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A study on the effects of the gravity and the visually-perceived subjective vertical on occurrence of visually-induced motion sickness caused by 3D movie

重力和视觉感知主观垂直对3D电影引起的视觉晕动病发生的影响研究

基本信息

批准号：
13680938
负责人：
NAOKI Isu
金额：
$ 1.98万
依托单位：
Mie University (2003)Tottori University (2001-2002)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

The effects of the sensation of self-motion and special orientation in a virtual space generated by 3D movie were investigated on occurrence of visually-induced motion sickness. When virtual reality is provided by 3D movie, the sensation of the vertical direction, subjective vertical, is derived via visual perception. 3D movies, taken by virtual cameras in virtual spaces with/without up-and-down direction, were produced, by computer graphics, so that the subjective vertical was visually perceived in some of them, and was not in others. They were used to compare the severity of visually-induced motion sickness. Rotation around the vertical axis in a virtual space with up-and-down direction (the visual vertical kept in a constant direction) caused a similar degree of discomfort, compared with rotation in a virtual space without up-and-down direction (the visual vertical was not perceived). Rotation around the horizontal axis in a virtual space with up-and-down direction (the visual vertical kept rotating) provoked severer discomfort than the above two rotations. It is likely that the sensation of self-rotation with directional change relative to the gravity enhanced the discomfort because it generated visual-otolithic conflict of sensation in addition to visual-canal conflict.The effects of the sense of presence in a virtual space were also investigated on occurrence of visually-induced motion sickness. Two video cameras were mounted on a two-axes rotator and took 3D movies in a real space with changing a view angle from the cameras. The 3D movies were projected on a screen with changing a view angle from audiences. In accordance with enlargement of the view angle from audiences, the sensation of presence increased, the sensation of self-motion became more intense, and the severity of visually-induced motion sickness enhanced. There found no significant differences in the above sensations or the severity of discomfort depending on the view angle from cameras.

研究了在3D电影所产生的虚拟空间中自我运动感和特定方位感对视觉诱发运动病发生的影响。当虚拟现实由3D电影提供时，垂直方向的感觉，即主观垂直，是通过视觉感知来获得的。3D电影，由虚拟相机在虚拟空间中拍摄，有/没有上下方向，由计算机图形制作，因此主观垂直在其中一些中被视觉感知，而在其他中则没有。他们被用来比较视觉诱发的运动病的严重程度。在具有上下方向的虚拟空间中围绕垂直轴旋转（视觉垂直保持在恒定方向上）引起的不适程度与在没有上下方向的虚拟空间中旋转（视觉垂直没有被感知到）相似。在一个有上下方向的虚拟空间中绕水平轴旋转（视觉垂直线不断旋转）比上述两种旋转引起更大的不适。这可能是自我旋转的感觉与方向的变化，相对于重力增强了不适，因为它产生的视觉-耳石的冲突，除了视觉-渠道confliction.The虚拟空间中的存在感的影响，还调查了视觉诱发晕动病的发生。两个摄像机安装在两轴旋转器上，并通过改变摄像机的视角在真实的空间中拍摄3D电影。将3D电影投影在屏幕上，改变观众的视角。随着观看者视角的扩大，存在感增强，自我运动感增强，视觉诱发的晕动病的严重程度增强。没有发现上述感觉或不适的严重程度取决于相机的视角的显着差异。