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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Accused Products
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
21 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; and 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. - View Dependent Claims (15, 16)
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17. 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 imaging means for collecting 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 for collecting 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 (18, 19, 20, 21)
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Specification