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Back to reality: transition techniques from short HMD-based virtual experiences to the physical world
Multimedia Tools and Applications ( IF 3.0 ) Pub Date : 2021-08-02 , DOI: 10.1007/s11042-021-11317-w
Robin Horst 1 , Ramtin Naraghi-Taghi-Off 1 , Linda Rau 1 , Ralf Dörner 1
Affiliation  

Every Virtual Reality (VR) experience has to end at some point. While there already exist concepts to design transitions for users to enter a virtual world, their return from the physical world should be considered, as well, as it is a part of the overall VR experience. We call the latter outro-transitions. In contrast to offboarding of VR experiences, that takes place after taking off VR hardware (e.g., HMDs), outro-transitions are still part of the immersive experience. Such transitions occur more frequently when VR is experienced periodically and for only short times. One example where transition techniques are necessary is in an auditorium where the audience has individual VR headsets available, for example, in a presentation using PowerPoint slides together with brief VR experiences sprinkled between the slides. The audience must put on and take off HMDs frequently every time they switch from common presentation media to VR and back. In a such a one-to-many VR scenario, it is challenging for presenters to explore the process of multiple people coming back from the virtual to the physical world at once. Direct communication may be constrained while VR users are wearing an HMD. Presenters need a tool to indicate them to stop the VR session and switch back to the slide presentation. Virtual visual cues can help presenters or other external entities (e.g., automated/scripted events) to request VR users to end a VR session. Such transitions become part of the overall experience of the audience and thus must be considered. This paper explores visual cues as outro-transitions from a virtual world back to the physical world and their utility to enable presenters to request VR users to end a VR session. We propose and investigate eight transition techniques. We focus on their usage in short consecutive VR experiences and include both established and novel techniques. The transition techniques are evaluated within a user study to draw conclusions on the effects of outro-transitions on the overall experience and presence of participants. We also take into account how long an outro-transition may take and how comfortable our participants perceived the proposed techniques. The study points out that they preferred non-interactive outro-transitions over interactive ones, except for a transition that allowed VR users to communicate with presenters. Furthermore, we explore the presenter-VR user relation within a presentation scenario that uses short VR experiences. The study indicates involving presenters that can stop a VR session was not only negligible but preferred by our participants.



中文翻译:

回到现实:从基于 HMD 的简短虚拟体验到物理世界的过渡技术

每个虚拟现实 (VR) 体验都必须在某个时刻结束。虽然已经存在设计用户进入虚拟世界的过渡的概念,但也应该考虑他们从物理世界的回归,因为它是整体 VR 体验的一部分。我们称后者为outro-transition. 与 VR 体验的脱离(发生在取下 VR 硬件(例如,HMD)之后)相比,outro-transitions 仍然是沉浸式体验的一部分。当 VR 周期性地且仅持续很短的时间时,这种转换会更频繁地发生。需要过渡技术的一个例子是在观众有个人 VR 耳机可用的礼堂中,例如,在使用 PowerPoint 幻灯片的演示中以及在幻灯片之间散布的简短 VR 体验。观众每次从普通演示媒体切换到 VR 并返回时,都必须经常戴上和摘下 HMD。在这样一对多的 VR 场景中,演示者很难探索多人同时从虚拟世界回到现实世界的过程。当 VR 用户佩戴 HMD 时,直接交流可能会受到限制。演示者需要一个工具来指示他们停止 VR 会话并切换回幻灯片演示。虚拟视觉提示可以帮助演示者或其他外部实体(例如,自动/脚本事件)请求 VR 用户结束 VR 会话。这种转变成为观众整体体验的一部分,因此必须加以考虑。本文探讨了作为从虚拟世界到物理世界的过渡过渡的视觉线索,以及它们使演示者能够请求 VR 用户结束 VR 会话的效用。我们提出并研究了八种转换技术。我们专注于它们在短期连续 VR 体验中的使用,包括既定技术和新技术。转换技术在用户研究中进行评估,以得出关于 outro-transition 对参与者整体体验和存在的影响的结论。我们还考虑了 outro-transition 可能需要多长时间以及我们的参与者对所提议技术的感受程度。该研究指出,除了允许 VR 用户与演示者进行交流的过渡之外,他们更喜欢非交互式的 outro-transition 而不是交互式的 outro-transition。此外,我们在使用短 VR 体验的演示场景中探索演示者-VR 用户关系。该研究表明,涉及可以停止 VR 会话的演示者不仅可以忽略不计,而且还受到我们参与者的青睐。我们还考虑了 outro-transition 可能需要多长时间以及我们的参与者对所提议技术的感受程度。该研究指出,除了允许 VR 用户与演示者进行交流的过渡之外,他们更喜欢非交互式的 outro-transition 而不是交互式的 outro-transition。此外,我们在使用短 VR 体验的演示场景中探索演示者-VR 用户关系。该研究表明,涉及可以停止 VR 会话的演示者不仅可以忽略不计,而且还受到我们参与者的青睐。我们还考虑了 outro-transition 可能需要多长时间以及我们的参与者对所提议技术的感受程度。该研究指出,除了允许 VR 用户与演示者进行交流的过渡之外,他们更喜欢非交互式的 outro-transition 而不是交互式的 outro-transition。此外,我们在使用短 VR 体验的演示场景中探索演示者-VR 用户关系。该研究表明,涉及可以停止 VR 会话的演示者不仅可以忽略不计,而且还受到我们参与者的青睐。我们在使用短 VR 体验的演示场景中探索演示者-VR 用户关系。该研究表明,涉及可以停止 VR 会话的演示者不仅可以忽略不计,而且还受到我们参与者的青睐。我们在使用短 VR 体验的演示场景中探索演示者-VR 用户关系。该研究表明,涉及可以停止 VR 会话的演示者不仅可以忽略不计,而且还受到我们参与者的青睐。

更新日期:2021-08-02
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