Systems and methods for calibrating eye tracking

1 . A head-wearable display device comprising:

an imaging device configured to provide calibration data indicating a position of a calibration indicator; and

processing circuitry configured to:

compare the position of the calibration indicator to a reference position for the calibration indicator to determine a difference in position for the calibration indicator;

determine that the difference in position for the calibration indicator is greater than a threshold; and

calibrate, responsive to the determination, a gaze direction of a user relative to the display device based at least in part on the difference in position.

2 . The head-wearable display device of claim 1 , wherein the one or more calibration indicators comprise one of an active fiducial or a passive fiducial.

3 . The head-wearable display device of claim 1 , wherein the one or more calibration indicators are positioned about a display of the display device outside of a viewing region of the user's eyes.

4 . The head-wearable display device of claim 1 , wherein the reference position for each calibration indicator is a baseline position before the display device is used by the user.

5 . The head-wearable display device of claim 1 , wherein the reference position for each calibration indicator is a position of each calibration indicator after a previous adjustment of calibration settings.

6 . The head-wearable display device of claim 1 , wherein the threshold comprises a trigger value that indicates the display device is to be calibrated.

7 . The head-wearable display device of claim 1 , wherein the imaging device is further configured to provide eye-tracking data of the user's eyes, the eye-tracking data used by the processing circuitry to identify the gaze direction.

8 . The head-wearable display device of claim 1 , wherein the processing circuitry is further configured to determine an offset amount for one of a gaze vector or a gaze location to calibrate eye tracking.

9 . The head-wearable display device of claim 1 , wherein the processing circuitry is further configured to calibrate, using the difference in position, a gaze vector or a gaze location for eye tracking.

10 . A display device comprising:

an imaging device configured to provide image data for eye tracking of a user's eyes and calibration data indicating a position of one or more calibration indicators; and

processing circuitry configured to:

determine a position and an orientation of a display of the display device relative to the imaging device based at least based on the position of the one or more calibration indicators;

compare the position and orientation of the display to a corresponding reference position and orientation to determine a difference in one of the position or the orientation of the display;

determine, based on at least the difference in one of the position or the orientation of the display, that a gaze vector for eye tracking is to be calibrated; and

calibrate, responsive to the determination, the gaze vector using at least the difference in one of the position or the orientation of the display.

11 . The display device of claim 10 , wherein the corresponding reference position and orientation of the display comprise a baseline reference before the display device is used by the user.

12 . The display device of claim 10 , wherein the corresponding reference position and orientation of the display comprises a reference position or orientation after one or more calibration settings are adjusted.

13 . The display device of claim 10 , wherein the processing circuitry is further configured to identify the position of the one or more calibration indicators from the calibration data.

14 . The display device of claim 12 , wherein the processing circuitry is further configured to identify the position as x, y and z coordinates.

15 . The display device of claim 10 , wherein the processing circuitry is further configured to identify the position of the display by determining a centroid of the one or more calibration indicators.

16 . A method for calibrating a display device, the method comprising:

receiving, by processing circuitry of a display device from an imaging device, image data for eye tracking of a user's eyes and calibration data indicating a position of a calibration indicator;

comparing, by the processing circuitry, the position of each calibration indicator of the calibration indicator to a reference position for each calibration indicator to determine a difference in position for the calibration indicator;

determining, by the processing circuitry, that the difference in position for the calibration indicator is greater than a threshold; and

calibrating, by the processing circuitry, responsive to the determination, the eye tracking of the display device using the difference in position.

17 . The method of claim 16 , further comprising calibrating, by the processing circuitry using the difference in position, a gaze vector of the eye tracking.

18 . The method of claim 16 , further comprising calibrating, by the processing circuitry using the difference in position, a gaze location of the eye tracking.

19 . The method of claim 16 , further comprising determining, by the processing circuitry, an offset amount for one of a gaze vector or a gaze location to calibrate the eye tracking.

20 . The method of claim 16 , wherein the reference position for each calibration indicator is one of a baseline position before the display device is used by the user or after a previous adjustment of the calibration settings.