Material surface properties modulate vection strength
Material surface properties modulate vection strength
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DOI：
10.1007/s00221-019-05620-0
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发表时间：
2019-10-01
影响因子：
2
通讯作者：
Seno, Takeharu
中科院分区：
文献类型：
--
作者：
Morimoto, Yuki;Sato, Hirotaro;Seno, Takeharu
众所周知，视野中的真实外观和复杂性会影响矢量（视觉诱导的自运动感知）的强度。因此，尽管材料的表面特性被认为是影响矢量的视觉特征，但迄今为止，结果好坏参半。在这里，我们使用计算机图形学来模拟通过由九种不同材料（树皮、陶瓷、织物、毛皮、玻璃、皮革、金属、石头和木材）构建的渲染 3D 隧道的自我运动。新刺激与之前研究中发现的刺激相比，存在三种变化：(1) 当它们移动时，它们的外观会随着模拟世界的 3D 结构交互变化，所有灯光效果和 3D 几何外观也是如此，(2) 它们是彩色的，(3) 它们的组件覆盖了大部分视野。每个隧道的整个内表面均由九种材料中的一种组成，当观察者虚拟地穿过隧道时会引发光流。树皮、织物、皮革、石头和木材有效地诱导了强对流，而陶瓷、玻璃、毛皮和金属却没有。回归分析表明，诸如光照和空间频率幅度等低级图像特征是调制矢量强度的主要因素。此外，九种表面材料的主观印象表明，感知的深度、光滑度和刚性与感知的矢量强度相关。总的来说，我们的结果表明材料的表面特性确实调节矢量强度。
Realistic appearance and complexity in the visual field are known to affect the strength of vection (visually induced self-motion perception). Although surface properties of materials are, therefore, expected to be visual features that influence vection, to date, the results have been mixed. Here, we used computer graphics to simulate self-motion through rendered 3D tunnels constructed from nine different materials (bark, ceramic, fabric, fur, glass, leather, metal, stone, and wood). There are three ways in which the new stimuli are changed from those found in previous studies: (1) as they move, their appearances interactively change with the 3D structures of the simulated world, as do all the lighting effects and 3D geometric appearances, (2) they are colored, (3) and their components covered a large portion of the visual field. The entire inner surface of each tunnel was composed from one of the nine materials, and optic flow was evoked when an observer virtually moved through the tunnel. Bark, fabric, leather, stone, and wood effectively induced strong vection, whereas, ceramic, glass, fur, and metal did not. Regression analyses suggested that low-level image features such as the lighting and amplitude of spatial frequency were the main factors that modulated vection strength. Additionally, subjective impressions of the nine surface materials showed that the perceived depth, smoothness, and rigidity were related to the perceived vection strength. Overall, our results indicate that surface properties of materials do indeed modulate vection strength.