Systems and methods of biometric analysis with a spectral discriminator
First Claim
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1. A biometric analysis system, comprising:
- an illumination source configured to illuminate an iris of a subject;
a spectral discriminator including a first optical filter having first set of pass characteristics and a second optical filter having second set of pass characteristics, the spectral discriminator configured to selectively receive light scattered from the iris through the first optical filter and the second optical filter;
a camera configured to capture one or more images of the subject during passage of the light scattered from the iris through the first optical filter, and configured to capture one or more images of the subject during passage of the light scattered from the iris through the second optical filter; and
means for receiving as input the captured one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter, and determining whether a match exists between iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the first optical filter and iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the second optical filter, existence of the match being indicative of a facsimile image.
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Abstract
Exemplary embodiments are directed to biometric analysis systems generally including one or more illumination sources, a camera, and an analysis module. The illumination sources are configured to illuminate at least a portion of a face of a subject. The camera is configured to capture one or more images of the subject during illumination of the face of the subject. The analysis module is configured to analyze the one or more images captured by the camera to determine an indication of liveliness of the subject and prevent spoofing.
230 Citations
22 Claims
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1. A biometric analysis system, comprising:
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an illumination source configured to illuminate an iris of a subject; a spectral discriminator including a first optical filter having first set of pass characteristics and a second optical filter having second set of pass characteristics, the spectral discriminator configured to selectively receive light scattered from the iris through the first optical filter and the second optical filter; a camera configured to capture one or more images of the subject during passage of the light scattered from the iris through the first optical filter, and configured to capture one or more images of the subject during passage of the light scattered from the iris through the second optical filter; and means for receiving as input the captured one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter, and determining whether a match exists between iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the first optical filter and iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the second optical filter, existence of the match being indicative of a facsimile image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 21, 22)
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18. A method of biometric analysis, comprising:
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illuminating an iris of a subject with an illumination source of a biometric analysis system; selectively receiving light scattered from the iris through a first optical filter and a second optical filter of a spectral discriminator of the biometric analysis system, the first optical filter having first set of pass characteristics and the second optical filter having second set of pass characteristics; capturing one or more images of the subject with a camera of the biometric analysis system during passage of the light scattered from the iris through the first optical filter; capturing one or more images of the subject with the camera of the biometric analysis system during passage of the light scattered from the iris through the second optical filter; receiving as input at an analysis module of the biometric analysis system the captured one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter; and determining with the analysis module of the biometric analysis system whether a match exists between iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the first optical filter and iris structural information displayed in the one or more imaged of the subject during passage of the light scattered from the iris through the second optical filter, existence of the match being indicative of a facsimile image. - View Dependent Claims (19)
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20. A non-transitory computer-readable medium storing instructions for biometric analysis that are executable by a processing device, wherein execution of the instructions by the processing device causes the processing device to:
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illuminate an iris of a subject with an illumination source of a biometric analysis system; selectively receive light scattered from the iris through a first optical filter and a second optical filter of a spectral discriminator of the biometric analysis system, the first optical filter having first set of pass characteristics and the second optical filter having second set of pass characteristics; capture one or more images of the subject with a camera of the biometric analysis system during passage of the light scattered from the iris through the first optical filter; capture one or more images of the subject with the camera of the biometric analysis system during passage of the light scattered from the iris through the second optical filter; receive as input at an analysis module of the biometric analysis system the captured one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter; and determine with the analysis module of the biometric analysis system whether a match exists between iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the first optical filter and iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the second optical filter, existence of the match being indicative of a facsimile image.
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Specification