Performance of a remote eye-tracker in measuring gaze during walking

Valeria Serchi, Agnese Peruzzi, Andrea Cereatti, Ugo Della Croce

Abstract

Combining virtual environments and eyetracking can provide insights about the relationship between gaze and gait in people at high risk of fall. Remote eye-trackers can estimate gaze while the head moves within a limited workspace, but several factors can influence accuracy and precision. This study aimed at assessing the performance of a remote eyetracker both during controlled head movements and walking on a treadmill, while the visual stimulus moved on the screen. The head range of motion during gaze estimation was determined. The distance from the eye-tracker influenced data accuracy and precision of gaze estimation, while the target location was not a critical factor. The best accuracy was achieved at 650 mm from the eye-tracker (11±3 mm) and, during walking. Gaze fixations hitting static and moving objects were counted during standing (87 to 93 %) and walking (85 to 98 %), providing promising results for applications in virtual environments.

Keywords

eye-tracking, gait, treadmill, point of gaze, virtual reality

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IMEKO-TC4-2014-340.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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