Eye tracking using video information and electrooculography information

An electronic device for eye tracking, comprising:

• a viedo oculography (VOG) sensor to track a position of an eye of a user;
• an electrooculography (EOG) sensor to track the position of the eye of the user, wherein the EOG sensor has a lower power consumption than the VOG sensor;
• and
• a processor configured to execute a process including:
• detecting, based on VOG signals from the VOG sensor, that the eye does not change position for a time period;
• stopping operation of the VOG senror in response to detecting that the eye does not change position for the time period;
• triggering the EOG sensor to track the position of the eye responsive to stopping the operation of the VOG sensor;
• and
• resuming operation of the VOG sensor in response to a detection, based on EOG signals of the EOG sensor, of a change of the position of the eye.

A method of eye tracking, comprising:

• operating a video oculography (VOG) sensor to track positions of an eye of a user at a first frame rate;
• determining the positions of the eye at keyframes based on VOG signals collected from the VOG sensor at the first frame rate, wherein the VOG sensor stops operating based on the eye remaining in a fixed position for a time period;
• operating am electrooculography (EOG) sensor to track the positions of the eye of the user at a second frame rate upon stopping an operation of the VOG sensor, wherein the EOG sensor has a lower power consumption than the VOG sensor, wherein the first frame rate is lower than the second frame rate;
• determining the positions of the eye at regular frames based on EOG signals collected from the EOG sensor at the second frame rate;
• determining a fixation point at a user interface based on a current position from the fixed position of the eye being tracked;
• conducting a foveated rendering of the user interface based on the fixation point;
• and
• resuming operation of the VOG sensor in response to a detection, based on the EOG signals from the EOG sensor, of a change of a position of the eye.