Claims
- 1. A method of identifying a subject, comprising the steps of:
(a) comparing a first and a second set of biometric parameters extracted from a biometric measurement selected from the group consisting of a heart rate variability measurement and a respiration pattern measurement, wherein
(1) the first set of biometric parameters is associated with a first subject, and (2) the second set of biometric parameters is associated with a second subject; and (b) identifying the first subject as the second subject if the first set and second set correlate, and identifying the first subject as different from the second subject if the first and second sets do not correlate.
- 2. The method of claim 1 further comprising the step of analyzing the biometric measurement of the first subject to extract the first set of biometric parameters.
- 3. The method of claim 2 further comprising the step of acquiring the biometric measurement from the first subject.
- 4. The method of claim 1 wherein the first set of biometric parameters is compared to a plurality of second sets of biometric parameters, wherein individual members of the plurality are each associated with a different, third subject.
- 5. A method of compiling a database comprising sets of biometric parameters each associated with an individual subject, comprising the steps of:
(a) acquiring a biometric measurement from a plurality of individual subjects, wherein the biometric measurement is selected from the group consisting of a heart rate variability measurement and a respiration pattern measurement; (b) analyzing the biometric measurements to extract sets of biometric parameters, wherein each set of biometric parameters is associated with an individual subject; and (c) compiling the sets of biometric parameters into a database, wherein individual sets of biometric parameters are each correlated with the individual subjects from which the biometric measurements were obtained.
- 6. A method for identifying a subject according to a periodic physiological process of the subject, the method comprising the steps of:
measuring the periodic physiological process for a period of time to generate biometric data, the period of time being sufficient such that the biometric data contains data corresponding to a plurality of cycles of the physiological process; extracting a plurality of the cycles of the biometric data; and estimating a first plurality of coefficients based on the plurality of cycles.
- 7. The method of claim 6, further including the step of determining a periodicity of the biometric data.
- 8. The method of claim 6, further including the step of normalizing the plurality of cycles, the step of estimating including estimating the plurality of coefficients based on the plurality of normalized cycles.
- 9. The method of claim 6, wherein the periodic physiological process is a heartbeat or pulse.
- 10. The method of claim 6, wherein the periodic physiological process is respiration.
- 11. The method of claim 6, wherein the step of estimating includes regressing the cycles on a polynomial function over time.
- 12. The method of claim 6, further including the step of comparing the first plurality of coefficients with a second plurality of coefficients.
- 13. A method for identifying a subject according to heart activity of the subject, the method comprising the steps of:
measuring the heart activity to generate heart activity data; and identifying the subject according to the heart activity data.
- 14. The method of claim 13, further including the step of identifying at least one feature of the heart activity data the method of identifying including indentifying the subject according to the at least one feature.
- 15. The method of claim 13, wherein the step of measuring includes measuring the heart activity over a period of time sufficient so as to include a plurality of heartbeats, the method further including the step of aligning heart activity data corresponding to each of the plurality of heartbeats.
- 16. The method of claim 13, further including the step of applying a lowpass filter to the heart activity data.
- 17. The method of claim 13, wherein the lowpass filter is a 40 Hz lowpass filter.
- 18. A method for identifying a subject according to respiration of the subject, the method comprising the steps of:
measuring the respiration to generate respiration data; and identifying the subject based on the respiration data.
- 19. The method of claim 18, wherein the step of measuring includes measuring the respiration using a standoff measuring technique.
- 20. The method of claim 18, wherein the step of measuring includes measuring a temperature change associated with inhalation and exhalation of the subject.
- 21. A method for identifying a subject according to at least one of a cardiac and a respiratory physiological process of the subject, the method comprising the steps of:
measuring the physiological process to generate biometric data; estimating a coefficient from the biometric data; and identifying the subject according to the coefficient.
- 22. An apparatus for identifying a subject according to at least one of a cardiac and a respiratory physiological process of the subject, the apparatus comprising:
means for measuring the physiological process to generate biometric data; and means for identifying the subject according to the biometric data.
Parent Case Info
[0001] This application claims the benefit of and incorporates by reference co-pending provisional application Ser. No. 60/300,070 filed Jun. 25, 2001.
Provisional Applications (1)
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Number |
Date |
Country |
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60300070 |
Jun 2001 |
US |