The Role of Subsurface Scattering in Glossiness Perception
The Role of Subsurface Scattering in Glossiness Perception
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DOI：
10.1145/3458438
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发表时间：
2021-07-01
影响因子：
1.6
通讯作者：
Rushmeier, Holly
中科院分区：
文献类型：
--
作者：
Gigilashvili, Davit;Shi, Weiqi;Rushmeier, Holly
本研究旨在探讨亚表面光传输对光泽感知的潜在影响，以扩大我们对计算机图形学应用中视觉外观的理解。光泽度是表征材料外观的重要属性。我们假设光的次表面散射会影响光泽度的感知。然而，传统上，光泽度被研究为与表面相关的质量，最先进的研究结果通常基于完全不透明的材料，尽管光泽度的视觉提示也会受到光传输的影响。为了解决这一差距并检验我们的假设，我们进行了心理物理实验，发现受试者能够区分不同表面光传输但具有相同表面质量和物体形状的刺激之间的光泽差异。这给了我们一个明确的迹象，即地下光传输有助于产生光泽。此外，我们还进行了额外的实验，发现次表面散射对光泽度的贡献因表面粗糙度形状和水平的不同而不同。我们认为，未来对光泽的研究应该包括透明和半透明介质，并将目前仅限于表面散射的感知模型扩展到包括亚表面光传输在内的更一般的模型。
This study investigates the potential impact of subsurface light transport on gloss perception for the purposes of broadening our understanding of visual appearance in computer graphics applications. Gloss is an important attribute for characterizing material appearance. We hypothesize that subsurface scattering of light impacts the glossiness perception. However, gloss has been traditionally studied as a surface-related quality and the findings in the state-of-the-art are usually based on fully opaque materials, although the visual cues of glossiness can be impacted by light transmission as well. To address this gap and to test our hypothesis, we conducted psychophysical experiments and found that subjects are able to tell the difference in terms of gloss between stimuli that differ in subsurface light transport but have identical surface qualities and object shape. This gives us a clear indication that subsurface light transport contributes to a glossy appearance. Furthermore, we conducted additional experiments and found that the contribution of subsurface scattering to gloss varies across different shapes and levels of surface roughness. We argue that future research on gloss should include transparent and translucent media and to extend the perceptual models currently limited to surface scattering to more general ones inclusive of subsurface light transport.