Don’t Block the Ground: Reducing Discomfort in Virtual Reality with an Asymmetric Field-of-View Restrictor
Don’t Block the Ground: Reducing Discomfort in Virtual Reality with an Asymmetric Field-of-View Restrictor
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不要挡住地面：使用不对称视场限制器减少虚拟现实中的不适
DOI：
10.1145/3485279.3485284
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Suma Rosenberg, Evan
中科院分区：
文献类型：
--
作者：
Wu, Fei;Bailey, George S;Stoffregen, Thomas;Suma Rosenberg, Evan
尽管虚拟现实越来越受欢迎，但用户在使用虚拟现实应用程序期间和之后仍然报告不适，许多人经历了与晕动病相关的症状。为了缓解这一问题，动态视场限制是一种在商业VR游戏中广泛应用的常见技术。虽然在运动过程中人为地减少视野可以提高舒适度，但标准的限制器通常使用一个对称的圆形掩模来阻挡视野外围的图像。这降低了用户对虚拟环境的可见性，并可能对他们的主观体验产生负面影响。在本文中，我们提出并评估了一种新的非对称视场限制器，它可以在运动过程中保持地平面的可见性。我们进行了一项远程用户研究，从VR耳机用户中抽取样本。实验采用被试内部设计，比较了地面可见限制器、传统对称限制器和无视场限制的控制条件。参与者需要在三个独立的虚拟现实会话中使用控制器在一个复杂的迷宫般的环境中导航，这些会话间隔至少24小时。结果表明，地面可视视场限制对用户的舒适度、姿势稳定性和主观存在感都有好处。此外，我们没有发现在视场限制期间保持地平面可见性的负面缺点的证据，这表明与广泛使用的对称限制器相比，所提出的技术对于经验丰富的用户来说是优越的。
Although virtual reality has been gaining in popularity, users continue to report discomfort during and after use of VR applications, and many experience symptoms associated with motion sickness. To mitigate this problem, dynamic field-of-view restriction is a common technique that has been widely implemented in commercial VR games. Although artificially reducing the field-of-view during movement can improve comfort, the standard restrictor is typically implemented using a symmetric circular mask that blocks imagery in the periphery of the visual field. This reduces users’ visibility of the virtual environment and can negatively impact their subjective experience. In this paper, we propose and evaluate a novel asymmetric field-of-view restrictor that maintains visibility of the ground plane during movement. We conducted a remote user study that sampled from the population of VR headset owners. The experiment used a within-subjects design that compared the ground-visible restrictor, the traditional symmetric restrictor, and a control condition without FOV restriction. Participation required navigating through a complex maze-like environment using a controller during three separate virtual reality sessions conducted at least 24 hours apart. Results showed that ground-visible FOV restriction offers benefits for user comfort, postural stability, and subjective sense of presence. Additionally, we found no evidence of negative drawbacks to maintaining visibility of the ground plane during FOV restriction, suggesting that the proposed technique is superior for experienced users compared to the widely used symmetric restrictor.
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