Visual blur in immersive virtual environments: does depth of field or motion blur affect distance and speed estimation?
Visual blur in immersive virtual environments: does depth of field or motion blur affect distance and speed estimation?
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DOI：
10.1145/2993369.2993379
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发表时间：
2016-11
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影响因子：
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通讯作者：
E. Langbehn;Tino Raupp;G. Bruder;Frank Steinicke;Benjamin Bolte;M. Lappe
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文献类型：
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作者：
E. Langbehn;Tino Raupp;G. Bruder;Frank Steinicke;Benjamin Bolte;M. Lappe
几十年来，人们都知道，与现实世界中的相应判断相比，用户在沉浸式虚拟环境（IVEs）中往往会严重低估或高估距离或速度。尽管过去已经确定了几个因素可以解释这种影响的一小部分，但这些感知差异的主要原因仍然难以捉摸。文献中较少关注的因素之一是视觉图像中呈现的模糊量，例如，当使用头戴式显示器（HMD）时。本文分析了视觉模糊、景深和运动模糊对动态视觉系统中距离和速度估计的影响。我们进行了三个心理物理实验，在这些实验中，我们比较了现实世界和具有不同景深或运动模糊水平的虚拟现实之间的距离或速度估计。我们的研究结果表明，添加到视觉刺激中的模糊量对距离和速度估计没有明显的影响，即使在显示高强度的模糊时也是如此。我们的研究结果表明，人类感知系统在提取深度和运动信息方面具有很强的能力，而不考虑模糊，这意味着模糊很可能被排除在视觉错觉效应的主要原因之外。
It is known for decades that users tend to significantly underestimate or overestimate distances or speed in immersive virtual environments (IVEs) compared to corresponding judgments in the real world. Although several factors have been identified in the past that could explain small portions of this effect, the main causes of these perceptual discrepancies still remain elusive. One of the factors that has received less attention in the literature is the amount of blur presented in the visual imagery, for example, when using a head-mounted display (HMD). In this paper, we analyze the impact of the visual blur effects depth-of-field and motion blur in terms of their effects on distance and speed estimation in IVEs. We conducted three psychophysical experiments in which we compared distance or speed estimation between the real world and IVEs with different levels of depth-of-field or motion blur. Our results indicate that the amount of blur added to the visual stimuli had no noticeable influence on distance and speed estimation even when high magnitudes of blur were shown. Our findings suggest that the human perceptual system is highly capable of extracting depth and motion information regardless of blur, and implies that blur can likely be ruled out as the main cause of these misperception effects in IVEs.