Image analysis – Applications – Personnel identification
Reexamination Certificate
1997-09-22
2001-03-13
Boudreau, Leo H. (Department: 2721)
Image analysis
Applications
Personnel identification
Reexamination Certificate
active
06201886
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an image collation device, which is applied, for example, as a fingerprint collation device. In the present invention, an image collation device records linear images in a memory means, and judges a collation target image with reference to these linear images, thereby it is possible to collate an image with a simple structure.
2. Description of the Related Art
Heretofore, in the conventional fingerprint collation device using an image collation device of this sort, featured points such as branch point and cut (referred to as featured point hereinafter) are extracted from a fingerprint image obtained by means of an image pick-up device, and fingerprint collation is performed with reference to these featured points.
In other words, in the conventional fingerprint collation device, a fingerprint to be collated is previously converted to database with reference to, for example, featured points and coordinate values. A fingerprint image to be subjected to fingerprint collation is subjected to image processing in order to extract featured points. Then, a database has an access to the extracted featured points and the fingerprint is collated based on the existence of corresponding featured points.
The conventional fingerprint collation is disadvantageous in that it takes a long time to find featured points and fingerprint collation takes a long time. If fingerprint collation is carried out consistently within a short time, the fingerprint collation device provides improved convenience for use, and such improvement is desirable.
An alternative method that involves fingerprint collation based on image data instead of finger print collation based on featured point has been considered to solve such problem. According to this method, the time required to extract featured points is eliminated, and the time required for fingerprint collation is shortened.
However, for fingerprint collation based on image data, it is required to construct finger print image database, the fingerprint image database should have a large structure. Such database requires a memory means having a large capacity. The large capacity results in a complex whole structure, and such complex structure is a problem.
The present invention is accomplished to solve such problem, and provides an image collation device which is capable of collating an image such as fingerprint with a simple structure.
SUMMARY OF THE INVENTION
To solve such problem, in the present invention, image data which are linear images cut from a first image is stored in a prescribed memory means. Then, the image data stored in the memory means is compared with the image data which is a second image to judge the coincidence.
Because of linear images cut from the first image, the first image is allowed to be stored in a memory means having a small capacity. Therefore, the image data stored in this memory means is compared with the image data of the second image to judge the coincidence, and the collation device can judge the coincidence between the first image and second image with a simple structure.
REFERENCES:
patent: 4581760 (1986-04-01), Schiller et al.
patent: 4641350 (1987-02-01), Bunn
patent: 4811414 (1989-03-01), Fishbine et al.
patent: 4827527 (1989-05-01), Morita et al.
patent: 4832485 (1989-05-01), Bowles
patent: 5067162 (1991-11-01), Driscoll, Jr. et al.
patent: 5077803 (1991-12-01), Kato et al.
patent: 5568563 (1996-10-01), Tanaka et al.
patent: 5781651 (1998-07-01), Hsiao et al.
patent: 5848176 (1998-12-01), Hara et al.
patent: 5850466 (1998-12-01), Schott
patent: 5852670 (1998-12-01), Setlak et al.
Boudreau Leo H.
Frommer William S.
Frommer Lawrence & Haug LLP.
Smid Dennis M.
Sony Corporation
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