07-Biometrics-Lecture-7-Part2-1-2008-11-03

07-Biometrics-Lecture-7-Part2-1-2008-11-03 - Master SC...

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1 Biometrics http://scgwww.epfl.ch/courses Master SC – Information and Communication Security Dr. Andrzej Drygajlo Speech Processing and Biometrics Group Signal Processing Institute Ecole Polytechnique Fédérale de Lausanne (EPFL) Center for Interdisciplinary Studies in Information Security (ISIS)
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3 Daugman’s Approach J. Daugman, “Biometric Personal Identification System Based on Iris Analysis“, US Patent 5291560, 1994
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4 Iris Recognition Generalities Iridology Properties of the iris Applications Iris sensing Iris features Iris matching Performance evaluation Identification
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5 Iris Recognition
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6 Iris under different lighting Visible light Layers visible Less texture information Melanin absorbs visible light Infrared light Melanin reflects most infrared light More texture is visible Preferred for iris recognition systems
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7 Illumination
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8 Image Acquisition To capture the rich details of iris patterns, an imaging system should resolve a minimum of 70 pixels in iris radius (typical 100-140 pixels) Monochrome CCD cameras (480 x 640) have been used because near infrared (NIR) illumination in the 700nm – 900nm band was required for imaging to be invisible to humans. In
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  • Fall '08
  • Jamespotvein
  • Coordinate system, Polar coordinate system, Iris recognition, iris Applications Iris, Iris features Iris

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07-Biometrics-Lecture-7-Part2-1-2008-11-03 - Master SC...

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