Recent advances in 3D displays have contributed to the pressing need of new measurement methods for display comfort. Developing a valid measurement of visual fatigue caused by 3D display remains a big challenge and is beneficial for optimizing the system design. This paper assessed three electroencephalography (EEG) activities, θ, α and β, during a monotonous and repetitive random dot stereogram (RDS) based task in a conventional stereoscopic 3D display. Six types of ratio indices were computed based on EEG data and assessed as possible indicators for stereoscopic visual fatigue detection. The results of critical flicker frequency (CFF) and accommodative amplitude (ACC) showed that the proposed experiment setup can induce visual fatigue. According to the subjective ratings, the visual fatigue accumulated in this task was mostly related to the binocular vision stress of 3D display. Results of EEG data showed stable θ activity, a significant increase of α activity, and a significant decrease of β activity over time (p<0.05). In addition, the effectiveness of EEG indices was evaluated to measure stereoscopic visual fatigue by using grey relation analysis (GRA) and verified by correlating with CFF. The results of analysis suggest that among all nine types of EEG indices (θ, α, β, θ/β, α/β, α/θ, θ/(α+β), (α+θ)/β, (α+θ)/(α+β)), α is the most promising indicator for detecting stereoscopic visual fatigue.Index Terms-3D display, visual fatigue, EEG, objective measurement, grey relation analysis. 1551-319X (c)

Binocular rivalry is a phenomenon of visual competition in which perception alternates between two monocular images. When two eye's images only differ in luminance, observers may perceive shininess, a form of rivalry called binocular luster. Does dichoptic information guide attention in visual search? Wolfe and Franzel (Perception & Psychophysics, 44(1), 81-93, 1988) reported that rivalry could guide attention only weakly, but that luster (shininess) "popped out," producing very shallow Reaction Time (RT) × Set Size functions. In this study, we have revisited the topic with new and improved stimuli. By using a checkerboard pattern in rivalry experiments, we found that search for rivalry can be more efficient (16 ms/item) than standard, rivalrous grating (30 ms/item). The checkerboard may reduce distracting orientation signals that masked the salience of rivalry between simple orthogonal gratings. Lustrous stimuli did not pop out when potential contrast and luminance artifacts were reduced. However, search efficiency was substantially improved when luster was added to the search target. Both rivalry and luster tasks can produce search asymmetries, as is characteristic of guiding features in search. These results suggest that interocular differences that produce rivalry or luster can guide attention, but these effects are relatively weak and can be hidden by other features like luminance and orientation in visual search tasks.

No abstract

No abstract

No abstract

Developing a valid measurement of visual fatigue induced by 3D display remains a big challenge and is beneficial for optimizing the system design. In this paper, effects of 3D visual fatigue on the dynamics of saccadic eye movements are examined. Thirteen subjects participate in a random dot stereogram (RDS) based task, the performing of the task by the subjects is assumed to directly influence the level of visual fatigue that is evaluated using subjective ratings, optometric tests and eye movement indices. The results of critical fusion frequency (CFF) and accommodation measurement (ACC) show that the proposed experiment setup can induce visual fatigue. According to the subjective ratings, the visual fatigue accumulated in the experiment is mostly related to the binocular vision stress of 3D display. The peak velocitymagnitude relationship of saccadic eye movements decreases after the experiment, and no significant differences are observed in the other saccadic parameters. Our conclusion is that saccadic eye movement, particularly the peak velocity-magnitude relationship, is a sensitive indicator for visual fatigue caused by 3D display and has the potential to help the establishment of a valid on-line measure for the detection of 3D visual fatigue.

No abstract

No abstract