High-speed eye-tracking based on a synchronized imaging mechanism by dual-ring infrared lighting source

• Xiao Zhang, Lihui Wang, Yuan He, Zhiwei Mou, and Yiqi Cao
• received 03/01/2024; accepted 04/30/2024; posted 04/30/2024; Doc. ID 521840
• Abstract: : It is a challenge for conventional monocular-camera single-light source eye trackingmethods to achieve high-speed eye tracking. In this work, a dual-ring infrared lighting sourcewas designed to achieve bright and dark pupils in high-speed. The eye tracking method used adual-ring infrared lighting source and synchronized triggers for the even and odd camera framesto capture bright and dark pupils. A pupillary corneal reflex was calculated by the centercoordinates of the Purkinje spot and the pupil. A map function was established to map therelationship between pupillary corneal reflex and gaze spots. The gaze coordinate wascalculated based on the mapping function. The average detection time of each gaze spot was3.76 milliseconds.