	US 12,229,336 B2
	Systems and methods for calibrating an eye tracking system
Xiaochun Nie, Mountain View, CA (US)
Filed by Xiaochun Nie, Mountain View, CA (US)
Filed on Jan. 2, 2023, as Appl. No. 18/092,369.
Application 18/092,369 is a division of application No. 16/753,907, granted, now 11,573,630, previously published as PCT/US2018/054914, filed on Oct. 9, 2018.
Claims priority of provisional application 62/570,161, filed on Oct. 10, 2017.
Prior Publication US 2023/0152887 A1, May 18, 2023
Int. Cl. G06F 3/01 (2006.01); G06T 7/73 (2017.01); G06V 10/147 (2022.01); G06V 40/18 (2022.01); H04N 23/90 (2023.01); G06V 10/62 (2022.01)

CPC G06F 3/013 (2013.01) [G06F 3/012 (2013.01); G06T 7/74 (2017.01); G06V 10/147 (2022.01); G06V 40/193 (2022.01); H04N 23/90 (2023.01); G06T 2207/30201 (2013.01); G06V 10/62 (2022.01)]

6 Claims

1. A method comprising:

while a person's head is at a first orientation and the person's eye is gazing at a first point in a 3D space, obtaining a first relative orientation of the eye with respect to an imaging sensor, and obtaining a first spatial orientation of a spatial orientation sensor;

while the head is at a second orientation rotationally offset from the first orientation and the eye is gazing at the first point, obtaining a second relative orientation of the eye with respect to the imaging sensor, and obtaining a second spatial orientation of the spatial orientation sensor;

while the head is at a third orientation and the eye is gazing at a second point in the 3D space, obtaining a third relative orientation of the eye with respect to the imaging sensor, and obtaining a third spatial orientation of the spatial orientation sensor;

while the head is at a fourth orientation rotationally offset from the third orientation and the eye is gazing at the second point, obtaining a fourth relative orientation of the eye with respect to the imaging sensor, and obtaining a fourth spatial orientation of the spatial orientation sensor;

determining a relative orientation of the imaging sensor with respect to the spatial orientation sensor based on the first relative orientation of the eye with respect to the imaging sensor, the second relative orientation of the eye with respect to the imaging sensor, the third relative orientation of the eye with respect to the imaging sensor, the fourth relative orientation of the eye with respect to the imaging sensor, the first spatial orientation of the spatial orientation sensor, the second spatial orientation of the spatial orientation sensor, the third spatial orientation of the spatial orientation sensor, and the fourth spatial orientation of the spatial orientation sensor.