Statistical correlates of perceived gloss in natural images
Statistical correlates of perceived gloss in natural images
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DOI：
10.1016/j.visres.2015.04.010
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发表时间：
2015-10-01
期刊：
影响因子：
1.8
通讯作者：
Gegenfurtner, Karl R.
中科院分区：
文献类型：
--
作者：
Wiebel, Christiane B.;Toscani, Matteo;Gegenfurtner, Karl R.
目前有争议的是，光泽度的感知是否与视网膜图像的统计参数有关。特别是，已经提出光泽与亮度直方图的偏斜度高度相关。然而，其他用人工刺激进行的心理物理研究表明，仅靠歪斜并不足以引起对光泽的感知。在这里，我们分析了许多自然表面的图像，以寻找感知光泽度的潜在统计相关性。我们发现，在使用渲染刺激时，偏斜度确实与光泽度相关，但当使用自然表面的照片时，标准偏差(衡量对比度的指标)与感知光泽度的相关性更好。我们通过操纵图像中的偏斜度和对比度来验证对比度的重要作用。改变图像中的对比度会显著调整感知的光泽度，但操纵亮度直方图的偏斜度只会产生很小的影响。(C)2015爱思唯尔有限公司。保留所有权利。
It is currently debated whether the perception of gloss is linked to the statistical parameters of the retinal image. In particular, it has been suggested that gloss is highly correlated with the skewness of the luminance histogram. However, other psychophysical work with artificial stimuli has shown that skewness alone is not enough to induce the perception of gloss. Here, we analyzed many images of natural surfaces to search for potential statistical correlates of perceived gloss. We found that skewness indeed correlates with gloss when using rendered stimuli, but that the standard deviation, a measure of contrast, correlates better with perceived gloss when using photographs of natural surfaces. We verified the important role of contrast by manipulating skewness and contrast within images. Changing the contrast in images significantly modulates perceived gloss, but manipulating the skewness of the luminance histogram had only a small effect. (C) 2015 Elsevier Ltd. All rights reserved.