Evaluation of the Tobii EyeX Eye tracking controller and Matlab toolkit for research.
Evaluation of the Tobii EyeX Eye tracking controller and Matlab toolkit for research.
复制标题
Tobii EyeX眼动追踪控制器的评估与Matlab工具箱的研究。
DOI：
10.3758/s13428-016-0762-9
复制
发表时间：
2017-06
影响因子：
5.4
通讯作者：
Maiello G
中科院分区：
文献类型：
--
作者：
Gibaldi A;Vanegas M;Bex PJ;Maiello G
Tobii Eyex控制器是一款新型的低成本双目眼动仪，用于游戏和消费类应用的集成。制造商声称，该系统是为自然的眼睛凝视交互而设计的，不需要连续的重新校准，并且允许适度的头部运动。控制器提供了一个SDK，以促进新的眼动跟踪应用程序的开发。我们回顾了该设备的特点，其可能用于科学研究。我们开发并评估了一个开源的Matlab工具包，可用于与EyeX设备进行交互，用于在行为实验中进行凝视记录。该工具包提供了针对双眼和单眼实验的校准程序，以及评估其他眼动跟踪设备的程序。所观察到的EyeX性能（即准确度< 0.6°，精度< 0.25°，延迟< 50 ms，采样频率<55 Hz）足以满足某些类别的研究应用。该装置可以成功地用于测量注视参数、扫视、平滑追踪和聚散眼球运动。然而，相对较低的采样率和中等精度限制了EyeX用于监测微扫视眼球运动或用于实时注视视情况刺激控制的适用性。对于这些应用，研究级的高成本眼动跟踪技术可能仍然是必要的。因此，尽管EyeX在高端设备方面存在局限性，但它有可能进一步向广大受众传播眼动追踪技术，并可能成为消费者和游戏应用以及基础和临床研究环境的一个子集的宝贵资产。
The Tobii Eyex Controller is a new low-cost binocular eye tracker marketed for integration in gaming and consumer applications. The manufacturers claim that the system was conceived for natural eye gaze interaction, does not require continuous recalibration, and allows moderate head movements. The Controller is provided with a SDK to foster the development of new eye tracking applications. We review the characteristics of the device for its possible use in scientific research. We develop and evaluate an open source Matlab Toolkit that can be employed to interface with the EyeX device for gaze recording in behavioral experiments. The Toolkit provides calibration procedures tailored to both binocular and monocular experiments, as well as procedures to evaluate other eye tracking devices. The observed performance of the EyeX (i.e. accuracy < 0.6°, precision < 0.25°, latency < 50 ms and sampling frequency ≈55 Hz), is sufficient for some classes of research application. The device can be successfully employed to measure fixation parameters, saccadic, smooth pursuit and vergence eye movements. However, the relatively low sampling rate and moderate precision limit the suitability of the EyeX for monitoring micro-saccadic eye movements or for real-time gaze-contingent stimulus control. For these applications, research grade, high-cost eye tracking technology may still be necessary. Therefore, despite its limitations with respect to high-end devices, the EyeX has the potential to further the dissemination of eye tracking technology to a broad audience, and could be a valuable asset in consumer and gaming applications as well as a subset of basic and clinical research settings.