Beibin Li, JC Snider, Quan Wang, Sachin Mehta, Claire E. Foster, E. Barney, Linda G. Shapiro, P. Ventola, F. Shic
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Calibration Error Prediction: Ensuring High-Quality Mobile Eye-Tracking
Gaze calibration is common in traditional infrared oculographic eye tracking. However, it is not well studied in visible-light mobile/remote eye tracking. We developed a lightweight real-time gaze error estimator and analyzed calibration errors from two perspectives: facial feature-based and Monte Carlo-based. Both methods correlated with gaze estimation errors, but the Monte Carlo method associated more strongly. Facial feature associations with gaze error were interpretable, relating movements of the face to the visibility of the eye. We highlight the degradation of gaze estimation quality in a sample of children with autism spectrum disorder (as compared to typical adults), and note that calibration methods may improve Euclidean error by 10%.
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