Data input pen for Signature Verification

Details Data input pen for Signature Verification Data input pen for Signature Verification

1982-06-30

1985-04-23

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 59, 73432A, G06K 924

Patent

active

045134375

ABSTRACT:
A writing implement having special applicability for use as a pressure and acceleration sensitive element for use in a Signature Verification System. The pen structure includes both a writing implement for making a visible record and also includes unique transducer structures for providing both acceleration and pressure data to a remotely located verification system. The pressure sensing element is axially mounted within the pen and produces pressure signals due to axial pressure on the pen tip as an individual writes. The accelerometer structure comprises a hollow tubular piezoelectric member supported at one end and having four circumferentially disposed electrodes on the outer surface thereof, which are appropriately interconnected to produce two orthogonal acceleration component signals A.sub.x and A.sub.y.

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patent: 3962679 (1976-06-01), Engelbrecht
patent: 3983535 (1976-09-01), Herbst et al.
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patent: 4131880 (1978-12-01), Siy et al.
patent: 4142175 (1979-02-01), Herbst et al.
patent: 4263592 (1981-04-01), Takahashi et al.
patent: 4345239 (1982-08-01), Elliott
EerNisse et al., "Piezoelectric Sensor Pen for Dynamic Signature Verification", Conf. 1977 Int. Electron Devices Meeting, Wash., D.C., 12-1977, pp. 473-476.
IBM Technical Disclosure Bulletin, entitled "Optimal Designs of Instrumented Pens for Signature Verification", by J. S. Lew, vol. 21, No. 8, p. 3415, Jan. 1979.

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