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Ioannis A. Kakadiaris is a Greek-born American computer scientist who has developed an identity verification system at the University of Houston.
Early life and education

Ioannis A. Kakadiaris received his B.Sc. in Physics (1989) from the University of Athens. After moving to the USA he received M.Sc. in Computer Science (1991) from Northeastern University (Boston, MA) and his Ph.D. in Computer Science (1997) from the University of Pennsylvania (Philadelphia, PA).
Identity verification system

The system works by extracting a unique biometric signature of a person's face based on combination of 3D shape, texture, infrared, and time variables. While earlier face recognition methods have focused on appearance - capturing, representing, and matching facial characteristics as they appear on 2D images in the visible spectrum, the proposed URxD system uses a webcam to capture a continuous video stream which is used to detect whether a person is facing the 3D camera, and if the subject is facing the camera relatively still for more than two seconds, the system triggers the optical scanner and the 3D data are captured. It can also determine whether the person is wearing glasses. The system has achieved the best published results when tried to 4,007 datasets as a part of the international face recognition Grand Challenge organized by NIST in 2007.

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