
3
Overview
Overview of
of Biometrics
Biometrics
Biometrics= BIO + METRICS
Biometrics= BIO + METRICS
Biometrics is part of 
Biometrics is part of Automatic Identification and Data Capture (AIDC)
Automatic Identification and Data Capture (AIDC)
Biometric technologies defined as 
Biometric technologies defined as “
“automated methods of verifying or 
automated methods of verifying or 
recognizing the identity of 
recognizing the identity of a living person
a living person based on a physiological or 
based on a physiological or 
behavioral characteristic
behavioral characteristic”
”
Biometric technologies based on three basic methods:
Biometric technologies based on three basic methods:
a mechanism to scan and capture a digital or 
a mechanism to scan and capture a digital or analog
analog image of a living personal 
image of a living personal 
characteristic
characteristic
compression, processing and comparison of the image to a databas
compression, processing and comparison of the image to a database of stored 
e of stored 
images
images
interface with applications systems
interface with applications systems
Biometric technologies 
Biometric technologies based upon 
based upon physiological
physiological and 
and behavioral
behavioral human 
human 
characteristics
characteristics