Patent ID: 6424728
Filing Date: 2002-07-23
Classification: G06K

Abstract:
A system for automatic signature authentication comprising:a) a computer-implementable signature processing program to examine a digitized signature image obtained from a document, optionally a check, the signature image purportedly being the signature of a specific person, to generate an authentication decision authenticating the signature as genuine or rejecting the signature as a forgery; b) an authenticated signature database of signature features for use by the signature processing program in generating the authentication decision; and c) an evaluation program to evaluate the results produced by the signature processing program and to provide update information to the signature database for use by the signature processing program regarding examined signatures accepted as genuine by the signature processing program; wherein:d) the digitized signature image is scanned from a paper document; e) multiple versions of the signature image are electronically generated and examined; f) the results of examination are statistically compiled to enhance the authentication decision; g) each version of the signature image is defined into segments, signature features are extracted from individual segments and the extracted signature features are evaluated against training data received from the evaluation program; and h) the extracted signature features are each analyzed globally for the complete signature and locally for each segment.