Optics of the human cornea influence the accuracy of stereo eye-tracking methods: a simulation study

被引：18

作者：

Barsingerhorn, A. D. ^{[1
]}

Boonstra, F. N. ^{[1
,2
]}

Goossens, H. H. L. M. ^{[1
]}

机构：

[1] Radboud Univ Nijmegen, Med Ctr Nijmegen, Donders Inst Brain Cognit & Behav, Dept Cognit Neurosci, POB 9101, NL-6500 HB Nijmegen, Netherlands

[2] Inst Visually Impaired, Bartimeus, Van Renesselaan 309, NL-3703 AJ Zeist, Netherlands

来源：

BIOMEDICAL OPTICS EXPRESS | 2017年 / 8卷 / 02期

关键词：

GAZE TRACKING; PUPIL; MODEL;

D O I：

10.1364/BOE.8.000712

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Current stereo eye-tracking methods model the cornea as a sphere with one refractive surface. However, the human cornea is slightly aspheric and has two refractive surfaces. Here we used ray-tracing and the Navarro eye-model to study how these optical properties affect the accuracy of different stereo eye-tracking methods. We found that pupil size, gaze direction and head position all influence the reconstruction of gaze. Resulting errors range between +/- 1.0 degrees at best. This shows that stereo eye-tracking may be an option if reliable calibration is not possible, but the applied eye-model should account for the actual optics of the cornea. (C) 2017 Optical Society of America

引用

页码：712 / 725

页数：14

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