(12) United States Patent ao) Patent No.: us 6,757,411 B2
Chau (45) Date of Patent: Jun. 29,2004
A10 MB/S Data Storage System Using a Commercial Video
Tape Recorder; William M. Loh; Apr. 1980; Department ol
Electrical Engineering University ol Toronto.
Friction Ridge Indentification based on Pore Structure—A
case Study; Constable Frank Barclay, Thunder Bay Police
Force, Canada; Jan. 1997; pp 7 to 13.
Identification Note; Poroscopy; Cpl. D.R. Ashbaugh, The
Pas RCMP Indent. Section,The Pas, Manitoba; vol. 45 No.
2, 1983; R.C.M.P. Gazette; pp 12 to 17.
Identiication Note; Fingerprint Identification Today; Cpl.
D.R. Ashbaugh, NCO i/c The Pas RCMP Ident. Section, The
Pas, Manitoba; vol. 45, No. 12, 1983; R.C.M.P. Gazette; pp
19 to 22.
Identification Note; Edgeology; Cpl. D.R. Ashbaugh, NCO i/c Identification Section, The Pas, RCMP Detachment, The Pas, Manitoba; vol. 44, No. 2, 1982; R.C.M.P. Gazette; pp 4 to 6.
(List continued on next page.)
Primary Examiner—-Timothy M. Johnson
Assistant Examiner—Ali Bayat
A method, system and computer readable-storage medium for generating an identification code from a fingerprint image exhibiting a plurality ol leatures. The method includes establishing a relerence point from the plurality ol leatures, generating at least one metric from the relerence point and at least one ol the plurality ol leatures and forming the identification code from the at least one metric. Changes in the temperature and humidity ol a finger when the image is taken at different times will result in minor variations ol the measured leatures which, upon quantization, result a metric that is invariant from one fingerprint image to the next, lor the same finger. This lowers the lalse rejection rate to an acceptable level. Meanwhile, the metric is sufficiently unique for a given set ol leatures such that the probability ol assigning the same metric to two different fingers is lowered to an acceptable level.
44 Claims, 15 Drawing Sheets
INTO SUB GRAPHS
ESTABLISH AT LEAST
OWE REFERENCE POINT
GENERATE AT LEAST