Opt Express. 2023 Nov 20;31(24):39880-39892. doi: 10.1364/OE.505530.
Eye trackers play a crucial role in the development of future display systems, such as head-mounted displays and augmented reality glasses. However, ensuring robustness and accuracy in gaze estimation poses challenges, particularly with limited space available for the transmitter and receiver components within these devices. To address the issues, we propose what we believe is a novel eye tracker design mounted on foldable temples, which not only supports accurate gaze estimation but also provides slim form-factor and unobstructed vision. Our temple-mounted eye tracker utilizes a near-infrared imaging system and incorporates a patterned near-infrared mirror for calibration markers. We present wearable prototypes of the eye tracker and introduce a unique calibration and gaze extraction algorithm by considering the mirror's spatial reflectance distribution. The accuracy of gaze extraction is evaluated through tests involving multiple users with realistic scenarios. We conclude with an evaluation of the results and a comprehensive discussion on the applicability of the temple-mounted eye tracker.
眼动追踪器在未来显示系统（如头戴式显示器和增强现实眼镜）的发展中发挥着至关重要的作用。然而，在这些设备中，由于发射器和接收器组件的空间有限，确保注视估计的稳健性和准确性存在挑战。为了解决这些问题，我们提出了一种我们认为是新颖的折叠式镜腿上安装的眼动追踪器设计，它不仅支持准确的注视估计，而且还提供了轻薄的外形和无障碍的视野。我们的镜腿安装式眼动追踪器使用近红外成像系统，并结合了用于校准标记的图案化近红外反射镜。我们展示了眼动追踪器的可穿戴原型，并通过考虑镜子的空间反射率分布，引入了一种独特的校准和注视提取算法。我们通过涉及具有现实场景的多个用户的测试来评估注视提取的准确性。最后，我们对结果进行了评估，并全面讨论了镜腿安装式眼动追踪器的适用性。
