Abstract
The stereo vision results from the interaction between geometrical optics and visual psychology. Large depth will bring discomforts for the results of ghosting and flicker. The relevance of the ratio of jumping out depth (RJD) and electroencephalogram (EEG) gravity frequency (GF) was explored to reflect human health under different three-dimensional (3D) depth information (mainly the negative disparity) displayed on a three-dimensional television (3D-TV) with shutter glasses. EEG was obtained from 10 volunteers when they were watching 3D film segments with different negative disparities. The brain GF map shows that the depth information has a stronger influence on the frontal lobe than on the occipital lobe. For regression analysis, nonlinear curve fittings of GF to RJD in Fp1, F3, O2 and T5 channels were mainly performed when RJD ranged from 0 to 3.4, while linear fittings were performed in some special RJD ranges. It also confirms that RJD above 2.2 may lead to discomfort to human body. Finally, it suggests a suitable RJD range for people to watch from the objective method. The outcomes can be used as a guidance to decrease human discomforts induced by 3D production.
Highlights
Despite 3D technology becoming a historical change in modern industry that brings visual feast to people, its disadvantage especially the health impact is increasingly apparent in recent years
gravity frequency (GF) of four segments were put together based on ratio of jumping out depth (RJD), that is, GFs of 16 channels were integrated in accordance with RJD and GFs belong to the same channel and the same RJD would be set in one column
Each column was averaged after the integration and the GF mean value would be ranked in RJD ascending order
Summary
Despite 3D (three-dimensional) technology becoming a historical change in modern industry that brings visual feast to people, its disadvantage especially the health impact is increasingly apparent in recent years. Some feel physical discomforts like eye strain, dizziness, even nausea after watching three-dimensional television (3D-TV). Scientists are exploring the internal factors which can induce these discomforts by using subjective questionnaires or analyzing some physiological signals. Scientists have conrmed that watching 3D-TV for a long time may lead to visual fatigue. The eye strain increases at the same time.[1] Li and his team certied that the event-related potential component
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