biometric

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What are biometrics?

A biometric is a unique, measurable characteristic of a human
being that can be used to automatically recognize an individual or verify an
individual’s identity. Biometrics can measure both physiological and
behavioral characteristics. Physiological biometrics (based on measurements
and data derived from direct measurement of a part of the human body)
include:
 Finger-scan
 Facial Recognition
 Iris-scan
 Retina-scan
 Hand-scan


Why we choose face recognition over other biometric?
There are a number reasons to choose face recognition. This
includes the following
1. It requires no physical inetraction on behalf of the user.
2. It is accurate and allows for high enrolment and verification rates.
3. It does not require an expert to interpret the comparison result.
4. It can use your existing hardware infrastructure, existing camaras and
image capture devices will work with no problems.
5. It is the only biometric that allow you to perform passive identification in a
one to many environment (eg: identifying a terrorist in a busy Airport
terminal.


FACE RECOGNITION THE FACE:
The face is an important part of who you are and how people
identify you. Except in the case of identical twins, the face is arguably a
person's most unique physical characteristics. While humans have the innate
ability to recognize and distinguish different faces for millions of years ,
computers are just now catching up.



CAPTURING OF IMAGE BY STANDARD VIDEO
CAMERAS
The image is optical in characteristics and may be thought of as a
collection of a large number of bright and dark areas representing the picture
details. At an instant there will be large number of picture details existing
simultaneously each representing the level of brightness of the scene to be
reproduced. In other words the picture information is a function of two
variables: time and space. Therefore it would require infinite number of
channels to transmit optical information corresponding to picture elements
simultaneously. There are practical difficulty in transmitting all information
simultaneously so we use a method called scanning.