Fingerprint verification method employing plural correlation judgement levels and sequential judgement stages
Patent 5040223 Issued on August 13, 1991. Estimated Expiration Date: 
February 17, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 17, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesOperator interactive pattern processing system Apparatus and method of personal identification by fingerprint comparison Fingerprint imaging apparatus Finger identification Fingerprint image refinement Fingerprint verification method Patent #: 4581760 InventorsAssigneeApplicationNo. 311834 filed on 02/17/1989US Classes:382/127, With a prism382/227With a multilevel classifierExaminersPrimary: Boudreau, Leo H.Attorney, Agent or FirmForeign Patent References
International ClassG06K 009/00Foreign Application Priority Data1988-02-17 JPAbstractA method of fingerprint verification in which an input fingerprint is compared with a previously registered fingerprint, wherein the degree of correlation between a first section of the registered fingerprint and the input fingerprint is first determined by first-stage verification processing. If the correlation is higher than a first threshold value the input fingerprint is accepted, if lower than a second threshold value it is rejected, and if between these values, second-stage verification processing is executed in which a different section of the registered fingerprint is compared with the input fingerprint, and a final judgement made accordingly.Other References
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