ANALYSIS OF REFLECTIONS OF PROJECTED LIGHT IN VARYING COLORS, BRIGHTNESS, PATTERNS, AND SEQUENCES FOR LIVENESS DETECTION IN BIOMETRIC SYSTEMS
First Claim
Patent Images
1. A method of determining face likeness, comprising:
- causing, with a processor of a mobile device, a likeness detection image to be displayed on a screen of the mobile device during a first period of time;
receiving, at the processor, a reflection image from a camera utilized by the face mobile device, the reflection image captured during the first period of time and showing a subject face;
analyzing, with the processor, the reflection image to identify any reflections of the likeness detection image in the reflection image; and
making, with the processor, a likeness determination based on the analysis.
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Abstract
Spoofed faces are unlikely to reflect a likeness detection image in the same manner as live faces. To determine likeness of a subject face, a likeness detection image is displayed on a screen of a face recognition device in the direction of the subject face, and a reflection image of the subject face is captured while the likeness detection image is displayed. The reflection image is analyzed to determine whether the reflection image contains any reflections of the likeness detection image, and a likeness determination is made based on the location and/or character of any such reflections.
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Citations
20 Claims
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1. A method of determining face likeness, comprising:
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causing, with a processor of a mobile device, a likeness detection image to be displayed on a screen of the mobile device during a first period of time; receiving, at the processor, a reflection image from a camera utilized by the face mobile device, the reflection image captured during the first period of time and showing a subject face; analyzing, with the processor, the reflection image to identify any reflections of the likeness detection image in the reflection image; and making, with the processor, a likeness determination based on the analysis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A face enrollment or face recognition device, comprising:
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a camera; a display screen; a processor; and a memory storing instructions for execution by the processor that, when executed by the processor, cause the processor to; cause a likeness detection image to be displayed on the display screen; cause the camera to capture a reflection image of a subject face while the likeness detection image is displayed on the display screen; analyze the reflection image to identify one or more reflections of the likeness detection image in the reflection image; and make a likeness determination based on the analysis. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method for determining whether a face is live or spoofed, comprising:
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projecting a likeness detection image onto a subject face during a first time period; capturing a reflection image of the subject face during the first time period; identifying at least one reflection of the likeness detection image in the reflection image; determining a location in the reflection image, relative to the subject face, of the at least one reflection; and based on the determined location, making a likeness determination. - View Dependent Claims (19, 20)
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Specification