Two camera biometric imaging
First Claim
Patent Images
1. A biometric sensor comprising:
- a platen adapted for placement of a purported skin site by an individual;
an illumination source configured to direct light toward the skin site;
a first imager configured to collect light scattered from an interface of the platen and the purported skin site at an angle less than a platen-skin site critical angle, wherein the platen-skin site critical angle is defined by an interface of the platen with an external environment in the vicinity of the purported skin site; and
a second imager configured to collect light scattered from an interface of the platen and the purported skin site at an angle greater than a platen-skin site critical angle.
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Abstract
Methods and systems are provided for performing a biometric measurement on an individual. A purported skin site of the individual is illuminated under a plurality of distinct optical conditions during a single illumination session. Light scattered beneath a surface of the purported skin site is received separately for each of the plurality of distinct optical conditions. A multispectral image of the purported skin site is derived from the received light. A biometric function is performed with the derived multispectral image.
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Citations
18 Claims
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1. A biometric sensor comprising:
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a platen adapted for placement of a purported skin site by an individual; an illumination source configured to direct light toward the skin site; a first imager configured to collect light scattered from an interface of the platen and the purported skin site at an angle less than a platen-skin site critical angle, wherein the platen-skin site critical angle is defined by an interface of the platen with an external environment in the vicinity of the purported skin site; and a second imager configured to collect light scattered from an interface of the platen and the purported skin site at an angle greater than a platen-skin site critical angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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illuminating a purported skin site of an individual disposed relative to a platen; receiving light scattered from an interface of the platen and the purported skin site at an angle less than a platen-skin site critical angle, wherein the platen-skin site critical angle is defined by an interface of the platen with an external environment in the vicinity of the purported skin site using a first imager; receiving light scattered from an interface of the platen and the purported skin site at an angle greater than a platen-skin site critical angle using a second imager; deriving an image of the skin site from the light received at the first imager and second imager; and performing a biometric function from the images collected from the images. - View Dependent Claims (15)
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16. A biometric sensor comprising:
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a platen configured for placement of a skin site by an individual; illumination means for directing light toward the skin site; and
first imaging means for deriving an image of the skin site from light scattered from an interface of the platen and the purported skin site at an angle less than a platen-skin site critical angle; and
second image means for deriving an image of the skin site from light scattered from an interface of the platen and the purported skin site at an angle greater than a platen-skin site critical angle, wherein the platen-skin site critical angle is defined by an interface of the platen with an external environment in the vicinity of the purported skin site. - View Dependent Claims (17, 18)
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Specification