Perceptual Transparency From Cast Shadow
Perceptual Transparency From Cast Shadow
复制标题
投射阴影的感知透明度
DOI：
10.1177/2041669519844272
复制
发表时间：
2019
期刊：
影响因子：
1.9
通讯作者：
Takahiro Kawabe
中科院分区：
文献类型：
--
作者：
Takahiro Kawabe
这项研究考察了阴影如何影响对透明表面的感知。作为刺激，我们使用计算机图形图像，其中带有彩色马赛克图案的透明表面在背景表面上投射阴影。我们控制了两个参数：(a)透明表面透光率的空间异质性和(b)照射在透明表面上的光源及其背景的大小。后一个参数决定了阴影的模糊程度。观察者判断刺激图像是否包含透明表面。我们发现，报告中确定透明表面的比例取决于我们测试的两个参数。具体来说，高透射率的空间异质性降低了透明表面的报道比例；这可能是因为作为感知透明度线索之一的全局定义的x连接在感知上崩溃了。另一方面，即使全局x点无效，模糊阴影也有效。局部定义的x点仅对感知透明度有中等贡献。结果表明，除了全局和局部x点外，模糊阴影也是图像特征，从投射阴影中引出透明的感知。对于每个参与者使用哪些信息作为感知透明度的线索，还讨论了一个很大的个体差异。
This study examined how a shadow contributes to the perception of a transparent surface. As stimuli, we used computer graphics images in which a transparent surface with a color-mosaic pattern casts a shadow onto a background surface. We manipulated two parameters: (a) the spatial heterogeneity of the transmittance of the transparent surface and (b) the size of the light source shining on the transparent surface and its background. The latter parameter determined the blurriness of shadows. Observers judged whether the stimulus image contained a transparent surface or not. We found that the proportion of reports identifying a transparent surface was dependent on both parameters we tested. Specifically, a high spatial heterogeneity of transmittance decreased the proportion of reports of a transparent surface; this was possibly because globally defined X-junctions, which were one of the cues to perceptual transparency, perceptually broke down. On the other hand, blurred shadows were effective even when the global X-junctions were not effective. Locally defined X-junctions only moderately contributed to perceptual transparency. The results indicate that in addition to global and local X-junctions, blurred shadows are image features that elicit the perception of transparency from a cast shadow. A large individual difference as to which information each participant used as a cue to perceptual transparency was also discussed.
影响因子：
--
作者：
Takahiro Kawabe;K. Miura
通讯作者：
Takahiro Kawabe;K. Miura
DOI：
--
发表时间：
2005
期刊：
Vision Research 45
影响因子：
--
作者：
Kawabe;T.;Miura;K.
通讯作者：
K.