Iris
localisation
Image acquisition of iris can be expected to yield an image
containing only the iris. Rather image acquisition will capture the iris as
part of a larger image that also contains data derived from the surrounding eye
region. Prior to performing iris pattern matching it is important to localize
that portion of the image that corresponds to iris. Iris localization is a
process that delimits the iris from the rest of the acquired image.
Introduction
In today’s information age it is not difficult to collect data
about an individual and use that information to exercise control over the
individual. Individuals generally do not want others to have personal
information about them unless they decide to reveal it. With the rapid
development of technology, it is more difficult to maintain the levels of
privacy citizens knew in the past. In this context, data security has become an
inevitable feature. Conventional methods of identification based on possession
of ID cards or exclusive knowledge like social security number or a password
are not altogether reliable. ID cards can be almost lost, forged or misplaced:
passwords can be forgotten. Such that an unauthorized user may be able to break
into an account with little effort.
Image acquisition
The iris recognition process begins with video-based image
acquisition a process which deals with the capturing of a high quality image of
the iris while remaining non-invasive to the human operator. There are 3
important requisites for this process
Commensurability of iris codes
A critical feature of this coding approach is the achievement
of commensurability among iris codes, by mapping all irises into a
representation having universal format and constant length, regardless of the
apparent amount of iris detail. In the absence of commensurability among the
codes, one would be faced with the inevitable problem of comparing long codes
with short codes, showing partial agreement and partial disagreement in their
lists of features.
Iris Recognition
Iris identification technology is a tremendously accurate
biometric. Iris recognition leverages the unique features of the human iris to
provide an unmatched identification technology. So accurate are the algorithms
used in iris recognition that the entire planet could be enrolled in an iris
database with only a small chance of false acceptance or false rejection.
Accuracy
The Iris Code constructed from these Complex measurements
provides such a tremendous wealth of data that iris recognition offers level of
accuracy orders of magnitude higher than biometrics.
Iris As A Powerful Identifer
Iris is the focus of a relatively new means of biometric
identification. The iris is called the living password because of its unique,
random features. It is always with you
and can not be stolen or faked. The iris of each eye is absolutely unique. In
U.S many banks incorporated iris recognition technology into ATM’s for the
purpose of controlling access to one’s bank accounts.
Conclusion
The technical performance capability of the iris recognition
process far surpasses that of any biometric technology now available. Iridian
process is defined for rapid exhaustive search for very large databases:
distinctive capability required for authentication today. The extremely low
probabilities of getting a false match enable the iris recognition algorithms
to search through extremely large databases, even of a national or planetary
scale.
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