the technology. Vein
patterns are invisible to the eye and there is not as much of an association
with crime investigation. Contactless sensor devices have been developed
for improved hygiene.
Near-infrared
Sensor device
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