Head-mounted eye-Trackers allow for unrestricted behavior in the natural environment, but have calibration issues that compromise accuracy and usability. A well-known problem arises from the fact that gaze measurements suffer from parallax error due to the offset between the scene camera origin and eye position. To compensate for this error two pieces of data are required: The pose of the scene camera in head coordinates, and the three-dimensional coordinates of the fixation point in head coordinates. We implemented a method that allows for effective and accurate eye-Tracking in the three-dimensional environment. Our approach consists of a calibration procedure that allows to contextually calibrate the eye-Tracker and compute the eyes pose in the reference frame of the scene camera, and a custom stereoscopic scene camera that provides the three-dimensional coordinates of the fixation point. The resulting gaze data are free from parallax error, allowing accurate and effective use of the eye-Tracker in the natural environment.

Solving Parallax Error for 3D Eye Tracking / Gibaldi, A.; Dutell, V.; Banks, M. S.. - 169260:(2021). (Intervento presentato al convegno 2021 ACM Symposium on Eye Tracking Research and Applications, ETRA 2021 tenutosi a gbr nel 2021) [10.1145/3450341.3458494].

Solving Parallax Error for 3D Eye Tracking

Gibaldi A.;
2021

Abstract

Head-mounted eye-Trackers allow for unrestricted behavior in the natural environment, but have calibration issues that compromise accuracy and usability. A well-known problem arises from the fact that gaze measurements suffer from parallax error due to the offset between the scene camera origin and eye position. To compensate for this error two pieces of data are required: The pose of the scene camera in head coordinates, and the three-dimensional coordinates of the fixation point in head coordinates. We implemented a method that allows for effective and accurate eye-Tracking in the three-dimensional environment. Our approach consists of a calibration procedure that allows to contextually calibrate the eye-Tracker and compute the eyes pose in the reference frame of the scene camera, and a custom stereoscopic scene camera that provides the three-dimensional coordinates of the fixation point. The resulting gaze data are free from parallax error, allowing accurate and effective use of the eye-Tracker in the natural environment.
2021
2021 ACM Symposium on Eye Tracking Research and Applications, ETRA 2021
gbr
2021
169260
Gibaldi, A.; Dutell, V.; Banks, M. S.
Solving Parallax Error for 3D Eye Tracking / Gibaldi, A.; Dutell, V.; Banks, M. S.. - 169260:(2021). (Intervento presentato al convegno 2021 ACM Symposium on Eye Tracking Research and Applications, ETRA 2021 tenutosi a gbr nel 2021) [10.1145/3450341.3458494].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1362482
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