Depth perception and visual after-effects at stereoscopic workbench displays

T. Alexander, J. Conradi, C. Winkelholz
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引用次数: 13

Abstract

The vivid and clear way of virtual scene presentation in virtual environments (VE) is nearly exclusively accomplished by stereoscopic displays. Depth perception with these displays differs from the viewing conditions in reality and causes usability problems. For this reason three important aspects of visualization at a stereoscopic workbench display were analyzed. The results of three experiments with terrain data as an example application show a significant increase of depth perception when using stereoscopy, while map texturing causes a significant decrease. For additional wireframe texture and head-tracking, no significant effects were found. With regards to the upper and lower bounds of stereoscopic visualization a linear relationship between the maximum elevation of single objects and the distance between fixation and projection plane was specified by regression analysis. Finally, it is shown that 1/2 hour activity at such a display does not result in negative after-effects for the visual system, including visual acuity, phoria, fusion, and stereoscopy. These results suggest the use of stereoscopic workbench displays for presentation of three-dimensional terrain data. In contrast, deficits of depth perception are verified resulting from overload of visual information, or from using a parallax which is too large for the presentation.
立体工作台展示的深度感知和视觉效果
在虚拟环境(VE)中,逼真、清晰的虚拟场景呈现方式几乎完全由立体显示器来完成。这些显示器的深度感知与现实中的观看条件不同,并导致可用性问题。为此,分析了立体工作台显示可视化的三个重要方面。以地形数据为例进行的三个实验结果表明,使用立体视觉可以显著提高深度感知,而地图纹理则会显著降低深度感知。对于额外的线框纹理和头部跟踪,没有发现明显的效果。对于立体可视化的上下界,通过回归分析确定了单个物体的最大标高与固定面与投影面的距离之间的线性关系。最后,研究表明,在这样的显示器下活动1/2小时不会对视觉系统产生负面的后效,包括视力、远视、融合和立体感。这些结果建议使用立体工作台显示来呈现三维地形数据。相反,深度感知的缺陷是由视觉信息过载或视差过大造成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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