Automatic key identification system

Details Automatic key identification system Automatic key identification system

1988-06-24

1990-02-06

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 2, 382 8, 358 93, 358101, 340680, G06K 900

Patent

active

048993913

ABSTRACT:
A system for identifying and matching key blanks when duplicating an original key. A key holder is provided which positions the key horizontally along its longitudinal axis with the key's flat sides in a vertical plane. A lensing subsystem lights and forms an image of the front profile of the key. A video camera converts the light image into an electrical signal which is digitized and stored in computer memory. The computer compares the key image with stored images of known key blanks and signals the locksmith by means of an output subsystem the proper key blank to be used in duplicating the key.

REFERENCES:
patent: 3865011 (1975-02-01), Patriquin
patent: 4051748 (1977-10-01), Sherman
patent: 4090303 (1978-05-01), Uyeda
patent: 4143582 (1979-03-01), Heimann
patent: 4614465 (1986-09-01), Wu
patent: 4717294 (1988-01-01), Grasser
patent: 4805224 (1989-02-01), Koezuka et al.
patent: 4809341 (1989-02-01), Matsui et al.

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