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A novel fiber Bragg grating system for eye tracking
摘要： Eye movement evaluation is vital for diagnosis of various ophthalmological and neurological disorders. The present study proposes a novel, noninvasive, wearable device to acquire the eye movement based on a Fiber Bragg Grating (FBG) Sensor. The proposed Fiber Bragg Grating Eye Tracker (FBGET) can capture the displacement of the eyeball during its movements in the form of strain variations on a cantilever. The muscular displacement generated by the eyeball over the lower eyelid, by its swiveling action while moving the gaze on a target object, is converted into strain variations on a cantilever. The developed FBGET is investigated for dynamic tracking of the eye- gaze movement for various actions of the eye such as fixations, saccades and main sequence. This approach was validated by recording the eye movement using the developed FBGET as well as conventional camera-based eye tracker methodology simultaneously. The experimental results demonstrate the feasibility and the real-time applicability of the proposed FBGET as an eye tracking device. In conclusion, the present study illustrates a novel methodology involving displacement of lower eyelid for eye tracking application along with the employment of FBG sensors to carry out the same. The proposed FBGET can be utilized in both clinical and hospital environment for diagnostic purposes owing to its advantages of wear-ability and ease of implementation making it a point of care device
关键词： Eye Tracker,Fiber Bragg Grating Sensor,Eye muscular movement detection
更新于2025-09-23 15:23:52
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Measuring the Spatial Noise of a Low-Cost Eye Tracker to Enhance Fixation Detection
摘要： The present study evaluates the quality of gaze data produced by a low-cost eye tracker (The Eye Tribe?, The Eye Tribe, Copenhagen, Denmark) in order to verify its suitability for the performance of scienti?c research. An integrated methodological framework, based on arti?cial eye measurements and human eye tracking data, is proposed towards the implementation of the experimental process. The obtained results are used to remove the modeled noise through manual ?ltering and when detecting samples (?xations). The outcomes aim to serve as a robust reference for the veri?cation of the validity of low-cost solutions, as well as a guide for the selection of appropriate ?xation parameters towards the analysis of experimental data based on the used low-cost device. The results show higher deviation values for the real test persons in comparison to the arti?cial eyes, but these are still acceptable to be used in a scienti?c setting.
关键词： ?xation detection algorithm,low-cost eye tracker,arti?cial eyes,spatial noise
更新于2025-09-23 15:22:29
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[ACM Press the 24th Annual International Conference - New Delhi, India (2018.10.29-2018.11.02)] Proceedings of the 24th Annual International Conference on Mobile Computing and Networking - MobiCom '18 - Battery-Free Eye Tracker on Glasses
摘要： This paper presents a battery-free wearable eye tracker that tracks both the 2D position and diameter of a pupil based on its light absorption property. With a few near-infrared (NIR) lights and photodiodes around the eye, NIR lights sequentially illuminate the eye from various directions while photodiodes sense spatial patterns of reflected light, which are used to infer pupil’s position and diameter on the fly via a lightweight inference algorithm. The system also exploits characteristics of different eye movement stages and adjusts its sensing and computation accordingly for further energy savings. A prototype is built with off-the-shelf hardware components and integrated into a regular pair of glasses. Experiments with 22 participants show that the system achieves 0.8-mm mean error in tracking pupil position (2.3 mm at the 95th percentile) and 0.3-mm mean error in tracking pupil diameter (0.9 mm at the 95th percentile) at 120-Hz output frame rate, consuming 395μW mean power supplied by two small, thin solar cells on glasses side arms.
关键词： photodiodes,near-infrared,pupil tracking,energy savings,wearable,battery-free,eye tracker
更新于2025-09-23 15:21:21
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[ACM Press the 3rd International Workshop - Seoul, Republic of Korea (2018.10.22-2018.10.22)] Proceedings of the 3rd International Workshop on Multimedia Alternate Realities - AltMM'18 - Refocusing Supports of Panorama Light-Field Images in Head-Mounted Virtual Reality
摘要： Virtual Reality (VR) has been deeply researched in recent years, although the novel technology delivers some astonishing experience, it may also cause people the sense of imbalance, dizziness, and vomiting when wearing head-mounted displays (HMDs) after a long period of time. In this paper, we combine the light field technology into a novel panorama viewing system implemented on Unity to provide dynamic depth of field and natural focus effect for better user experience. The system is also coped with FOVE, an HMD with eye-tracking technology, to better track the eye movements and collect the gazing parameters, e.g., gazing point, for better user experience. With such a design, a more immersive panorama image/video viewing experience is delivered. An evaluation is held for the user experience, which shows that our proposed system reduces the refocusing time by up to 319 times and increases the subjective Mean Opinion Score (MOS) by 19%.
关键词： eye-tracker,Virtual reality,head-mounted displays,light field
更新于2025-09-10 09:29:36