Image analysis – Histogram processing – For setting a threshold
Patent
1993-02-19
1994-06-28
Couso, Jose L.
Image analysis
Histogram processing
For setting a threshold
361278, 3612831, G06K 900, H01G 700
Patent
active
053254422
ABSTRACT:
A Fingerprint sensing device and a recognition system having a row/column array of sense elements which are coupled to a drive circuit and a sense circuit by sets of row and column conductors, respectively. The sense elements are actively addressable by the drive circuit. Each sense element contains a sense electrode and a switching device (e.g., a TFT) for active addressing of that sense electrode. The sense electrodes of the sense elements are covered by insulating material adapted for receiving, directly thereon or on respective conductive pads overlying the sense electrodes, a finger. Capacitances resulting from individual finger surface portions in combination with sense electrodes are sensed by the sense circuit by applying a potential to the sense electrodes and measuring charging characteristics. In the fingerprint recognition system, an output from the sensing circuit is analyzed and characteristical data is compared with stored characteristical data for identification and verification purposes.
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C. J. Elliott entitled "Automatic Fingerprint Recognition" in Parallel Processing State of the Art Report published in 1987 by Pergamon Infotech.
Fukue et al entitled "Fingerprint Verification System-Verification Algorithm" published in IEEE TENCON 87, Seoul, 1987 at pp. 71-75.
Couso Jose L.
U.S. Philips Corporation
Weiss Richard A.
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