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http://dx.doi.org/10.6109/jkiice.2014.18.10.2417

Glint Reconstruction Algorithm Using Homography in Gaze Tracking System  

Ko, Eun-Ji (Division of Digital Media, Ewha Womans University)
Kim, Myoung-Jun (Division of Digital Media, Ewha Womans University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.18, no.10, 2014 , pp. 2417-2426 More about this Journal
Abstract
Remote gaze tracking system calculates the gaze from captured images that reflect infra-red LEDs in cornea. Glint is the point that reflect infra-red LEDs to cornea. Recently, remote gaze tracking system uses a number of IR-LEDs to make the system less prone to head movement and eliminate calibration procedure. However, in some cases, some of glints are unable to spot. In this case, it is impossible to calculate gaze. This study examines patterns of glints that are difficult to detect in remote gaze tracking system. Afterward, we propose an algorithm to reconstruct positions of missing glints that are difficult to detect using other detected glints. Based on this algorithm, we increased the number of valid image frames in gaze tracking experiments, and reduce errors of gaze tracking results by correcting glint's distortion in the reconstruction phase.
Keywords
gaze tracking; corneal reflection; glint; homography;
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