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Mohamed Khamis, Axel Hoesl, Alexander Klimczak, Martin Reiss, Florian Alt, Andreas Bulling
EyeScout: Active Eye Tracking for Position and Movement Independent Gaze Interaction with Large Public Displays
In UIST '17: Proceedings of the 30th ACM International User Interface Software and Technology Symposium, Quebec City, Canada, October 22-25, 2017. ACM, New York, NY, USA. (bib)

While gaze holds a lot of promise for hands-free interaction with public displays, remote eye trackers with their confined tracking box restrict users to a single stationary position in front of the display. We present EyeScout, an active eye tracking system that combines an eye tracker mounted on a rail system with a computational method to automatically detect and align the tracker with the user's lateral movement. EyeScout addresses key limitations of current gaze-enabled large public displays by offering two novel gaze-interaction modes: In 'Walk then Interact' the user can walk up to an arbitrary position in front of the display and interact, while in 'Walk and Interact' the user can interact even while on the move. We report on a user study that shows that EyeScout is well perceived by users, extends a public display's sweet spot into a sweet line, and reduces the time required to kick-off gaze interaction to 3.5 seconds -- a 62% improvement over state of the art solutions. We discuss sample applications that demonstrate how EyeScout can enable position and movement-independent gaze interaction with large public displays.