16:59
Oneiric Ocelot UTM
The iris of the eye has been described as the ideal part of the human body for biometric identification for several reasons:
• It is an internal organ that is well protected against damage and wear by a highly transparent and sensitive membrane (the cornea). This distinguishes it from fingerprints, which can be difficult to recognize after years of certain types of manual labor.
• The iris is mostly flat, and its geometric configuration is only controlled by two complementary muscles (the sphincter pupillae and dilator pupillae) that control the diameter of the pupil.This makes the iris shape far more predictable than, for instance, that of the face.
• The iris has a fine texture that like fingerprintsis determined randomly during embryonic gesta-tion. Even genetically identical individuals have completely independent iris textures, whereas DNA (genetic ”fingerprinting”) is not unique for the about 0.2% of the human population who have a genetically identical twin.
• An iris scan is similar to taking a photograph and can be performed from about 10cm to a few meters away. There is no need for the person to be identified to touch any equipment that has recently been touched by a stranger, thereby eliminating an objection that has been raised in some cultures against fingerprint scanners, where a finger has to touch a surface, or retinal scanning, where the eye can be brought very close to a lens (like looking into a microscope lens).
• It is non-invasive, as it does not use any laser technology, just simple video technology. The camera does not record an image unless the user actually engages it.
• It poses no difficulty in enrolling people that wear glasses or contact lenses.
• Proven highest accuracy: iris recognition had no false matches in over two million cross-comparisons, according to Biometric Product Testing Final Report (19 March 2001, Center for Mathematics and Scientific Computing, National Physics Laboratory, U.K.).
• Iris patterns possess a high degree of randomness
– variability: 244 degrees-of-freedom .
– entropy: 3.2 bits per square-millimeter .• The iris is mostly flat, and its geometric configuration is only controlled by two complementary muscles (the sphincter pupillae and dilator pupillae) that control the diameter of the pupil.This makes the iris shape far more predictable than, for instance, that of the face.
• The iris has a fine texture that like fingerprintsis determined randomly during embryonic gesta-tion. Even genetically identical individuals have completely independent iris textures, whereas DNA (genetic ”fingerprinting”) is not unique for the about 0.2% of the human population who have a genetically identical twin.
• An iris scan is similar to taking a photograph and can be performed from about 10cm to a few meters away. There is no need for the person to be identified to touch any equipment that has recently been touched by a stranger, thereby eliminating an objection that has been raised in some cultures against fingerprint scanners, where a finger has to touch a surface, or retinal scanning, where the eye can be brought very close to a lens (like looking into a microscope lens).
• It is non-invasive, as it does not use any laser technology, just simple video technology. The camera does not record an image unless the user actually engages it.
• It poses no difficulty in enrolling people that wear glasses or contact lenses.
• Proven highest accuracy: iris recognition had no false matches in over two million cross-comparisons, according to Biometric Product Testing Final Report (19 March 2001, Center for Mathematics and Scientific Computing, National Physics Laboratory, U.K.).
• Iris patterns possess a high degree of randomness
– variability: 244 degrees-of-freedom .
– uniqueness: set by combinatorial complexity.
•It would only take 1.7 seconds to compare one million Iris Codes on a 2.2GHz computer.
reference:
Seema Sheoran, writer and author of IRIS RECOGNITION - A BIOMETRIC TECHNOLOGY,
<http://www.scribd.com/doc/52565425/Iris-Recognition>
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