Image analysis – Histogram processing – For setting a threshold
Patent
1991-05-14
1992-05-05
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 9, G06K 900
Patent
active
051115123
ABSTRACT:
A method and apparatus are described for verifying handwritten, human signatures, and for permitting access to a system if such a signature is accepted. In an initializing stage, an authorized entrant submits a sample of multiple signatures. A first reference signature is selected from the sample, and a second reference signature is constructed by averaging over the sample. When a subsequent, prospective entrant submits a signature, a dynamic mismatch is calculated with respect to the first reference signature, and a shape mismatch is calculated with respect to the second reference signature. The signature is accepted if it satifies a predetermined criterion that refers to the dynamic and shape mismatch values.
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Fan Jason Chia-Sun
Hastie Trevor J.
Kishon Eyal
AT&T Bell Laboratories
Boudreau Leo H.
Finston M. I.
Pacher E. E.
Stellrecht Barry
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