Handwriting verification system

Details Handwriting verification system Handwriting verification system

1976-04-28

1977-08-02

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

G06K 900

Patent

active

040400123

ABSTRACT:
Identification of a specimen signature is provided by comparing the specimen with a previously recorded template signature. The comparison is performed by recording, for both specimen and template signatures, signals representing forces in three directions while generating these signatures. For handwritten signatures these forces are called pressure, for the force perpendicular to the plane of the paper, X for the left-right force in the plane of the paper, and Y for the near-far force in the plane of the paper.
The recorded specimen signals are divided into equal parts, for example halves, and successive comparisons are made of the equal parts, first without any displacement, then with relative displacements, then by expanding the length of parts relative to one another, then by reducing the length of parts relative to one another, to find the highest correlation values for all of these comparisons. These are combined and compared with a reference.

REFERENCES:
patent: 3579186 (1971-05-01), Johnson et al.
patent: 3699517 (1972-10-01), Dyche
patent: 3767907 (1973-10-01), Radcliffe, Jr.
patent: 3818443 (1974-06-01), Radcliffe, Jr.

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