Fingerprint correlation system with parallel FIFO processor

Details Fingerprint correlation system with parallel FIFO processor Fingerprint correlation system with parallel FIFO processor

1990-07-20

1991-10-01

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 34, 382 42, G06K 968

Patent

active

050540904

ABSTRACT:
A method and apparatus for parallel processing "live" and pre-recorded "reference" fingerprint data for comparison purposes. An array sensor images a selected portion of a live fingerprint and video means produce corresponding digital live image data. The pre-recorded, multi-pixel reference data and the image data are scanned relative to one another via recirculating First-in-First-Out (FIFO) buffer memories and row and column shift means. Exclusive OR (XOR), summation and accumulation circuitry simultaneously compare the reference and image data over a plurality of correlation cycles and compute a correlation value for each correlation cycle. A microprocessor determines the best correlation value of the reference and image data from a tabular store of correlation values for each correlation cycle relative to a PASS/FAIL threshold.

REFERENCES:
patent: 3527535 (1970-09-01), Monroe
patent: 3968476 (1976-07-01), McMahon
patent: 4246568 (1981-01-01), Peterson
patent: 4547864 (1985-10-01), Kawabata
patent: 4641350 (1987-02-01), Bunn
patent: 4690554 (1987-09-01), Froelich
Arnold W. Knight, Richard J. Grommes, David L. Hagen, U.S. Air Force Report BMOTR-85-37, "Rapid and Accurate Personnel Identification System", Jun. 1, 1985.

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