Biometric identification and verification
AssigneeAware, Inc.
InventorDavid Benini
Life of this patent
Estimating the term…
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.
Claims22
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, as the false match probability score, 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;
- determining a number of the plurality of probe match scores that are greater than the determined first match score;
- and
- using information from the above determining steps to assist with match/no match decisions.
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, as the false match probability score, 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 information from the first probe sample and the second probe sample to determine a false match probability level.
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, as the false match probability score, 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 information from the first probe sample and the second probe sample to determine a false match probability level.
A system that uses 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 and a processor configured to:
- determine a first match score between a biometric probe sample and a gallery sample;
- determine, as the false match probability score, a plurality of gallery match scores between the gallery sample and a plurality of other samples;
- determine a number of the plurality of gallery match scores that are greater than the determined first match score;
- determine a plurality of probe match scores between the probe sample and the plurality of other samples;
- determine a number of the plurality of probe match scores that are greater than the determined first match score;
- and
- using information from the above determining steps to assist with match/no match decisions.
A system that uses 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 and a processor configured to:
- determine a first match score between a first probe sample and a first gallery sample;
- determine, as the false match probability score, a plurality of gallery match scores between the first gallery sample and a plurality of other samples;
- determine a number of the plurality of gallery match scores that are greater than the determined first match score;
- determine a plurality of probe match scores between the first probe sample and the plurality of other samples;
- determine a number of the plurality of probe match scores that are greater than the determined first match score;
- determine a second match score of a second probe sample and a second gallery sample;
- determine a plurality of gallery match scores between the second gallery sample and the plurality of other samples;
- determine a number of the plurality of gallery match scores that are greater than the determined second match score;
- determine a plurality of probe match scores between the second probe sample and the plurality of other samples;
- determine a number of the plurality of probe match scores that are greater than the determined second match score;
- and
- combine information from the first probe sample and the second probe sample to determine a false match probability level.
A system that uses 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 and a processor configured to:
- determine a first match score of a first probe sample corresponding to a mode and a first gallery sample;
- determine, as the false match probability score, a plurality of gallery match scores between the first gallery sample and a plurality of other samples;
- determine a number of the plurality of gallery match scores that are greater than the determined first match score;
- determine a plurality of probe match scores between the first probe sample and a plurality of other samples;
- determine a number of the plurality of probe match scores that are greater than the determined first match score;
- determine a second match score of a second probe sample corresponding to a second mode and a second gallery sample;
- determine a plurality of gallery match scores between the second gallery sample and a plurality of other samples;
- determine a number of the plurality of gallery match scores that are greater than the determined second match score;
- determine a plurality of probe match scores between the second probe sample and a plurality of other samples;
- determine a number of the plurality of probe match scores that are greater than the determined second match score;
- and
- combine information from the first probe sample and the second probe sample to determine a false match probability level.
Dependencies are inferred from the claim text.