SYSTEMS AND METHODS FOR EYE TRACKING USING RETROREFLECTOR-ENCODED INFORMATION
First Claim
1. An eye tracking system (200) comprising:
- a light source (204) configured to emit infrared (“
IR”
) light;
an optical sensor (206) disposed adjacent to the light source and configured to detect IR light; and
one or more retroreflectors (210) disposed on headgear, wherein the one or more retroreflectors are configured to reflect the IR light back toward the light source, and wherein the reflected IR light is captured as IR images by the optical sensor, the IR images provide information regarding the location and head orientation of a person wearing the headgear.
1 Assignment
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Accused Products
Abstract
Embodiments of the present invention are directed to eye tracking systems and methods that can be used in uncontrolled environments and under a variety of lighting conditions. In one aspect, an eye tracking system (200) includes a light source (204) configured to emit infrared (“IR”) light, and an optical sensor (206) disposed adjacent to the light source and configured to detect IR light. The system also includes one or more retroreflectors (210) disposed on headgear. The one or more retroreflectors are configured to reflect the IR light back toward the light source. The reflected IR light is captured as IR images by the optical sensor. The IR images provide information regarding the location and head orientation of a person wearing the headgear.
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Citations
15 Claims
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1. An eye tracking system (200) comprising:
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a light source (204) configured to emit infrared (“
IR”
) light;an optical sensor (206) disposed adjacent to the light source and configured to detect IR light; and one or more retroreflectors (210) disposed on headgear, wherein the one or more retroreflectors are configured to reflect the IR light back toward the light source, and wherein the reflected IR light is captured as IR images by the optical sensor, the IR images provide information regarding the location and head orientation of a person wearing the headgear. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An eye tracking method comprising:
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illuminating a space occupied by a person with infrared (“
IR”
) light (1101);capturing one or more IR images of the IR light reflected from one or more retroreflectors disposed on headgear worn by the person using an optical sensor (1102); and determining the location and head orientation of the person based on the one or more IR images (1103). - View Dependent Claims (11, 12, 13, 14, 15)
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Specification