Long distance multimodal biometric system and method
First Claim
1. A multimodal biometric identification system, comprising:
- a first imaging system that detects one or more subjects in a first field of view, the one or more subjects including a targeted subject having a first biometric characteristic including a face and a second biometric characteristic including at least one iris corresponding to an eye of the targeted subject, wherein the first imaging system only receives passive illumination photons reflected from the one or more subjects to detect the first biometric characteristic, the passive illumination photons being generated by a source external to the multimodal biometric identification system and having at least one of a visible wavelength, a near-infrared wavelength, and an infrared wavelength;
a second imaging system that captures a first image of the first biometric characteristic according to first photons reflecting from the first biometric characteristic, the first biometric characteristic being positioned in a second field of view which is smaller than the first field of view, and the first image including first data for biometric identification;
a third imaging system that captures a second image of the second biometric characteristic according to second photons reflecting from the second biometric characteristic, the second biometric characteristic being positioned in a third field of view which is smaller than the first and second fields of view, and the second image including second data for biometric identification;
at least one active illumination source that emits the second photons to be reflected from the second biometric characteristic, the at least one active illumination source further configured to reduce, via a filter, visible illumination from the at least one active illumination source; and
a controller that operates the first imaging system, the second imaging system, the third imaging system, and the at least one illumination source according to programmed instructions, the controller comprising at least one of;
one or more independent sub-controllers and one or more interdependent sub-controllers wherein the controller does not control the source external to the multimodal biometric identification system, the controller being configured to receive the first and second data for biometric identification and to biometrically identify the targeted subject by processing both the first and second data in combination, wherein the controller is further configured to align the second field of view according to the first biometric characteristic.
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Abstract
A system for multimodal biometric identification has a first imaging system that detects one or more subjects in a first field of view, including a targeted subject having a first biometric characteristic and a second biometric characteristic; a second imaging system that captures a first image of the first biometric characteristic according to first photons, where the first biometric characteristic is positioned in a second field of view smaller than the first field of view, and the first image includes first data for biometric identification; a third imaging system that captures a second image of the second biometric characteristic according to second photons, where the second biometric characteristic is positioned in a third field of view which is smaller than the first and second fields of view, and the second image includes second data for biometric identification. At least one active illumination source emits the second photons.
81 Citations
27 Claims
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1. A multimodal biometric identification system, comprising:
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a first imaging system that detects one or more subjects in a first field of view, the one or more subjects including a targeted subject having a first biometric characteristic including a face and a second biometric characteristic including at least one iris corresponding to an eye of the targeted subject, wherein the first imaging system only receives passive illumination photons reflected from the one or more subjects to detect the first biometric characteristic, the passive illumination photons being generated by a source external to the multimodal biometric identification system and having at least one of a visible wavelength, a near-infrared wavelength, and an infrared wavelength; a second imaging system that captures a first image of the first biometric characteristic according to first photons reflecting from the first biometric characteristic, the first biometric characteristic being positioned in a second field of view which is smaller than the first field of view, and the first image including first data for biometric identification; a third imaging system that captures a second image of the second biometric characteristic according to second photons reflecting from the second biometric characteristic, the second biometric characteristic being positioned in a third field of view which is smaller than the first and second fields of view, and the second image including second data for biometric identification; at least one active illumination source that emits the second photons to be reflected from the second biometric characteristic, the at least one active illumination source further configured to reduce, via a filter, visible illumination from the at least one active illumination source; and a controller that operates the first imaging system, the second imaging system, the third imaging system, and the at least one illumination source according to programmed instructions, the controller comprising at least one of;
one or more independent sub-controllers and one or more interdependent sub-controllers wherein the controller does not control the source external to the multimodal biometric identification system, the controller being configured to receive the first and second data for biometric identification and to biometrically identify the targeted subject by processing both the first and second data in combination, wherein the controller is further configured to align the second field of view according to the first biometric characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for a multimodal biometric identification system, the method comprising the steps of:
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identifying one or more subjects in a first field of view; selecting a targeted subject from the one or more subjects, the targeted subject having a first biometric characteristic including a face and a second biometric characteristic including at least one iris corresponding to an eye of the targeted subject; aligning, with a controller associated with the multimodal biometric identification system, a second field of view according to the first biometric characteristic, the second field of view being smaller than the first field of view; aligning, with the controller, a third field of view according to the second biometric characteristic, the third field of view being smaller than the first field of view and the second field of view; actively illuminating with second photons the second biometric characteristic, the second photons being filtered with a filter to reduce visible illumination; receiving, by a first imaging system, only passive illumination photons reflected from the one or more subjects to detect the first biometric characteristic, the passive illumination photons being generated by an ambient source not controlled by the controller and having at least one of a visible wavelength, a near-infrared wavelength, and an infrared wavelength; capturing, with a second imaging system, a first image of the first biometric characteristic according to first photons, the first image including first data for biometric identification; capturing, with a third imaging system, a second image of the second biometric characteristic according to the second photons, the second image including second data for biometric identification; receiving the first and second data for biometric identification by the controller; and biometrically identifying the targeted subject by processing both the first and second data in combination by the controller. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A multimodal biometric identification system comprising:
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a first imaging system that detects one or more subjects in a first field of view, the one or more subjects including a targeted subject having a first biometric characteristic including a face and a second biometric characteristic including at least one iris corresponding to an eye of the targeted subject, wherein the first imaging system only receives passive illumination photons reflected from the one or more subjects to detect the first biometric characteristic, the passive illumination photons being generated by a source external to the multimodal biometric identification system and having at least one of a visible wavelength, a near-infrared wavelength, and an infrared wavelength; a second imaging system that captures a first image of the first biometric characteristic according to first photons reflecting from the first biometric characteristic, the first biometric characteristic being positioned in a second field of view which is smaller than the first field of view, and the first image including first data for biometric identification; a third imaging system that captures a second image of the second biometric characteristic according to second photons reflecting from the second biometric characteristic, the second biometric characteristic being positioned in a third field of view which is smaller than the first and second fields of view, and the second image including second data for biometric identification, the third imaging system including; a hyperbolic Cassegrain telescope with a zooming telescope lens having an aperture of approximately fifty centimeters to approximately one-hundred centimeters for providing a resolution of the second image of approximately two line pairs per millimeter to approximately four line pairs per millimeter, and a pan-tilt unit having at least two high precision axis encoders with resolutions less than approximately two milliarcseconds for aligning the hyperbolic Cassegrain telescope with the third field of view; at least one active illumination source that emits the second photons to be reflected from the second biometric characteristic, the at least one active illumination source including; an optical fiber for directing a beam of illumination including the second photons from the at least one active illumination source, a rotating diffuser configured to rotate at approximately one-thousand rotations per minute for reducing speckle of the directed beam of illumination, a notch filter configured to reduce visible illumination of the directed beam of illumination, and a Fresnel lens for collimating the beam of illumination; and a controller that operates the first imaging system, the second imaging system, the third imaging system, and the at least one illumination source according to programmed instructions, the controller comprising at least one of;
one or more independent sub-controllers and one or more interdependent sub-controllers, wherein the controller does not control the source external to the multimodal biometric identification system, the controller being configured to receive the first and second data for biometric identification and to biometrically identify the targeted subject by processing both the first and second data in combination, wherein the controller is further configured to align the second field of view according to the first biometric characteristic.
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Specification