Image statistics and the perception of surface gloss and lightness
Image statistics and the perception of surface gloss and lightness
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DOI：
10.1167/10.9.3
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发表时间：
2010-01-01
影响因子：
1.8
通讯作者：
Anderson, Barton L.
中科院分区：
文献类型：
--
作者：
Kim, Juno;Anderson, Barton L.
尽管以前的数据表明，在光泽度和亮度的感知三维表面几何形状的关键重要性，我。Motoyoshi，S.西田湖沙兰和E. H. Adelson（2007）最近提出，视觉系统计算一个简单的图像直方图或子带偏斜来推断表面的光泽和光泽度。支持这一说法的一个关键证据来源是一个实验，在这个实验中，对倾斜图像统计的适应导致了观察者对光泽度和亮度判断的相反后效。我们报告了一系列的适应实验，旨在评估这些后遗症的原因。我们复制了他们原来的光泽后效，但没有发现一致的亮度后效。我们报告说，适应零偏斜适配器产生类似的后效正偏斜适配器，负偏斜适配器诱导没有可靠的后效。我们进一步发现，正偏态适配器观察到的适应效果是不稳健的平均亮度的变化，减少亮度极值的强度。最后，我们表明，对正偏斜的适应会减少（而不是增加）非均匀反照率表面上光色素沉着的表观亮度。这些结果挑战了Motoyoshi等人（2007）报告的适应结果提供的证据表明偏斜是由视觉系统明确计算的观点。
Despite previous data demonstrating the critical importance of 3D surface geometry in the perception of gloss and lightness, I. Motoyoshi, S. Nishida, L. Sharan, and E. H. Adelson (2007) recently proposed that a simple image statistic-histogram or sub-band skew-is computed by the visual system to infer the gloss and albedo of surfaces. One key source of evidence used to support this claim was an experiment in which adaptation to skewed image statistics resulted in opponent aftereffects in observers' judgments of gloss and lightness. We report a series of adaptation experiments that were designed to assess the cause of these aftereffects. We replicated their original aftereffects in gloss but found no consistent aftereffect in lightness. We report that adaptation to zero-skew adaptors produced similar aftereffects as positively skewed adaptors, and that negatively skewed adaptors induced no reliable aftereffects. We further find that the adaptation effect observed with positively skewed adaptors is not robust to changes in mean luminance that diminish the intensity of the luminance extrema. Finally, we show that adaptation to positive skew reduces (rather than increases) the apparent lightness of light pigmentation on non-uniform albedo surfaces. These results challenge the view that the adaptation results reported by Motoyoshi et al. (2007) provide evidence that skew is explicitly computed by the visual system.