| 摘要 |
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. |
