METHOD AND APPARATUS TO RELATE BIOMETRIC SAMPLES TO TARGET FAR AND FRR WITH PREDETERMINED CONFIDENCE LEVELS
First Claim
Patent Images
1. A method comprising:
- collecting a plurality of biometric measurements of a person;
computing a statistical measure based on the plurality of biometric measurements;
while the statistical measure is less than a target value, collecting a supplemental biometric measurement of the person and updating the statistical measure based on the supplemental biometric measurement;
storing a biometric template constructed from the plurality of biometric measurements and any supplemental biometric measurements;
computing an estimate of a discriminative power associated with a certain confidence of a biometric identification system based on the plurality of biometric measurements and any supplemental biometric measurements;
calculating a number of supplemental measurements likely to be required to achieve target values for false rejection rate (FRR) and false acceptance rate (FAR); and
calculating a number of supplemental measurements likely to be required to achieve target values for a certain confidence level.
0 Assignments
0 Petitions
Accused Products
Abstract
At least two biometric measurements of a person are collected, then a statistical measure based on the measurements is computed. The statistical measure is abounded estimate of the discriminative power of a test based on the measurements. While the discriminative power is less than a target value, additional biometric measurements are collected. When enough measurements have been collected, a biometric template is constructed from the measurements and stored for use in future identifications. Systems and software to implement similar methods are also described and claimed.
32 Citations
20 Claims
-
1. A method comprising:
-
collecting a plurality of biometric measurements of a person; computing a statistical measure based on the plurality of biometric measurements; while the statistical measure is less than a target value, collecting a supplemental biometric measurement of the person and updating the statistical measure based on the supplemental biometric measurement; storing a biometric template constructed from the plurality of biometric measurements and any supplemental biometric measurements; computing an estimate of a discriminative power associated with a certain confidence of a biometric identification system based on the plurality of biometric measurements and any supplemental biometric measurements; calculating a number of supplemental measurements likely to be required to achieve target values for false rejection rate (FRR) and false acceptance rate (FAR); and calculating a number of supplemental measurements likely to be required to achieve target values for a certain confidence level. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method comprising:
-
collecting a plurality of biometric measurements of a person; computing a statistical measure based on the plurality of biometric measurements; while the statistical measure is less than a target value, collecting a supplemental biometric measurement of the person and updating the statistical measure based on the supplemental biometric measurement; storing a biometric template constructed from the plurality of biometric measurements and any supplemental biometric measurements; computing an estimate of a discriminative power associated with a certain confidence of a biometric identification system based on the plurality of biometric measurements and any supplemental biometric measurements, wherein each biometric measurement comprises a plurality of keystroke timing measurements collected while the person types a test string on a keyboard. - View Dependent Claims (9)
-
-
10. A non-transitory computer-readable medium containing instructions to cause a programmable processor to perforin operations comprising:
-
collecting a plurality of measurements of a characteristic of a user, each measurement including a plurality of scalar quantities; adjusting the plurality of measurements to produce standard normal variables; computing an estimate of a number of measurements required to achieve a target discriminative power associated with a certain confidence for a test, for a plurality of different numbers of elements that the measurements are related to; while a number of the plurality of measurements is less than the estimated number of measurements for all of the numbers of elements, collecting a supplemental measurement of the user and computing a new estimate of a number of measurements required to achieve the target discriminative power of the test based on the standard normal variables and the supplemental measurement wherein the characteristic of the user is a typing rhythm of the user collected while the person types a test string on a keyboard. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A system comprising:
-
an input device to measure a characteristic of an enrolling user; biometric sample collection logic to collect a plurality of measurements from the input device; statistical analysis logic to compute a bounded estimate of a biometric identification capability based on the plurality of measurements; control logic to cause the biometric sample collection logic to collect a supplemental measurement until the bounded estimate reaches a target value; and
the control logic to compute an estimate of a discriminative power associated with a certain confidence of a biometric identification system based on the plurality of biometric measurements and any supplemental biometric measurements;wherein the number of supplemental measurements likely to be required to achieve target values for FRR and FAR is a plurality of supplemental measurements; and
where the number of supplemental measurements likely to be required to achieve target values for a certain confidence level is a plurality of supplemental measurements. - View Dependent Claims (16, 17, 18)
-
-
19. A method comprising:
-
collecting a plurality of biometric measurements of a person; computing a statistical measure based on the plurality of biometric measurements; while the statistical measure is less than a target value, collecting a supplemental biometric measurement of the person and updating the statistical measure based on the supplemental biometric measurement; storing a biometric template constructed from the plurality of biometric measurements and any supplemental biometric measurements; computing an estimate of a discriminative power associated with a certain confidence of a biometric identification system based on the plurality of biometric measurements and any supplemental biometric measurements; calculating a number of supplemental measurements likely to be required to achieve target values for FRR and FAR, wherein the number of supplemental measurements is a plurality of supplemental measurements; and
where the number of supplemental measurements likely to be required to achieve target values for a certain confidence level is a plurality of supplemental measurements. - View Dependent Claims (20)
-
Specification