Iris-based biometric identification
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United States of America Patent
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Oct 28, 2008
Grant Date -
Jan 31, 2008
app pub date -
Aug 14, 2007
filing date -
Mar 22, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A method includes forming a feature vector associated with an iris of an individual using a transform operation including converting an iris image into a log-polar image, scaling one or more samples in the log-polar image according to a Fourier-Mellin transform, and performing a Fourier transform on the scaled samples. The method involves forming an iris digest based on the feature vector, and creating a biometric identifier based on the iris digest. A system includes an iris scanner, an iris analyzer that forms an image of a human iris wherein the presence of eyelashes in the image is minimized, forms a feature vector associated with the iris image using a modified Fourier-Mellin transform, and compresses the feature vector into an iris digest.
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