Visual Motion and the Perception of Surface Material
Visual Motion and the Perception of Surface Material
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DOI：
10.1016/j.cub.2011.10.036
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发表时间：
2011-12-06
期刊：
影响因子：
9.2
通讯作者：
Kersten, Daniel
中科院分区：
文献类型：
--
作者：
Doerschner, Katja;Fleming, Roland W.;Kersten, Daniel
许多重要的感知判断，从判断水果是否成熟到判断地面是否滑，都涉及到对表面材料特性的估计。人们对大脑如何识别物质知之甚少，尽管这个问题对生存来说可能和导航或识别物体一样重要。虽然以前的研究几乎只关注静态图像的特性[1-16]，但最近的证据表明，运动可能会影响表面材料的外观[17-19]。然而，运动传递了什么样的信息，以及这些信息如何被大脑使用，仍然是未知的。在这里，我们确定了三种运动线索，大脑可以依靠它们来区分哑光和闪亮的表面。我们表明，这些运动测量可以覆盖静态线索，导致感知材料根据图像运动特性发生巨大变化。基于这些线索的分类器算法正确地预测了人类材料感知的成功和一些惊人的失败。综上所述，这些结果揭示了光流在表面材料特性感知中的一个以前未知的用途。
Many critical perceptual judgments, from telling whether fruit is ripe to determining whether the ground is slippery, involve estimating the material properties of surfaces. Very little is known about how the brain recognizes materials, even though the problem is likely as important for survival as navigating or recognizing objects. Though previous research has focused nearly exclusively on the properties of static images [1-16], recent evidence suggests that motion may affect the appearance of surface material [17-19]. However, what kind of information motion conveys and how this information may be used by the brain is still unknown. Here, we identify three motion cues that the brain could rely on to distinguish between matte and shiny surfaces. We show that these motion measurements can override static cues, leading to dramatic changes in perceived material depending on the image motion characteristics. A classifier algorithm based on these cues correctly predicts both successes and some striking failures of human material perception. Together these results reveal a previously unknown use for optic flow in the perception of surface material properties.