Iris scanner technology
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Transcript of Iris scanner technology
PRESENTATION ON
IRIS SCANNER
TECHNOLOGY
BY
SHAMS
CONTENT Introduction What the IRIS?Why IRIS?History of IRIS Recognition ApplicationsMethods of IRIS recognition system IRIS pattern - ComparisonAdvantagesDisadvantages ConclusionReferences
IRIS SCANNER TECHNOLOGY
IRIS Recognition is Fast Developing to be a Fool Proof
And Fast Identification Technique. It is a classic
Biometrics Application that is in an Advanced stage of
Research all Over the world.
INTRODUCTION
IRIS SCANNER TECHNOLOGY
The colored ring around the pupil of the eye is called the IRIS
.
The IRIS is a Thin Circular Diaphragm, which lies between
the cornea and the lens of the human eye.
The function of the Iris is to control to the amount of light
entering through the pupil.
The Average Diameter of the Iris is 12 mm ,and the pupil Size
Can Vary from 10% to 80% Of the Iris Diameter.
What is IRIS?
IRIS SCANNER TECHNOLOGY
Unique patterns.
Stable with age.
Living Password, Can not be
forgotten or copied.
Works on blind person.
User needs not to touch
appliances.
Accurate , faster , and supports
large data base.
Why IRIS?
IRIS SCANNER TECHNOLOGY
The concept of Iris Recognition was first
Proposed by Dr. Frank Burch in 1939.
It was first implemented in 1990 when Dr. John
Daugman created the algorithms for it
These algorithms employ methods of pattern
recognition and some mathematical calculations
for iris recognition.
HISTORY OF IRIS RECOGNITION
IRIS SCANNER TECHNOLOGY
Step 1: Capturing the image of the eye using a camera.
Step 2: Differentiating the outline of the iris and the sclera, and the pupil from the iris.
sclera
iris
pupil
Step 3: Encoding the image using demodulation (also removes reflections, intrusion of eye lid lashes, contact lens outline etc.,). Code is 256 bytes.
Technique:
IRIS SCANNER TECHNOLOGY
ATMs
Computer login: The iris as a living password.
National Border Controls
Driving licenses and other personal certificates.
benefits authentication.
birth certificates, tracking missing.
Credit-card authentication.
Anti-terrorism (e.g.:— suspect Screening at airports)
Secure financial transaction (e-commerce, banking).
Internet security, control of access to privileged
information.
APPLICATION
IRIS SCANNER TECHNOLOGY
In identifying one’s iris, there are 2 methods for its recognition and are:
Active
Passive
The active Iris system requires that a user be anywhere from six to
fourteen inches away from the camera.
The passive system allows the user to be anywhere from one to three feet
away from the camera that locates the focus on the iris.
Methods Of IRIS Recognition System
IRIS SCANNER TECHNOLOGY
IRIS Recognition Diagram
Image Acquisition
IRIS Segmentation Normalization
Feature Encoding Feature Matching Identify or
Reject Subject
Iris Templates Database
Eye Image Iris Region
Feature points in the iris region
Iris Template
IRIS SCANNER TECHNOLOGY
Test of Statistical Independence
Compare the iris codes (256*8=2048 bits) of the eyes using the
following formula.
[Code A (XOR) Code B] AND Mask A AND Mask B
H.D = ---------------------------------------------------------------------------------------------------------------------
Mask A AND Mask B
This is called Hamming Distance (H.D).
Iris pattern - Comparison
IRIS SCANNER TECHNOLOGY
Highly protected, internal organ of the eye
Externally visible, patterns imaged from a distance
Iris patterns possess a high degree of randomness
Patterns apparently stable throughout life
Encoding and decision-making are tractable
Advantages
IRIS SCANNER TECHNOLOGY
Small target to acquire from a distance
Moving target…within another…on yet another
Located behind a curved, wet, reflecting surface
Obscured by eyelashes, lenses, reflections
Illumination should not be visible or bright
Disadvantages of the Iris for Identification
IRIS SCANNER TECHNOLOGY
Highly accurate but easy
Fast
Needs some developments
Experiments are going on
Will become day to day technology very soon
conclusion
IRIS SCANNER TECHNOLOGY
www.google.com
www.Wikipedia.com
http://www.cl.cam.ac.uk
References
IRIS SCANNER TECHNOLOGY