Image analysis – Applications – Personnel identification
Patent
1995-08-30
1998-02-03
Boudreau, Leo
Image analysis
Applications
Personnel identification
382290, 382274, 382276, G06K 900
Patent
active
057153256
ABSTRACT:
A detection system identifies a person by rapidly analyzing an image frame from a video camera for the presence of a face by reducing the image in resolution and normalizing the image to compensate for lighting changes and compares the normalized image with a background image to produce a binary interest mask. The most likely position of a face is then determined by identifying a top, bottom and sides of a possible head region to define a bounding box, normalizing the pixel data within the bounding box to further compensate for lighting variations, and resizing the box to match identification templates stored in memory. The best match from the identification templates is provided with a score indicative of the degree of the match. If the score does not exceed a first score threshold, then no face is assumed present. If the score exceeds a first and second score threshold, then a face is assumed present. If the first score threshold is exceeded but the second is not, a further eye location procedure is performed on the data to determine if a face is present.
REFERENCES:
patent: 5012522 (1991-04-01), Lambert
patent: 5432864 (1995-07-01), Lu et al.
patent: 5497430 (1996-03-01), Sadovnik et al.
patent: 5561718 (1996-10-01), Trew et al.
Brunelli et al, "Face Recognition : Features versus templates", IEEE Transactions on Pattern Analysis & Machine Int elligence, vol. 15, No. 10; Oct. 1993.
Gunn et al, "A dual active contour for head boundary extraction", IEE Colloq. No. 100,1994.
Andress Keith M.
Bang Richard D.
Fang Ming
Schwartz Stuart C.
Boudreau Leo
Mehta Bhavesh
Paschburg Donald B.
Siemens Corporate Research Inc.
The Trustees of Princeton University
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