Compact biometric acquisition system and method
A method of determining the identity of a subject while the subject is walking or being transported in an essentially straight direction is disclosed, the two dimensional profile of the subject walking or being transported along forming a three dimensional swept volume, without requiring the subject to change direction to avoid any part of the system, comprising acquiring data related to one or more biometrics of the subject with the camera(s), processing the acquired biometrics data, and determining if the acquired biometric data match corresponding biometric data stored in the system, positioning camera(s) and strobed or scanned infrared illuminator(s) above, next to, or below the swept volume. A system for carrying out the method is also disclosed.
1. A system for acquisition of biometric data from a subject, the system comprising:
at least one light source configured to:
illuminate a subject with light pulses from a first spectrum and a second spectrum of a plurality of discrete light spectra, and
illuminate the subject with light pulses from the second spectrum of the plurality of discrete light spectra, the second spectrum different from the first spectrum;
a sensor configured to
acquire, at a first rate of acquisition, a set of iris data from the subject for biometric matching, using the light pulses from the first spectrum and the second spectrum, and
acquire at a second rate of acquisition that is lower than the first rate of acquisition and interleaved with the acquisitions at the first rate of acquisition, a set of biometric data from other than an eye or iris of the subject for liveness detection, using the light pulses from the second spectrum; and
at least one processor configured to perform biometric matching using data from the set of iris data, and liveness detection using the set of biometric data.
2. The system of claim 1 , wherein the sensor is further configured to acquire, at a third rate of acquisition interleaved with the acquisitions of the set of iris data and the set of biometric data, another set of biometric data from the subject, using light pulses from a third spectrum of the plurality of discrete light spectra.
3. The system of claim 1 , wherein the sensor is further configured to acquire some of the iris data from the subject while the subject is in motion.
4. The system of claim 1 , wherein each of the plurality of discrete light spectra comprises light of a single wavelength.
5. The system of claim 1 , wherein each of the light pulses from the first spectrum and the second spectrum is formed from a light pulse from the first spectrum and a light pulse from the second spectrum.
6. The system of claim 1 , wherein the sensor is configured to acquire the set of iris data with an image quality higher than that of the set of biometric data.
7. The system of claim 1 , further comprising at least one processor configured to detect a spectral signature consistent with skin or living tissue using the set of biometric data.
8. The system of claim 1 , wherein the sensor is configured to acquire the set of iris data using light from a spectrum wider than the second spectrum.
9. A method for acquisition of biometric data from a subject, the method comprising:
illuminating a subject with light pulses from a first spectrum and a second spectrum of a plurality of discrete light spectra;
acquiring, by a sensor at a first rate of acquisition, a set of iris data from the subject for biometric matching, using the light pulses from the first spectrum and the second spectrum;
illuminating the subject with light pulses from the second spectrum of the plurality of discrete light spectra, the second spectrum different from the first spectrum;
acquiring, by the sensor at a second rate of acquisition that is lower than the first rate of acquisition and interleaved with the acquisitions at the first rate of acquisition, a set of biometric data from other than an eye or iris of the subject for liveness detection, using the light pulses from the second spectrum; and
performing biometric matching using data from the set of iris data and liveness detection using the set of biometric data.
10. The method of claim 9 , further comprising acquiring, by the sensor at a third rate of acquisition interleaved with the acquisitions of the set of iris data and the set of biometric data, another set of biometric data from the subject, using light pulses from a third spectrum of the plurality of discrete light spectra.
11. The method of claim 9 , further comprising acquiring some of the iris data from the subject while the subject is in motion.
12. The method of claim 9 , wherein each of the plurality of discrete light spectra comprises light of a single wavelength.
13. The method of claim 9 , wherein each of the light pulses from the first spectrum and the second spectrum is formed from a light pulse from the first spectrum and a light pulse from the second spectrum.
14. The method of claim 9 , further comprising acquiring the set of iris data with an image quality higher than that of the set of biometric data.
15. The method of claim 9 , further comprising detecting a spectral signature consistent with skin or living tissue using the set of biometric data.
16. The method of claim 9 , wherein acquiring the set of iris data from the subject comprises acquiring the set of iris data using light from a spectrum wider than the second spectrum.