Method for determining a reference autograph character string on

Details Method for determining a reference autograph character string on Method for determining a reference autograph character string on

1996-03-12

1998-09-01

Boudreau, Leo

Image analysis

Applications

Personnel identification

382120, 382187, G06K 900

Patent

active

058022007

ABSTRACT:
In a method for determining a reference autograph character string on the basis of a set of sample autograph character strings from the same writer, a particularly characteristic autograph character string can be selected from a set of produced sample autograph character strings, e.g. signatures. In signature verification, such references are needed to serve as a comparison measure in the identification of the signer. The method according to the invention divides the produced character strings of a sample set of signatures into strokes according to the execution, and compares individual strokes with respect to the recorded dynamic parameters, such as for example pressure and locus coordinates and writing speed, in order to enable the determination of the deviation of all the strokes of the sample character strings from one another. From the set of sample character strings, that string is then selected as the reference character string which comprises the smallest values to the totality of all other sample character strings. In this way it is ensured that the most representative sample character string is brought into use as the reference character string.

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patent: 5454046 (1995-09-01), Carman, II
patent: 5553156 (1996-09-01), Obata et al.
patent: 5577135 (1996-11-01), Grajski et al.
"Automatic Signature Verification and Writer Identification--The State of the Art", Plamondon et al, Pattern Recognition, vol. 22, No. 2, pp. 107-131, 1989.
Yoshimura et al Signature Verification Incorporating Pen Movement, pp. 2085-2093--IEICE Transactions, vol. E 74 No. 7 Jul. 1991.
The Use Of A One-Stage Dynamic Programming Algorithm for Connected Word Recognition, IEEE Transactions On Acoustics, Speech, And Signal Processing, vol., ASSP, 32 No. 2, Apr. 1984.
Online Signature Verification Based On Shape, Motion, and Writing Pressure, Sato et al.,1982 IEEE pp. 823-827.

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