Eye Tracker Accuracy: Quantitative Evaluation of the Invisible Eye Center Location
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
ID 4413093
Author(s) Wyder, Stephan; Cattin, Philippe Claude
Author(s) at UniBasel Cattin, Philippe Claude
Year 2017
Title Eye Tracker Accuracy: Quantitative Evaluation of the Invisible Eye Center Location
Journal International Journal of Computer Assisted Radiology and Surgery
Volume 13
Number 10
Pages / Article-Number 1651-1660
Abstract PURPOSE:We present a new method to evaluate the accuracy of an eye tracker-based eye localization system. Measuring the accuracy of an eye tracker's primary intention, the estimated point of gaze, is usually done with volunteers and a set of fixation points used as ground truth. However, verifying the accuracy of the location estimate of a volunteer's eye center in 3D space is not easily possible. This is because the eye center, the center of corneal curvature, is an intangible point. METHODS:We evaluate the eye location accuracy by using an eye phantom instead of eyes of volunteers. For this, we developed a testing stage with a realistic artificial eye and a corresponding kinematic model, which we trained with [Formula: see text] data. This enables us to precisely evaluate the eye location estimate of an eye tracker. RESULTS:We show that the proposed testing stage with the corresponding kinematic model is suitable for such a validation. Further, we evaluate a particular eye tracker-based navigation system and show that this system is able to successfully determine the eye center with a mean accuracy of 0.68 mm. CONCLUSION:We show the suitability of the evaluated eye tracker for eye interventions, using the proposed testing stage and the corresponding kinematic model. The results further enable specific enhancements of the navigation system to potentially get even better results.
ISSN/ISBN 1861-6410 ; 1861-6429
URL https://arxiv.org/pdf/1705.07589.pdf
edoc-URL https://edoc.unibas.ch/63981/
Full Text on edoc No
Digital Object Identifier DOI 10.1007/s11548-018-1808-5
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/29916061
ISI-Number WOS:000446066600015
Document type (ISI) Journal Article

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