Image analysis – Applications – Personnel identification
Patent
1997-07-14
1999-06-29
Mancuso, Joseph
Image analysis
Applications
Personnel identification
382209, G06K 900
Patent
active
059179287
ABSTRACT:
A system and method for verifying identity of a user seeking access to a secured area or object is provided. The system employs a novel global image comparison approach by first acquiring a reference fingerprint image from a user during an enrollment stage, obtaining a set of multiple reference segments from the reference image representative of unique portions thereof, and later during a verification stage obtaining a verification fingerprint image from a user seeking access to the secured area or object, determining the most likely positions for the multiple reference segments over the verify image, and then comparing all pixels of the reference image enclosed by the multiple reference segments to all pixels in a portion of the verify image overlaid by the multiple reference segments in their current positions over the verify image in accordance with a dynamically determined threshold that is individually tailored for the user providing the reference image during the enrollment stage. When the threshold is exceeded, the user seeking access is granted access to the secured object or area; otherwise the user is rejected. The system of the present invention includes the capability of determining multiple most likely positions for the multiple reference segments over the verify image and then sequentially matching the reference segments to the verify image portion overlaid by them in their current position against the dynamic threshold until a match is found or until it is determined that the verify and reference images are not matched. To speed up the verification process, the verify image and one of the multiple reference segments may be temporarily coarsened during the process of determining multiple possible most likely positions for the multiple reference segments.
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Berestetskiy Mikhail
Pletnev Alexandre
Shpuntov Mikhail
BES Systems, Inc.
Mancuso Joseph
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