Biometric object sensor and method
First Claim
Patent Images
1. A biometric image sensor comprising:
- a first light source having a first wavelength λ
1;
a second light source having a second wavelength λ
2;
a photodetector configured and positioned to receive light of the first wavelength λ
1 and light of the second wavelength λ
2 reflecting from a biometric object being imaged and to produce a first reflectivity output indicative of the amount of reflectance of the light of the first wavelength λ
1 and a second reflectivity output indicative of the amount of reflectance of the light of the second wavelength λ
2; and
a computing device configured to compare the difference between the first reflectivity output and the second reflectivity output with an authenticity threshold.
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Abstract
A biometric image sensor system and method is disclosed which may comprise a first light source having a first wavelength λ1, a second light source having a second wavelength λ2, a photodetector configured and positioned to receive light of the first wavelength λ1 and light of the second wavelength λ2 reflecting from a biometric object being imaged and to produce a first output indicative of the amount of reflectance of the light of the first wavelength λ1 and a second output indicative of the amount of reflectance of the light of the second wavelength λ2, and a computing device configured to compare the difference between the first output and the second output with an authenticity threshold.
453 Citations
28 Claims
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1. A biometric image sensor comprising:
-
a first light source having a first wavelength λ
1;a second light source having a second wavelength λ
2;a photodetector configured and positioned to receive light of the first wavelength λ
1 and light of the second wavelength λ
2 reflecting from a biometric object being imaged and to produce a first reflectivity output indicative of the amount of reflectance of the light of the first wavelength λ
1 and a second reflectivity output indicative of the amount of reflectance of the light of the second wavelength λ
2; anda computing device configured to compare the difference between the first reflectivity output and the second reflectivity output with an authenticity threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of sensing an image of a biometric object comprising:
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directing a first light source having a first wavelength λ
1 on the object;directing a second light source having a second wavelength λ
2 on the object;detecting the light of the first wavelength λ
1 and the light of the second wavelength λ
2 reflecting from the biometric object being imaged and producing a first reflectivity output indicative of the amount of reflectance of the light of the first wavelength λ
1 and a second reflectivity output indicative of the amount of reflectance of the light of the second wavelength λ
2; andcomparing, via a computing device, the difference between the first reflectivity output and the second reflectivity output with an authenticity threshold. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A non-transitory machine readable medium storing instructions that, when executed by a computing device, cause the computing device to perform a method, the method comprising:
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directing a first light source having a first wavelength λ
1 on a biometric object being imaged;directing a second light source having a second wavelength λ
2 on the biometric object being imaged;detecting the light of the first wavelength λ
1 and the light of the second wavelength λ
2 reflecting from the biometric object being imaged and producing a first reflectivity output indicative of the amount of reflectance of the light of the first wavelength λ
1 and a second reflectivity output indicative of the amount of reflectance of the light of the second wavelength λ
2; andcomparing the difference between the first reflectivity output and the second reflectivity output with an authenticity threshold.
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26. A biometric image sensor comprising:
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a light source configurable to emit a first wavelength λ
1 of light and a second wavelength λ
2 of light;a photodetector configurable and positionable to receive one or more electromagnetic radiation wavelengths reflected from a surface in response to the first wavelength λ
1 and the second wavelength λ
2 wherein the reflected electromagnetic radiation is reflecting from a biometric object being imaged to produce a first reflectivity output indicative of the amount of reflectance of the light of the first wavelength λ
1 and a second reflectivity output indicative of the amount of reflectance of the light of the second wavelength λ
2; anda computing device configured to compare the difference between the first reflectivity output and the second reflectivity output with an authenticity threshold.
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27. A method of sensing an image of a biometric object comprising:
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directing a first light source having a first wavelength λ
1 on the object;directing a second light source having a second wavelength λ
2 on the object;detecting one or more electromagnetic radiation wavelengths reflected from a surface in response to the first wavelength λ
1 and the second wavelength λ
2 wherein the reflected electromagnetic radiation is reflecting from a biometric object being imaged to produce a first reflectivity output indicative of the amount of reflectance of the light of the first wavelength λ
1 and a second reflectivity output indicative of the amount of reflectance of the light of the second wavelength λ
2, andcomparing, via a computing device, the difference between the first reflectivity output and the second reflectivity output with an authenticity threshold.
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28. A non-transitory machine readable medium storing instructions that, when executed by a computing device, cause the computing device to perform a method, the method comprising:
-
directing a first light source having a first wavelength λ
1 on a biometric object being imaged;directing a second light source having a second wavelength λ
2 on the biometric object being imaged;detecting one or more electromagnetic radiation wavelengths reflected from a surface in response to the first wavelength λ
1 and the second wavelength λ
2 wherein the reflected electromagnetic radiation is reflecting from a biometric object being imaged to produce a first reflectivity output indicative of the amount of reflectance of the light of the first wavelength λ
1 and a second reflectivity output indicative of the amount of reflectance of the light of the second wavelength λ
2, andcomparing the difference between the first reflectivity output and the second reflectivity output with an authenticity threshold.
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Specification
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Current AssigneeSynaptics Incorporated
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Original AssigneeSynaptics Incorporated
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InventorsErhart, Richard Alexander, Thompson, Erik Jonathon, Jandu, Jaswinder, Percy, Pamela
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Primary Examiner(s)Koziol, Stephen R
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Assistant Examiner(s)GILLIARD, DELOMIA L
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Application NumberUS13/763,377Publication NumberTime in Patent Office949 DaysField of Search382/115US Class Current1/1CPC Class CodesG06V 10/143 Sensing or illuminating at ...G06V 40/1312 direct reading, e.g. contac...G06V 40/40 Spoof detection, e.g. liven...H04N 23/611 where the recognised object...
