Shrinking Circles: Adaptation to Increased Curvature Gain in Redirected Walking
Shrinking Circles: Adaptation to Increased Curvature Gain in Redirected Walking
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DOI：
10.1109/tvcg.2019.2899228
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发表时间：
2019-02
影响因子：
5.2
通讯作者：
Luke Bölling;Niklas Stein;Frank Steinicke;M. Lappe
中科院分区：
文献类型：
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作者：
Luke Bölling;Niklas Stein;Frank Steinicke;M. Lappe
真实的行走是虚拟现实（VR）中最自然的行走方式，但受限的物理行走空间限制了其适用性。重定向行走（RDW）是解决这个问题的一系列技术。这些技术中的一种旨在不可察觉地旋转用户对虚拟场景的视图，以便使她沿着受限路径转向，同时给出在大的虚拟空间中直线行走的印象。用于检测这种修改的曲率增益的感知阈值的测量已经指示了仍然大于大多数房间大小的半径。由于大脑是一个自适应系统，阈值通常取决于以前的刺激，我们测试了长时间暴露于具有增加的曲率增益的沉浸式虚拟环境（IVE）是否会产生对该增益的适应并修改阈值，以便随着时间的推移，可以将更大的曲率增益应用于RDW。因此，参与者首先完成了曲率增益的感知阈值的测量。在第二次会议中，相同的参与者暴露于具有恒定曲率增益的IVE，其中他们在两个目标之间行走约20分钟。之后，再次测量他们的感知阈值。结果表明，心理测量曲线移动后曝光会议和知觉阈值增加曲率增益进一步增加。检测阈值的增加表明，参与者适应的操纵和更强的曲率增益可以应用于RDW，因此提高了其在这种情况下的适用性。
Real walking is the most natural way to locomote in virtual reality (VR), but a confined physical walking space limits its applicability. Redirected walking (RDW) is a collection of techniques to solve this problem. One of these techniques aims to imperceptibly rotate the user's view of the virtual scene in order to steer her along a confined path whilst giving the impression of walking in a straight line in a large virtual space. Measurement of perceptual thresholds for the detection of such a modified curvature gain have indicated a radius that is still larger than most room sizes. Since the brain is an adaptive system and thresholds usually depend on previous stimulations, we tested if prolonged exposure to an immersive virtual environment (IVE) with increased curvature gain produces adaptation to that gain and modifies thresholds such that, over time, larger curvature gains can be applied for RDW. Therefore, participants first completed a measurement of their perceptual threshold for curvature gain. In a second session, the same participants were exposed to an IVE with a constant curvature gain in which they walked between two targets for about 20 minutes. Afterwards, their perceptual thresholds were measured again. The results show that the psychometric curves shifted after the exposure session and perceptual thresholds for increased curvature gain further increased. The increase of the detection threshold suggests that participants adapt to the manipulation and stronger curvature gains can be applied in RDW, and therefore improves its applicability in such situations.