Tobii Accuracy and Precision Test Method for Remote Eye Trackers
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Abstract
This document describes a test method for the measurement of accuracy and precision of remote eye trackers. The method
is extensive as it takes a variety of likely user scenarios into consideration. The test conditions include ideal measurement
conditions, large gaze angles, different illumination levels and head positions in the track box. Precision is also measured on
artificial eyes in order to differentiate between system noise and expected precision on human eyes, with human artifacts
included. Accuracy and precision are calculated from stable eye tracking data with high trackability; which is verified in realtime.
Both metrics are presented based on monocular (dominant eye) and binocular data. Along with the method, an open
source software tool is provided to simplify the tests, developed especially for accuracy and precision measurements. The
software is free for anyone to use.
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Purdue University