A low-cost, high-performance video-based binocular eye tracker for psychophysical research.

IF 1.3 4区 心理学 Q3 OPHTHALMOLOGY
Daria Ivanchenko, Katharina Rifai, Ziad M Hafed, Frank Schaeffel
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引用次数: 10

Abstract

We describe a high-performance, pupil-based binocular eye tracker that approaches the performance of a well-established commercial system, but at a fraction of the cost. The eye tracker is built from standard hardware components, and its software (written in Visual C++) can be easily implemented. Because of its fast and simple linear calibration scheme, the eye tracker performs best in the central 10 degrees of the visual field. The eye tracker possesses a number of useful features: (1) automated calibration simultaneously in both eyes while subjects fixate four fixation points sequentially on a computer screen, (2) automated realtime continuous analysis of measurement noise, (3) automated blink detection, (4) and realtime analysis of pupil centration artifacts. This last feature is critical because it is known that pupil diameter changes can be erroneously registered by pupil-based trackers as a change in eye position. We evaluated the performance of our system against that of a wellestablished commercial system using simultaneous measurements in 10 participants. We propose our low-cost eye tracker as a promising resource for studies of binocular eye movements.

Abstract Image

Abstract Image

Abstract Image

用于心理物理研究的低成本,高性能视频双目眼动仪。
我们描述了一种高性能,基于瞳孔的双目眼动仪,其性能接近成熟的商业系统,但成本只是一小部分。眼动仪由标准硬件组件构建,其软件(用Visual c++编写)可以很容易地实现。由于其快速、简单的线性校准方案,眼动仪在视野中心10度处表现最佳。眼动仪具有许多有用的功能:(1)当受试者在计算机屏幕上依次注视四个注视点时,双眼同时自动校准;(2)自动实时连续分析测量噪声;(3)自动眨眼检测;(4)实时分析瞳孔集中伪影。最后一个特征是至关重要的,因为我们知道瞳孔直径的变化可能会被瞳孔跟踪器错误地记录为眼睛位置的变化。我们通过同时测量10个参与者来评估我们的系统与一个完善的商业系统的性能。我们提出我们的低成本眼动仪作为一个有前途的资源,研究双眼眼球运动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.90
自引率
33.30%
发文量
10
审稿时长
10 weeks
期刊介绍: The Journal of Eye Movement Research is an open-access, peer-reviewed scientific periodical devoted to all aspects of oculomotor functioning including methodology of eye recording, neurophysiological and cognitive models, attention, reading, as well as applications in neurology, ergonomy, media research and other areas,
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