1
Malcolm K Sparrow: Fingerprint recognition and retrieval system. Jim Zegeer, May 24, 1988: US04747147 (149 worldwide citation)

Fingerprints are scanned by a scanning system (13). Topological systems for coding and comparing fingerprints are described, including a system for recording a description of fingerprints. In a preferred embodiment, a central point of the fingerprint is selected as a center of rotating scan line. Th ...


2
Malcolm K Sparrow: Fingerprint recognition and retrieval system. Jim Zegeer, March 28, 1989: US04817183 (148 worldwide citation)

Fingerprints are scanned by a scanning system (13). Topological systems for coding and comparing fingerprints are described including a system for recording a description of fingerprints. In a preferred embodiment, a central point of the fingerprint is selected as a center of rotating scan line. The ...


3
Malcolm K Sparrow: Vector based topological fingerprint matching. Jim Zegeer Esq, May 20, 1997: US05631971 (45 worldwide citation)

A fingerprint recognition and retrieval system in which the positions of fingerprint minutiae points and an index number for each minutiae point are recorded in a storage medium. The local ridge flow direction in the vicinity of each minutiae point defined by ridge endings and ridge bifurcations is ...


4
Sparrow Malcolm K: Systeme didentification et de prelevement dempreintes digitales, Fingerprint recognition and retrieval system. Sparrow Malcolm K, BORDEN LADNER GERVAIS, June 12, 1990: CA1270332

ABSTRACT Fingerprints are scanned by a scanning system (13). Topological systems for coding and comparing fingerprints are described, including a system for recording a description of fingerprints. In a preferred embodiment, a central point of the fingerprint is selected as a center of rotating scan ...


5
Sparrow Malcolm K: Vector based topological fingerprint matching. Sparrow Malcolm K, ZEGEER Jim, November 30, 1995: WO/1995/032482

A fingerprint recognition and retrieval system in which the positions of fingerprint minutiae points (05) and an index number for each minutiae point (05) are recorded in a storage medium (17). The local ridge flow direction in the vicinity of each minutiae point (05) defined by ridge endings and ri ...


6
Sparrow Malcolm K: Fingerprint recognition and retrieval system. Zegeer Jim, Sparrow Malcolm K, ZEGEER Jim, February 26, 1987: WO/1987/001224

Fingerprints are scanned by a scanning system (13). Topological systems for coding and comparing fingerprints including a system for recording a description of fingerprints. In a preferred embodiment, a central point of the fingerprint is selected as a center of rotating scan line. The scan line is ...


7
Sparrow Malcolm K: Fingerprint recognition and retrieval system.. Zegeer Jim, Sparrow Malcolm K, September 2, 1987: EP0233919-A1

Fingerprints are scanned by a scanning system (13). Topological systems for coding and comparing fingerprints including a system for recording a description of fingerprints. In a preferred embodiment, a central point of the fingerprint is selected as a center of rotating scan line. The scan line is ...