Fingerprint verification method employing plural correlation jud

Image analysis – Histogram processing – For setting a threshold

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382 38, G06K 900

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active

050402234

ABSTRACT:
A 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.

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Cutaia, "Multilevel Character Recognition System", IBM Tech. Disclosure Bulletin, vol. 13, No. 12, May 1971, pp. 3739-3742.
"Fingerprint Verification System Using Pattern-Matching Algorithm" by Osamu Eguchi et al; PRU 88-83; pp. 65-72, 11/18/1988.

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