PDF(Pubmed)
Abstract：
Many video-based eye trackers rely on detecting and tracking ocular features, a task that can be negatively affected by a number of individual or environmental factors. In this context, the aim of this study was to practically evaluate how the use of a scleral contact lens with two integrated nearinfrared lasers (denoted CLP) could improve the tracking robustness in difficult lighting conditions, particularly outdoor ones. We assessed the ability of the CLP (on a model eye) to detect the lasers and to deduce a gaze position with an accuracy better than 1° under four lighting conditions (1 lx, 250 lx, 50 klux and alternating 1lx /250 lx) on an artificial eye. These results were compared to the ability of a commercial eye tracker (Pupil Core) to detect the pupil on human eyes with a confidence score equal to or greater than 0.9. CLP provided good results in all conditions (tracking accuracy and detection rates). In comparison, the Pupil Core performed well in all indoor conditions (99% detection) but failed in outdoor conditions (9.85% detection). In conclusion, the CLP presents strong potential to improve the reliability of video-based eyetrackers in outdoor conditions by providing easy trackable feature.
摘要：
许多基于视频的眼睛跟踪器依赖于检测和跟踪眼睛特征，可能受到许多个人或环境因素负面影响的任务。在这种情况下，这项研究的目的是实际评估如何使用巩膜隐形眼镜与两个集成的近红外激光器（称为CLP）可以提高在困难的照明条件下的跟踪鲁棒性，尤其是户外的。我们评估了CLP（在模型眼睛上）在四种照明条件下（1lx，250lx,50klux和交替的1lx/250lx）。将这些结果与商业眼睛跟踪器(瞳孔核心)以等于或大于0.9的置信度分数检测人眼瞳孔的能力进行比较。CLP在所有条件（跟踪精度和检测率）下都能提供良好的结果。相比之下,瞳孔核心在所有室内条件下表现良好(99%检测),但在室外条件下失败(9.85%检测).总之,CLP通过提供易于跟踪的功能，在户外条件下提高基于视频的眼睛跟踪器的可靠性具有强大的潜力。
