Sign verification

Details Sign verification Sign verification

1987-06-15

1988-06-21

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 13, 235379, 235380, 34082533, 34082534, G06K 900

Patent

active

047529652

ABSTRACT:
A self contained writing pad unit (1) comprises a pressure pad (7) for sensing movement of a writing instrument over a contact surface (2) of the unit when a user writes a sign, for example a signature, either directly on the contact surface or on a writing medium (4) supported by the contact surface. Electronics (8) including a RAM and timing systems determine data relating to the original signature. A power supply (9) is provided to enable operation of the electronics (8). The unit (1) is portable and the data represents dynamic characteristic features of the writing signature.

REFERENCES:
patent: 3806704 (1974-04-01), Shinal
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patent: 4028674 (1977-06-01), Chuang
patent: 4070649 (1978-01-01), Wright, Jr. et al.
patent: 4105156 (1978-08-01), Dethloff
patent: 4139837 (1979-02-01), Liljenwall et al.
patent: 4202626 (1980-05-01), Mayer, Jr. et al.
patent: 4262281 (1981-04-01), Buckle et al.
patent: 4341951 (1982-07-01), Benton
patent: 4523087 (1985-06-01), Benton
patent: 4689478 (1987-08-01), Hale et al.

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