Skip to main content

Iris Scanning Technique

Iris Scanning Technique


                         The iris is a colored ring that surrounds the pupil and contains easily visible yet complex and distinct combinations of corona, pits, filaments, crypts, striations, radial furrows, and more. The iris is called the Living Password because of its unique, random features. It's always with you and can't be stolen or faked. As such, it makes an excellent biometric identifier.
    The world is crying out for simpler access controls to personal authentication systems and it looks like biometrics may be the answer. Instead of that big ring of keys, all those access cards or passwords you carry around with you, your body can be used to uniquely identify you. Furthermore, when biometrics measures are applied in combination with other controls, such as access cards or passwords, the reliability of authentication controls takes a giant step forward. 

Choosing a Biometric Authentication Solution:

                                                  Biometrics is best defined as measurable physiological and / or behavioral characteristics that can be utilized to verify the identity of an individual.
They include the following:

Ø  Iris Scanning                                              
Ø  Facial Recognition
Ø  Fingerprint Verification
Ø  Hand Geometry
Ø  Retinal Scanning
Ø  Signature Verification
Ø  Voice Verification

                        Initially, these techniques were employed primarily in specialist high security applications; however we are now seeing their use and proposed use in a much broader range of public facing situations. Used properly, biometrics can offer effective ways to safeguard properties and people, data, and information, in an unobtrusive manner.

Advantages of the Iris for Identification:

ü  Highly protected, internal organ of the eye.
ü  Iris patterns possess a high degree of randomness.
ü  Variability: 244 degrees-of-freedom.
ü  Entropy: 3.2 bits per square-millimeter.
ü  Uniqueness: set by combinatorial complexity.
ü  Patterns apparently stable throughout life.
ü  The odds of two different irises returning identical scans: 1 in 1078.

Scanning mechanism:
                        In Iris scanning, the eye is illuminated by light-emitting diodes that surround the camera.  The diodes emit in the visible light spectrum.  The scanner is NOT a laser-retinal scanner so there are no laser eye hazards.  Iris identification uses standard video cameras — the same kind you would use to videotape your family — to take a picture of the iris of your eye.  Since it does not use lasers, it has none of the inherent risks associated with lasers. The LEDs used nullify the effects of the environment.
                        The iris-scanning procedure, as used on humans, is simple and painless. A person must stand approximately 12-14 inches from a camera and looks into the scanning device. The camera scans the iris. The scanned pattern is then compared to previously recorded patterns. Identification is achieved in two          seconds and verification in three.


Popular posts from this blog

12V to 220V Inverter

Even though today’s electrical appliances are increasingly often self-powered, especially the portable ones you carry around when camping or holidaying in summer, you do still sometimes need a source of 230 V AC - and while we’re about it, why not at a frequency close to that of the mains? As long as the power required from such a source remains relatively low - here we’ve chosen 30 VA - it’s very easy to build an inverter with simple, cheap components that many electronics hobbyists may even already have.

Though it is possible to build a more powerful circuit, the complexity caused by the very heavy currents to be handled on the low-voltage side leads to circuits that would be out of place in this summer issue. Let’s not forget, for example, that just to get a meager 1 amp at 230 VAC, the battery primary side would have to handle more than 20 ADC!. The circuit diagram of our project is easy to follow. A classic 555 timer chip, identified as IC1, is configured as an astable multivibra…

Measurement and Instrumentation Principles by Alan S. Morris 3rd Edition

'Measurement and Instrumentation Principles' is the latest edition of a successful book that introduces undergraduate students to the measurement principles and the range of sensors and instruments that are used for measuring physical variables. Completely updated to include new technologies such as smart sensors, displays and interfaces, the 3rd edition also contains plenty of worked examples and self-assessment questions (and solutions). In addition, a new chapter on safety issues focuses on the legal framework, electrical safety and failsafe designs, and the author has also concentrated on RF and optical wireless communications. Fully up-to-date and comprehensively written, this textbook is essential for all engineering undergraduates, especially those in the first two years of their course.
Completely updated Includes new technologies such as smart sensors and displays

Password:- gcuelect

PCB Designing Using Eagle Layout Editor and Photoshop

Make your own PCBs form A to Z 
using Eagle Layout Editor + Photoshop
author: Hlias Hliadis
Making your own PCBs is a procedure that needs extreme care so the result become usefull. Many times you faced up the challenge to print out your own PCBs many times or many different PCBs in one sheet. In this article we will discuss how you can do this compining common software tools. Also we will discuss how to print out PCBs from Elektor magazine along with your own custom made PCB in one transparency, after processing it using Photoshop CS for better results. The software tools you need are: Adobe Photoshop CS (image processing).Adobe Acrobat Reader (PDF files reader).Eagle Layout Editor 4.11 Freeware (PCB design).PCBPDF files from Elektor magazine (available at their website)see (page 3/3) for resources. Designing For the beginning we will design a simple circuit to Eagle which will flash two LED diodes. Open Eagle, under Projects right click and then left click to New Project.
Give a name to the…