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ABSTRACT

Iris technology is an emerging research area, providing positive identification of an individual without contact or invasion, at extremely high confidence levels. Iris scan has been developing an identification/verification system capable of positively identifying and verifying the identity of individuals without physical contact or human intervention. It is a new technology, using the unique patterns of the human iris, shows promise of overcoming previous shortcomings .

The video-based system locates the eye and iris; evaluates the degree of occlusion by eyelid and spectral reflection; determines the quality of image focus; and determines the center and boundary of the pupil and the limbus (outer edge of the iris) for processing. The iris is zoned, and the features therein measured and encoded into a 512-byte Iris Code for enrollment or identification. The presented biometric is compared to an extensive database for identification, or to a referenced Iris Code for verification. Computations and decisions are accomplished at extremely high rates of speed, resulting in processing times of less than two seconds. The process is based on the unique nature and extreme richness of the human iris.The multiple features produce a non-duplicable organ with more than 400 degrees of freedom, or measurable variables. The Iris scan process typically uses about 200 of these to create a code which can be compared to an entire database in milliseconds, producing a positive identification with “imposter odds” as high as 1 in 1034.

Iris Recognition Process:

The process of capturing an iris into a biometric template is made up of 3 steps:

1. Capturing the image
2. Defining the location of the iris and optimizing the image
3. Storing and comparing the image.

The physiological properties of irises are major advantages to using them as a method of authentication. As discussed earlier, the morphogenesis of the iris that occurs during the seventh month of gestation results in the uniqueness of the iris even between multi-birth children. These patterns remain stable throughout life and are protected by the body’s own mechanisms

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