Method of comparing a handwriting with a reference writing

Details Method of comparing a handwriting with a reference writing Method of comparing a handwriting with a reference writing

1988-10-07

1990-02-13

Picard, Leo P.

Image analysis

Histogram processing

For setting a threshold

382 13, G06K 900

Patent

active

049013580

ABSTRACT:
A method of comparing a handwriting with a reference writing by the measurement of signals V.sub.x and V.sub.y characteristic of the speed components along the abscissa and ordinate respectively of a rectangular co-ordinate system. Each speed signal V.sub.x and V.sub.y of the handwriting and the reference writing are divided into discreet time segments of the movements which produced the writing, the position of each such segment of the writing being coordinated with the corresponding segments of the movement of the reference writing, and determining a correction factor which is dependent upon the time variation between each movement segment of the handwriting and the corresponding movement segment of the reference writing.

REFERENCES:
patent: 3699517 (1972-10-01), Dyche
patent: 4040012 (1977-08-01), Crane et al.
patent: 4128829 (1978-12-01), Herbst et al.
patent: 4363023 (1982-12-01), Bechet
patent: 4397033 (1983-08-01), Bechet
patent: 4495644 (1985-01-01), Parks et al.
patent: 4646351 (1987-02-01), Asbo et al.
Herbst, "Automatic Signature Verification Based on Accelerometry", 1981.

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