Like a Rolling Stone: Effects of Space Deformation During Linear Acceleration on Slope Perception and Cybersickness
Like a Rolling Stone: Effects of Space Deformation During Linear Acceleration on Slope Perception and Cybersickness
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DOI：
10.1109/vr55154.2023.00081
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
Tongyu Nie;I. Adhanom;Evan Suma Rosenberg
中科院分区：
文献类型：
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作者：
Tongyu Nie;I. Adhanom;Evan Suma Rosenberg
在虚拟现实中，光学信息和惯性信息之间的解耦关系被公认为是导致晕机的主要因素。根据物理定律，我们注意到斜坡自然会提供加速度，当我们在斜坡上自由加速时，我们所经历的重力惯性力与我们站在地面上时所经历的重力具有相同的相对方向和大致相同的大小。这提供了通过利用加速光流相应地操纵虚拟对象的取向来模拟斜坡的机会。在本文中，我们提出了一种新的空间变形技术，变形的虚拟环境中复制的斜坡结构时，用户加速虚拟。因此，我们可以恢复用户可用的光学和惯性信息之间的物理关系。然而，在空间变形期间对虚拟环境的几何形状的改变仍然是用户可感知的。因此，我们创建了两种不同的过渡效果，捏和倾斜，这提供了不同的地面弯曲的视觉体验。进行了一项人类受试者研究（N=87），以评估空间变形对坡度感知和电脑病的影响。结果证实，所提出的技术创造了一个强烈的感觉，在斜坡上旅行，但没有显着差异的不适和晕机的措施。
The decoupled relationship between the optical and inertial information in virtual reality is commonly acknowledged as a major factor contributing to cybersickness. Based on laws of physics, we noticed that a slope naturally affords acceleration, and the gravito-inertial force we experience when we are accelerating freely on a slope has the same relative direction and approximately the same magnitude as the gravity we experience when standing on the ground. This provides the opportunity to simulate a slope by manipulating the orientation of virtual objects accordingly with the accelerating optical flow. In this paper, we present a novel space deformation technique that deforms the virtual environment to replicate the structure of a slope when the user accelerates virtually. As a result, we can restore the physical relationship between the optical and inertial information available to the user. However, the changes to the geometry of the virtual environment during space deformation remain perceptible to users. Consequently, we created two different transition effects, pinch and tilt, which provide different visual experiences of ground bending. A human subject study (N=87) was conducted to evaluate the effects of space deformation on both slope perception and cyber-sickness. The results confirmed that the proposed technique created a strong feeling of traveling on a slope, but no significant differences were found on measures of discomfort and cybersickness.