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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