Abstract
We propose a new method for measuring the degree of eyestrain on 3D stereoscopic displays using a glasses-type of eye tracking device. Our study is novel in the following four ways: first, the circular area where a user's gaze position exists is defined based on the calculated gaze position and gaze estimation error. Within this circular area, the position where edge strength is maximized can be detected, and we determine this position as the gaze position that has a higher probability of being the correct one. Based on this gaze point, the eye foveation model is defined. Second, we quantitatively evaluate the correlation between the degree of eyestrain and the causal factors of visual fatigue, such as the degree of change of stereoscopic disparity (CSD), stereoscopic disparity (SD), frame cancellation effect (FCE), and edge component (EC) of the 3D stereoscopic display using the eye foveation model. Third, by comparing the eyestrain in conventional 3D video and experimental 3D sample video, we analyze the characteristics of eyestrain according to various factors and types of 3D video. Fourth, by comparing the eyestrain with or without the compensation of eye saccades movement in 3D video, we analyze the characteristics of eyestrain according to the types of eye movements in 3D video. Experimental results show that the degree of CSD causes more eyestrain than other factors.
Highlights
With the popularity of 3D stereoscopic displays, 3D stereoscopic content has been distributed widely through various types of media, such as 3D movies in theaters, 3D TV, and 3D mobile devices.Currently available 3D stereoscopic displays require the user to wear anaglyph, passive or active shutter glasses, some 3D stereoscopic displays that are not based on glasses have been commercialized recently
We analyzed the data from eight participants, excluding the error data from four participants, which were caused by the incorrect detections of pupil and specular reflection (SR) regions, or by gazing at regions different from the monitor during the experiments
We proposed a new method for measuring the degree of eyestrain caused by viewing
Summary
With the popularity of 3D stereoscopic displays, 3D stereoscopic content has been distributed widely through various types of media, such as 3D movies in theaters, 3D TV, and 3D mobile devices.Currently available 3D stereoscopic displays require the user to wear anaglyph, passive or active shutter glasses, some 3D stereoscopic displays that are not based on glasses have been commercialized recently. In spite of the maturity of 3D eyeglass displays, eyestrain from viewing them is caused by various factors and remains a problem that must be overcome To solve this problem, we require a method that can measure the degree of eyestrain accurately and objectively. Research that analyzes eyestrain using subjective methods can be influenced by daily conditions, states, and the perception of participants These methods cannot be used for online measurement of eyestrain when a user is viewing the display, because such research requires participants to answer questionnaires. Objective methods can be used to measure eyestrain using physiological signals such as accommodation response, accommodative-convergence over accommodation ratio, eye pressure, blinking rate (BR), pupil accommodation speed, electrical activity of the heart, galvanic skin response, skin temperature, brain signal, and refraction [2,3,4,5,6,7,8,9,10,11]. In a previous research [5], autonomic nervous system responses were measured based on heart rate, galvanic skin response, and skin temperature with subjects watching 2D or 3D displays
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