Is High Accuracy Gaze Direction Determination Always Needed?

J.L. Beckmann and R.A. Volz (USA)


Gaze determination, eye rotation, eye center


A significant number of accurate (with ± 1 degree of error), non-intrusive 3D gaze determination systems are now publicly available. A majority of these systems rely on some variation of the pupil-center/corneal-reflection method for locating the gaze point. Unfortunately, because of their cost (roughly $15,000 and up), these systems are not good candidates for incorporating gaze location information into many everyday, real-world applications or interfaces, especially when the applications do not need a high degree of gaze point accuracy. In this paper, we describe an approach being investigated to facilitate a lower cost, but lower accuracy gaze point determination. The method is based on an assumption derived from Listing’s Law that the eyeball rotates about a fixed point. We describe a technique for estimating the center of rotation of the eyeball (unique for each individual), and then use this in conjunction with an estimate of the pupil location determined from image processing to determine the gaze direction.

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