Fingerprint identification method and system, and biometrics identification system

• US 7,174,036 B2
• Filed: 11/26/2002
• Issued: 02/06/2007
• Est. Priority Date: 11/26/2001
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ohba, Akitomo
• Primary Examiner(s): Mancuso, Joseph
• Assistant Examiner(s): CONOVER, DAMON M
• Application Number:
  US10/303,843
• Publication Number:
  US 20030099381A1
• Time in Patent Office: 1,533 Days
• Field of Search: 382/124, 382/125
• US Class Current: 382/124
• CPC Class Codes: G06F 18/2415 based on parametric or probabilistic models, e.g. based on likelihood ratio or false acceptance rate versus a false rejection rate
• CPC Class Codes: G06F 18/254 of classification results, e.g. of results related to same input data
• CPC Class Codes: G06V 10/764 using classification, e.g. of video objects
• CPC Class Codes: G06V 10/809 of classification results, e.g. where the classifiers operate on the same input data
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: G07C 9/37 using biometric data, e.g. fingerprints, iris scans or voice recognition

Abstract

A highly accurate identification system is built by using an identification module, which has predetermined values of FAR and FRR. A plurality of (m) biometrics are registered and managed. At the time of identification, a collation process is executed by using the m biometrics, and also a collation process is executed a plurality of (n) times with each biometrics. An identification result of the system is judged and outputted by combining the results of the m-biometrics collation and n-time collation trials. As conditions of judgment, when the collation is judged to be successful even once in the n-time collation trial, the collation is judged to be successful with respect to that biometrics. In the in-biometrics collation trial, when the collation is judged to be successful with respect to all the m biometrics, a judgment of identification success is given in the system as a whole.

Claims

1. A fingerprint identification method of making fingerprint identification based on fingerprint collation with individual fingerprint collation trial values of FARx and FRRx, the method comprising:

a registering step of registering fingerprint patterns of a plurality of (i.e., m) fingers of a person to be identified by the method;

an m-finger collation step of executing, at the time of identification, an individual fingerprint collation trial for each of the plurality of m fingers;

an n-time collation step of executing the individual fingerprint collation trial a plurality of (i.e., n) times for each of the plurality of m fingers; and

an identifying step of judging and outputting the identification result by combining the results of the m-finger collation and n-time collation steps, wherein, in the n-time collation step, when the individual collation trial is judged to be successful even once in the n individual collation trials, the collation is judged to be successful with respect to that finger, and in the m-finger collation step, when the collation is judged to be successful with respect to all the m fingers, a judgment of identification success (acceptance) is given; and

a defining step of defining values of FAR and FRR for the identification result by setting values of FARx, FRRx, m and n prior to executing the method,

wherein the FAR for the identification result is defined as FAR(m, n)=n^m·

FARx^m (FARx <

<

1).

2. A fingerprint identification method of making fingerprint identification based on fingerprint collation with individual fingerprint collation trial values of FARx and FRRx, the method comprising:

a registering step of registering fingerprint patterns of a plurality of (i.e., m) fingers of a person to be identified by the method;

an m-finger collation step of executing, at the time of identification, an individual fingerprint collation trial for each of the plurality of m fingers;

an n-time collation step of executing the individual fingerprint collation trial a plurality of (i.e., n) times for each of the plurality of m fingers; and

an identifying step of judging and outputting the identification result by combining the results of the m-finger collation and n-time collation steps, wherein, in the n-time collation step, when the individual collation trial is judged to be successful even once in the n individual collation trials, the collation is judged to be successful with respect to that finger, and in the m-finger collation step, when the collation is judged to be successful with respect to all the m fingers, a judgment of identification success (acceptance) is given; and

a defining step of defining values of FAR and FRR for the identification result by setting values of FARx, FRRx, m and n prior to executing the method,

wherein the FRR for the identification result is defined as FRR(m, n)=m·

FRRxⁿ (FRRx <

<

1).

3. A fingerprint identification system comprising:

a fingerprint identification module including a fingerprint registering means for registering and managing fingerprint patterns, a fingerprint sensor means for reading out fingerprints and detecting fingerprint patterns, and a fingerprint collation means for executing a collation process on the basis of a predetermined algorithm by comparing the fingerprint patterns detected by the fingerprint sensor means with the fingerprint patterns registered in the fingerprint registering means, the fingerprint identification module having individual fingerprint collation trial values of FARx and FRRx,

wherein;

the fingerprint registering means registers and manages user'"'"'s fingerprint patterns of a plurality of (i.e., m) fingers; and

at the time of identification, the fingerprint sensor means and the fingerprint collation means are rendered operative to input, for the collation process, fingerprint patterns of the plurality of (i.e., m) fingers and also of each finger a plurality of (i.e., n) times, and the results of the collation processes are combined to judge and output the identification result, wherein when an individual collation trial is judged to be successful even once in the n individual collation trials for a respective finger, the collation is judged to be successful with respect to that finger, and when the collation is judged to be successful with respect to all the m fingers, a judgment of identification success (acceptance) is given, and

wherein values of FAR and FRR for the identification result are defined in said fingerprint collation means by setting values of FARx, FRRx, m and n,

wherein the FAR for the identification result is defined as FAR(m, n)=n^m·

FARx^m (FARx <

<

1).

4. A fingerprint identification system comprising:

a fingerprint identification module including a fingerprint registering means for registering and managing fingerprint patterns, a fingerprint sensor means for reading out fingerprints and detecting fingerprint patterns, and a fingerprint collation means for executing a collation process on the basis of a predetermined algorithm by comparing the fingerprint patterns detected by the fingerprint sensor means with the fingerprint patterns registered in the fingerprint registering means, the fingerprint identification module having individual fingerprint collation trial values of FARx and FRRx,

wherein;

the fingerprint registering means registers and manages user'"'"'s fingerprint patterns of a plurality of (i.e., m) fingers; and

at the time of identification, the fingerprint sensor means and the fingerprint collation means are rendered operative to input, for the collation process, fingerprint patterns of the plurality of (i.e., m) fingers and also of each finger a plurality of (i.e., n) times, and the results of the collation processes are combined to judge and output the identification result, wherein when an individual collation trial is judged to be successful even once in the n individual collation trials for a respective finger, the collation is judged to be successful with respect to that finger, and when the collation is judged to be successful with respect to all the m fingers, a judgment of identification success (acceptance) is given, and

wherein values of FAR and FRR for the identification result are defined in said fingerprint collation means by setting values of FARx, FRRx, m and n,

wherein the FRR for the identification result is defined as FRR(m, n)=m·

FRRxⁿ (FRRx<

<

1).

5. A biometrics identification system comprising:

an identification module including a registering means for registering and managing biometrics, a sensor means for reading out and detecting biometrics, and a collation means for executing a collation process on the basis of a predetermined algorithm by comparing biometrics detected by the sensor means with the biometrics registered in the registering means, the identification module having individual biometric collation trial values of FARx and FRRx,

wherein;

the registering means registers and manages a plurality of (i.e., m) patterns of user'"'"'s biometrics; and

at the time of identification, the sensor means and the collation means are rendered operative to input, for the collation process, a plurality of (i.e., n) times for each of the plurality of (i.e., m) biometrics, and the identification result is judged and outputted by combining the results of the collation processes, wherein when an individual collation trial is judged to be successful even once in the n individual collation trials for a respective biometric, the collation is judged to be successful with respect to that biometric, and when the collation is judged to be successful with respect to all the m biometrics, a judgment of identification success (acceptance) is given, and

wherein values of FAR and FRR for the identification result are defined in said identification module by setting values of FARx, FRRx, m and n,

wherein the FAR for the identification result is defined as FAR(m, n)=n^m·

FARx^m (FARx <

<

1).

6. A biometrics identification system comprising:

an identification module including a registering means for registering and managing biometrics, a sensor means for reading out and detecting biometrics, and a collation means for executing a collation process on the basis of a predetermined algorithm by comparing biometrics detected by the sensor means with the biometrics registered in the registering means, the identification module having individual biometric collation trial values of FARx and FRRx,

wherein;

the registering means registers and manages a plurality of (i.e., m) patterns of user'"'"'s biometrics; and

at the time of identification, the sensor means and the collation means are rendered operative to input, for the collation process, a plurality of (i.e., n) times for each of the plurality of (i.e., m) biometrics, and the identification result is judged and outputted by combining the results of the collation processes, wherein when an individual collation trial is judged to be successful even once in the n individual collation trials for a respective biometric, the collation is judged to be successful with respect to that biometric, and when the collation is judged to be successful with respect to all the m biometrics, a judgment of identification success (acceptance) is given, and

wherein values of FAR and FRR for the identification result are defined in said identification module by setting values of FARx, FRRx, m and n,

wherein the FRR for the identification result is defined as FRR(m, n)=m·

FRRxⁿ (FRRx <

<

1).