Apple Inc. (Cupertino, CA)
This disclosure is general and relates to the detection eye and head movements. More particularly, but not by way of limitation, this disclosure relates to techniques for detecting the location of the pupil and the application of this information, as well as the use of a head model to monitor the direction of gaze.
It has recently been noted that three-dimensional (3D) head tracking with the video sequence or pose estimation with multiple images is an essential requirement for a robust facial analysis as well as face recognition. These operations often include eye tracking. It can be described as an electronic way of locating the point at which an individual is looking, or recording their movements. In actual practice, eye tracking is provided by tracking and locating the reflections of the cornea from a source of light. Near-infrared and infrared light sources cannot be easily detected by the human eye so they are often utilized as light sources. The pupil is blocked by the infrared, but the iris is able to reflect it, creating a line between the pupil iris.Click here to view the patent on USPTO website.
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