Image analysis – Applications
Patent
1997-05-13
2000-05-16
Johns, Andrew W.
Image analysis
Applications
382152, G06K 900
Patent
active
060647477
ABSTRACT:
An apparatus and method for identifying a key using a housing having a support that allows light to pass therethrough adjacent the key, a light source for emitting light through at least a portion of the support so as to form a first image of at least a portion of the profile of the key, a substantially planar light beam directed at the key so as to form a second image as the light beam interfaces with the side of the key, and a receiving means for receiving the first image of the profile of the key and receiving the second image so that the non-planar portion of the side of the key forms a non-linear segment across the width of the key. The present invention then can digitize the first and second images and create key information from the digitized images, in which the information is compared to stored information about a plurality of reference keys. Reference keys are eliminated by comparing the length, the head shape, and information of the light beam interfacing with each of the reference keys to determine the type of key in the housing.
REFERENCES:
patent: 4899391 (1990-02-01), Cimino et al.
patent: 5127532 (1992-07-01), Cimino et al.
patent: 5517299 (1996-05-01), Teratani et al.
patent: 5617323 (1997-04-01), Stansberry et al.
patent: 5771176 (1998-06-01), Froehlich et al.
patent: 5807042 (1998-09-01), Almblad et al.
Axelrod Norman N.
Berilla James A.
Burba Bryce
Kromann Roger F.
Schroeder Wesley A.
Axxess Technologies, Inc.
Johns Andrew W.
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