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


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?


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?


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


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:


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


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 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


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


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


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


Highly accurate but easy

Fast

Needs some developments

Experiments are going on

Will become day to day technology very soon

conclusion


www.google.com

www.Wikipedia.com

http://www.cl.cam.ac.uk

References


http://www.google.com/

http://www.wikipedia.com/

http://www.cl.cam.ac.uk/

Iris scanner technology

Engineering

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