Image analysis – Histogram processing – For setting a threshold
Patent
1984-05-17
1987-02-03
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
356 71, 382 30, 382 34, G06K 900
Patent
active
046413502
ABSTRACT:
A fingerprint identification system includes a scanner, a memory for storing data representative of fingerprints received from the scanner, means for comparing newly received data to reference data, and means for determining the degree of distortion and misregistration present in the new data relative to the reference data. The new data and the reference data are stored in arrays. The arrays are compared by a method which includes dividing the reference array into sub-arrays and comparing the elements of each sub-array with the elements of a number of sub-arrays of the new data array. This technique allows the reference array to be stretched and/or compressed to account for distortion and/or misregistration in the new data array. Apparatus designed to insure nominal finger registration and to protect the optical surface of the scanner from dirt, grease and other contamination is also provided.
REFERENCES:
patent: 3200701 (1965-08-01), White
patent: 3201961 (1965-08-01), Williams et al.
patent: 3383657 (1968-05-01), Claassen et al.
patent: 3527535 (1970-09-01), Monroe
patent: 3581282 (1971-05-01), Altman
patent: 3584958 (1971-06-01), Miller
patent: 3905045 (1975-09-01), Nickel
patent: 3944978 (1976-03-01), Jensen et al.
patent: 3975711 (1976-08-01), McMahon
patent: 4053228 (1977-10-01), Schiller
patent: 4110737 (1978-08-01), Fahey
patent: 4185270 (1980-01-01), Fischer et al.
patent: 4186378 (1980-01-01), Moulton
patent: 4200861 (1980-04-01), Hubach et al.
patent: 4210899 (1980-07-01), Swonger et al.
patent: 4246568 (1981-01-01), Peterson
patent: 4435835 (1984-03-01), Sakow et al.
patent: 4450579 (1984-05-01), Nakashima et al.
patent: 4479145 (1984-10-01), Azuma et al.
patent: 4525859 (1985-06-01), Bowles et al.
patent: 4581760 (1986-04-01), Schiller et al.
Boudreau Leo H.
Mancuso Joseph
LandOfFree
Fingerprint identification system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fingerprint identification system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fingerprint identification system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1095663