Ms. Tingting Wang Profile

Tingting Wang

at Institute of Software

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Proceedings Article | 6 March 2014 Paper

Stereoscopic visual fatigue assessment and modeling

Danli Wang, Tingting Wang, Yue Gong

Proceedings Volume 9011, 901122 (2014) https://doi.org/10.1117/12.2039361

KEYWORDS: Visualization, Picosecond phenomena, Visual process modeling, Eye, Infrared cameras, Video, Stereoscopic displays, 3D displays, Measurement devices, Video processing

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Evaluation of stereoscopic visual fatigue is one of the focuses in the user experience research. It is measured in either subjective or objective methods. Objective measures are more preferred for their capability to quantify the degree of human visual fatigue without being affected by individual variation. However, little research has been conducted on the integration of objective indicators, or the sensibility of each objective indicator in reflecting subjective fatigue. The paper proposes a simply effective method to evaluate visual fatigue more objectively. The stereoscopic viewing process is divided into series of sessions, after each of which viewers rate their visual fatigue with subjective scores (SS) according to a five-grading scale, followed by tests of the punctum maximum accommodation (PMA) and visual reaction time (VRT). Throughout the entire viewing process, their eye movements are recorded by an infrared camera. The pupil size (PS) and percentage of eyelid closure over the pupil over time (PERCLOS) are extracted from the videos processed by the algorithm. Based on the method, an experiment with 14 subjects was conducted to assess visual fatigue induced by 3D images on polarized 3D display. The experiment consisted of 10 sessions (5min per session), each containing the same 75 images displayed randomly. The results show that PMA, VRT and PERCLOS are the most efficient indicators of subjective visual fatigue and finally a predictive model is derived from the stepwise multiple regressions.

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