Image analysis – Histogram processing – For setting a threshold
Patent
1987-10-08
1989-10-24
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 2, 382 31, 356 71, 350376, 35016212, G06K 900
Patent
active
048767255
ABSTRACT:
The invention relates to an optical processing fingerprint verification device. A light source illuminates a prism upon which the user has placed two fingers to that light reflected from the prism is modulated by the data of the users fingerprints. The fingerprint data beam passes through a lens and undergoes a Fourier transform at a card including a reflection hologram matched to two fingerprints of a reference individual. The intensity distribution of the ligh reflected from the hologram determines whether a match exists. Use of a reflection hologram allows use of an incoherent light source. The two fingers are located on the prism by movable guides positioned by information on the card as to the relative length and the width of the two fingers of the reference individual. This provides a second level of verification. Scaling sensitivity may be reduced by utilizing a frequency multiplexed hologram.
REFERENCES:
patent: 3511571 (1970-05-01), Ogle
patent: 3532426 (1970-10-01), Lemmond
patent: 3704949 (1972-12-01), Thomas
patent: 3716301 (1973-02-01), Caulfield
patent: 3743421 (1973-07-01), Maloney
patent: 3781113 (1973-12-01), Thomas
patent: 3807829 (1974-04-01), Close
patent: 3873970 (1975-03-01), McMahon
patent: 3891968 (1975-05-01), McMahon
patent: 3944978 (1976-03-01), Jensen
patent: 4053228 (1977-10-01), Schiller
patent: 4206965 (1980-06-01), McGrew
patent: 4357597 (1982-11-01), Butler
patent: 4641350 (1987-02-01), Bunn
patent: 4764889 (1988-08-01), Hinton et al.
Boudreau Leo H.
Couso Jose L.
Faggetter Ronald D.
Mytec Technologies Inc.
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