Abstract
Methods for enhancing the accuracy of fixation and saccade detection and the reliability of calibration in video gaze-tracking systems are discussed. The unique aspects of the present approach include effective low-delay noise reduction prior to the detection of fixation changes, monitoring of gaze position in real time by the operator, identification of saccades as small as 0.5° while eliminating false fixations, and a quick, high-precision, semiautomated calibration procedure.
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The author thanks Eyal Reingold, Elizabeth Bosman, and an anonymous reviewer for their comments on a preliminary version of this paper. A listing of the C code for the mapping function and coefficient calculation is available from the author.
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Stampe, D.M. Heuristic filtering and reliable calibration methods for video-based pupil-tracking systems. Behavior Research Methods, Instruments, & Computers 25, 137–142 (1993). https://doi.org/10.3758/BF03204486
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DOI: https://doi.org/10.3758/BF03204486