Wendt Gunnar, Faul Franz
Institut für Psychologie, Christian-Albrechts-Universität zu Kiel, Germany.
Iperception. 2018 Oct 10;9(5):2041669518803964. doi: 10.1177/2041669518803964. eCollection 2018 Sep-Oct.
Previous results suggest that the glossiness of a surface is systematically underestimated when adjacent highlights from different light sources overlap to such an extent that they appear as a single, expanded highlight. Here we investigated how the availability of color- and motion-induced information, which may help to unravel such merged highlights, affects gloss constancy. We used images of computer-generated scenes where a complex 3D object made of glossy material was illuminated by three point light sources, which had varying distances to each other. The point lights were either all achromatic or they differed clearly in their color and the test object was either presented statically or rotating. The subjects had to adjust the smoothness of a match object illuminated by a single achromatic point light so that it appeared to have the same glossiness as the test object. The results show that color information contributes to gloss constancy in this situation: If it was available, the perceived glossiness remained almost invariant with changes in the degree of overlap between the highlights. This suggests that highlights of different color are processed separately. Motion information had no such effect but only led to a general increase in perceived glossiness.
先前的研究结果表明，当来自不同光源的相邻高光重叠到一定程度，以至于它们看起来像是一个单一的、扩展的高光时，表面的光泽度会被系统性地低估。在此，我们研究了颜色和运动诱导信息（可能有助于解开这种合并的高光）的可用性如何影响光泽度恒常性。我们使用了计算机生成场景的图像，其中由光泽材料制成的复杂三维物体由三个点光源照亮，这些点光源彼此之间的距离各不相同。点光源要么全是无色的，要么在颜色上有明显差异，并且测试物体要么静态呈现，要么旋转。受试者必须调整由单个无色点光源照亮的匹配物体的平滑度，使其看起来与测试物体具有相同的光泽度。结果表明，在这种情况下颜色信息有助于光泽度恒常性：如果有颜色信息，随着高光之间重叠程度的变化，感知到的光泽度几乎保持不变。这表明不同颜色的高光被分别处理。运动信息没有这种效果，只是导致感知到的光泽度普遍增加。
