BIOMETRIC IDENTIFICATION AND VERIFICATION

• US 20110311110A1
• Filed: 10/18/2010
• Published: 12/22/2011
• Est. Priority Date: 04/25/2008
• Status: Active Grant

• Current Assignee: Aware Incorporated (Crowley Holdings Preferred LLC)
• Original Assignee: Aware Incorporated (Crowley Holdings Preferred LLC)
• Inventors: BENINI, David
• Granted Patent: US 8,553,947 B2
• Time in Patent Office: Days
• US Class Current: 382/115
• CPC Class Codes: G06F 16/24578 using ranking
• 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 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06V 10/764 using classification, e.g. of video objects
• CPC Class Codes: G06V 40/10 Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: G06V 40/172 Classification, e.g. identification
• CPC Class Codes: G06V 40/40 Spoof detection, e.g. liveness detection
• CPC Class Codes: G06V 40/70 Multimodal biometrics, e.g. combining information from different biometric modalities

Abstract

In real biometric systems, false match rates and false non-match rates of 0% do not exist. There is always some probability that a purported match is false, and that a genuine match is not identified. The performance of biometric systems is often expressed in part in terms of their false match rate and false non-match rate, with the equal error rate being when the two are equal. There is a tradeoff between the FMR and FNMR in biometric systems which can be adjusted by changing a matching threshold. This matching threshold can be automatically, dynamically and/or user adjusted so that a biometric system of interest can achieve a desired FMR and FNMR.

Claims

1-2. -2. (canceled)

9. A method of using impostor match behavior of biometric gallery samples to add a false match probability score to a match score to assist with match/no match decisions comprising:

determining a first match score between a biometric probe sample and a gallery sample;

determining a plurality of gallery match scores between the gallery sample and a plurality of other samples;

determining a number of the plurality of gallery match scores that are greater than the determined first match score;

determining a plurality of probe match scores between the probe sample and the plurality of other samples; and

determining a number of the plurality of probe match scores that are greater than the determined first match score.

10-13. -13. (canceled)

14. A method of using impostor match behavior of biometric gallery samples to add a false match probability score to a match score to assist with match/no match decisions when there is a multi-sample probe comprising:

determining a first match score between a first probe sample and a first gallery sample;

determining a plurality of gallery match scores between the first gallery sample and a plurality of other samples;

determining a number of the plurality of gallery match scores that are greater than the determined first match score;

determining a plurality of probe match scores between the first probe sample and the plurality of other samples;

determining a number of the plurality of probe match scores that are greater than the determined first match score;

determining a second match score of a second probe sample and a second gallery sample;

determining a plurality of gallery match scores between the second gallery sample and the plurality of other samples;

determining a number of the plurality of gallery match scores that are greater than the determined second match score;

determining a plurality of probe match scores between the second probe sample and the plurality of other samples;

determining a number of the plurality of probe match scores that are greater than the determined second match score; and

combining the determined information from the first and second sample to determine a false match probability level.

15-16. -16. (canceled)

17. A method of using impostor match behavior of biometric gallery samples to add a false match probability score to a match score to assist with match/no match decisions in a multi-modal environment comprising:

determining a first match score of a first probe sample corresponding to a mode and a first gallery sample;

determining a plurality of gallery match scores between the first gallery sample and a plurality of other samples;

determining a number of the plurality of gallery match scores that are greater than the determined first match score;

determining a plurality of probe match scores between the first probe sample and a plurality of other samples;

determining a number of the plurality of probe match scores that are greater than the determined first match score;

determining a second match score of a second probe sample corresponding to a second mode and a second gallery sample;

determining a plurality of gallery match scores between the second gallery sample and a plurality of other samples;

determining a number of the plurality of gallery match scores that are greater than the determined second match score;

determining a plurality of probe match scores between the second probe sample and a plurality of other samples;

determining a number of the plurality of probe match scores that are greater than the determined second match score; and

combining the determined information from the first and second samples to determine a false match probability level.

18-39. -39. (canceled)

40. A system of using impostor match behavior of biometric gallery samples to add a false match probability score to a match score to assist with match/no match decisions comprising:

a match score module that;

determines a first match score between a biometric probe sample and a gallery sample;

determines a plurality of gallery match scores between the gallery sample and a plurality of other samples;

determines a number of the plurality of gallery match scores that are greater than the determined first match score;

determines a plurality of probe match scores between the probe sample and the plurality of other samples; and

determines a number of the plurality of probe match scores that are greater than the determined first match score.

41-44. -44. (canceled)

45. A system of using impostor match behavior of biometric gallery samples to add a false match probability score to a match score to assist with match/no match decisions when there is a multi-sample probe comprising:

a match score module that;

determines a first match score between a first probe sample and a first gallery sample;

determines a plurality of gallery match scores between the first gallery sample and a plurality of other samples;

determines a number of the plurality of gallery match scores that are greater than the determined first match score;

determines a plurality of probe match scores between the first probe sample and the plurality of other samples;

determines a number of the plurality of probe match scores that are greater than the determined first match score;

determines a second match score of a second probe sample and a second gallery sample;

determines a plurality of gallery match scores between the second gallery sample and the plurality of other samples;

determines a number of the plurality of gallery match scores that are greater than the determined second match score;

determines a plurality of probe match scores between the second probe sample and the plurality of other samples;

determines a number of the plurality of probe match scores that are greater than the determined second match score; and

combines the determined information from the first and second sample to determine a false match probability level.

46-47. -47. (canceled)

48. A system of using impostor match behavior of biometric gallery samples to add a false match probability score to a match score to assist with match/no match decisions in a multi-modal environment comprising:

a match score module that;

determines a first match score of a first probe sample corresponding to a mode and a first gallery sample;

determines a plurality of gallery match scores between the first gallery sample and a plurality of other samples;

determines a number of the plurality of gallery match scores that are greater than the determined first match score;

determines a plurality of probe match scores between the first probe sample and a plurality of other samples;

determines a number of the plurality of probe match scores that are greater than the determined first match score;

determines a second match score of a second probe sample corresponding to a second mode and a second gallery sample;

determines a plurality of gallery match scores between the second gallery sample and a plurality of other samples;

determines a number of the plurality of gallery match scores that are greater than the determined second match score;

determines a plurality of probe match scores between the second probe sample and a plurality of other samples;

determines a number of the plurality of probe match scores that are greater than the determined second match score; and

combines the determined information from the first and second samples to determine a false match probability level.

49-60. -60. (canceled)