Patent ID: 11861873
Assignee: APPLE INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A method of event camera-based gaze tracking, the method comprising:, at a device with one or more processors and a computer-readable storage medium:
receiving a stream of pixel events output by an event camera, the event camera comprising a plurality of pixel sensors positioned to receive light from a surface of an eye, each respective pixel event generated in response to a respective pixel sensor detecting a change in light intensity of the light at a respective event camera pixel that exceeds a comparator threshold;
generating a first input from the stream of pixel events;
generating an initial pupil characteristic based on inputting the first input to a first neural network;
determining a second input comprising a subset of the first input based on the initial pupil characteristic;
generating a correction of the pupil characteristic based on inputting the second input to a second neural network; and
determining a gaze characteristic by adjusting the initial pupil characteristic using the correction.