Systems and methods for high-resolution gaze tracking

摘要

A system mounted within eyewear or headwear to unobtrusively produce and track reference locations on the surface of one or both eyes of an observer is provided to improve the accuracy of gaze tracking. The system utilizes multiple illumination sources and/or multiple cameras to generate and observe glints from multiple directions. The use of multiple illumination sources and cameras can compensate for the complex, three-dimensional geometry of the head and the significant anatomical variations of the head and eye region that occurs among individuals. The system continuously tracks the initial placement and any slippage of eyewear or headwear. In addition, the use of multiple illumination sources and cameras can maintain high-precision, dynamic eye tracking as an eye moves through its full physiological range. Furthermore, illumination sources placed in the normal line-of-sight of the device wearer increase the accuracy of gaze tracking by producing reference vectors that are close to the visual axis of the device wearer.

主权项

1. A system for determining gaze-tracking locations, comprising:
a device configured to be worn on a wearer's head; one or more illumination sources mounted on the device oriented to illuminate an eye of the wearer; a plurality of eye-tracking cameras mounted on the device and positioned sufficiently spaced apart from one another for viewing the eye from different angles such that features of the eye appear in eye-tracking camera images from at least one of the eye-tracking cameras; and a processor coupled to the eye-tracking cameras for analyzing images of the eye acquired by the eye-tracking cameras to identify one or more glints reflected off the eye from the one or more illumination sources and identify the location of features of the eye relative to the one or more glints to determine locations being viewed by the wearer.