Perceived transparency of neutral density filters across dissimilar backgrounds.
Perceived transparency of neutral density filters across dissimilar backgrounds.
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不同背景下中性密度滤光片的感知透明度。
DOI：
10.1167/4.3.5
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发表时间：
2004
影响因子：
1.8
通讯作者：
Zaidi,Qasim
中科院分区：
文献类型：
--
作者：
Robilotto,Rocco;Zaidi,Qasim
我们研究了覆盖表面的亮度分布如何影响中性密度滤光片的透明度。在不同亮度分布的杂色背景上生成一对中性密度滤光片，观察者调整一个滤光片的单个参数，直到这对滤光片看起来相等透明。物理上相同的滤镜在相似的背景上看起来一样透明，但当背景的亮度或对比度不同时，看起来就不一样透明。降低背景的亮度或对比度会以倍增系数降低覆盖滤光片的感知透明度。观察者通过在反射率和内部透射率之间应用线性权衡来匹配物理上不同的滤镜的感知透明度。在第二个实验中，滤光片的空间结构发生了改变，以消除对透明度的感知，并表现为带有图案的不透明圆盘，观察者将两个重叠区域的感知对比度相等。匹配设置给出的结果与前面的实验类似，表明通常情况下，感知到的透明度与感知到的覆盖区域的对比度密切对应。
We examine how the luminance distributions of overlaid surfaces affect the perception of transparency of neutral density filters. Pairs of neutral density filters were generated overlying variegated backgrounds of varying luminance distributions, and observers adjusted a single parameter of one filter until the pair appeared equally transparent. Physically identical filters appeared equally transparent on similar backgrounds, but did not appear equally transparent when backgrounds differed in luminance or contrast. Reducing luminance or contrast of the background decreased perceived transparency of the overlaying filter by a multiplicative factor. Observers matched perceived transparency of physically dissimilar filters by applying a linear trade-off between reflectivity and inner transmittance. In a second experiment, filters had their spatial structure altered in order to abolish the perception of transparency and appeared as patterned opaque disks, and observers equated perceived contrast of the two overlaid areas. Match settings gave results similar to the previous experiment, indicating that, in general, perceived transparency corresponds closely to the perceived contrast of the overlaid region.