Method for authenticating an individual by use of fingerprint data
First Claim
1. A method for authenticating an individual by use of fingerprint data, comprising:
- obtaining a biometrics fingerprint signature template (“
BFST”
) for the individual in an enrollment process by the following steps;
selecting a plurality of bands for the BFST;
obtaining a plurality of tracks corresponding to each of the plurality of bands by use of an enrollment frame of a selected finger of the individual, wherein the plurality of bands are spatially referenced to the enrollment frame and can be spatially referenced to a reference barrier; and
determining whether there is a match between a candidate finger and the BFST in an authentication process by the following steps;
selecting a swipe direction and an access code for the individual;
obtaining a plurality of candidate tracks from the candidate finger through use of the reference barrier in an authentication unit so that each of the plurality of candidate tracks is spatially referenced so as to be within a corresponding one of the plurality of bands;
calculating a similarity index for each of the plurality of candidate tracks and each of the plurality of tracks for the band to which the candidate track corresponds by use of a Fast Fourier-transform fingerprint algorithm; and
using the maximum similarity index calculated for each of the plurality of tracks in the preceeding step to determine if the candidate finger and the BFST match.
0 Assignments
0 Petitions
Accused Products
Abstract
A method for authenticating an individual by use of fingerprint data that involves two different broad steps. The first step is to obtain a biometrics fingerprint signature template (“BFST”) for an individual in an enrollment process by selecting a plurality of bands for the BFST and obtaining a plurality of tracks corresponding to each of the plurality of bands by use of an enrollment frame of a selected finger of the individual, wherein the plurality of bands are spatially referenced to the enrollment frame and can be spatially referenced to a reference barrier. The second step is to authenticate (or not) a candidate finger against one or more BFST in an authentication process in which a swipe direction and an access code for the individual are selected, a plurality of candidate tracks are obtained from the candidate finger through use of the reference barrier in an authentication unit so that each of the plurality of candidate tracks is spatially referenced so as to be within a corresponding one of the plurality of bands, calculating a similarity index for each of the plurality of candidate tracks and each of the plurality of tracks for the band to which the candidate track corresponds by use of a Fast Fourier-transform fingerprint algorithm, and multiplying each maximum similarity index obtained for each of the plurality of candidate tracks to obtain a match index which indicates a match if it exceeds a preselected threshold.
-
Citations
84 Claims
-
1. A method for authenticating an individual by use of fingerprint data, comprising:
-
obtaining a biometrics fingerprint signature template (“
BFST”
) for the individual in an enrollment process by the following steps;selecting a plurality of bands for the BFST; obtaining a plurality of tracks corresponding to each of the plurality of bands by use of an enrollment frame of a selected finger of the individual, wherein the plurality of bands are spatially referenced to the enrollment frame and can be spatially referenced to a reference barrier; and determining whether there is a match between a candidate finger and the BFST in an authentication process by the following steps; selecting a swipe direction and an access code for the individual; obtaining a plurality of candidate tracks from the candidate finger through use of the reference barrier in an authentication unit so that each of the plurality of candidate tracks is spatially referenced so as to be within a corresponding one of the plurality of bands; calculating a similarity index for each of the plurality of candidate tracks and each of the plurality of tracks for the band to which the candidate track corresponds by use of a Fast Fourier-transform fingerprint algorithm; and using the maximum similarity index calculated for each of the plurality of tracks in the preceeding step to determine if the candidate finger and the BFST match. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
-
-
55. A method for authenticating an individual by use of fingerprint data, comprising:
-
obtaining a biometrics fingerprint signature template (“
BFST”
) for the individual in an enrollment process by the following steps;selecting a first and a second band for the BFST; obtaining a first plurality of tracks for the first band and a second plurality of tracks for the second band by use of an enrollment frame of a selected finger of the individual, wherein the first and second bands are spatially referenced to the enrollment frame and can be spatially referenced to a reference barrier and two or more fiducial marks are used for calibration in obtaining the enrollment frame; and determining whether there is a match between a candidate finger and the BFST in an authentication process by the following steps; selecting a swipe direction and an access code for the individual; obtaining a first and a second candidate track from the candidate finger through use of the reference barrier in an authentication unit so that the first candidate track is spatially referenced so as to be within the first band and the second candidate track is spatially referenced so as to be within the second band; calculating a first authentication similarity index from the first candidate track and the first plurality of tracks by use of a Fast Fourier-transform fingerprint algorithm; calculating a second authentication similarity index from the second candidate track and the second plurality of tracks by use of the Fast Fourier-transform fingerprint algorithm; and using the first authentication index and the second authentication index to determine if the candidate finger and the BFST match. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
-
-
72. An authentication process for authenticating an individual by use of fingerprint data from a selected finger of the individual, comprising the steps of:
-
(1) swiping the finger one or more times across a swipe surface of an authentication unit in accordance with preselected swipe limits to obtain a plurality of candidate linear signatures that are spatially referenced to a reference barrier so that each of the plurality of candidate linear signatures is spatially referenced so as to be within a corresponding band of a plurality of bands; (2) converting each of the plurality of linear signatures to a candidate track; (3) calculating an authentication similarity index for each candidate track and each of a plurality of tracks for its corresponding band from a selected biometrics fingerprint signature template (“
BFST”
) by use of a Fast Fourier-transform fingerprint algorithm;(4) calculating a match index by multiplying the maximum value obtained for the authentication similarity index for each candidate track; and (5) using the match index to determine whether the individual is authenticated for the selected BFST. - View Dependent Claims (73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84)
-
Specification