亚表面散射在光泽度感知中的作用

Davit Gigilashvili, Weiqi Shi, Zeyu Wang, Marius Pedersen, J. Hardeberg, H. Rushmeier
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引用次数: 9

摘要

本研究探讨了亚表面光传输对光泽度感知的潜在影响,旨在拓宽我们对计算机图形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影响了光泽度的感知。然而,光泽度传统上是作为一种与表面相关的质量来研究的,尽管光泽度的视觉线索也会受到光传输的影响,但最新的研究结果通常是基于完全不透明的材料。为了解决这一差距并验证我们的假设,我们进行了心理物理实验,发现受试者能够分辨出表面下光传输不同但表面质量和物体形状相同的刺激之间的光泽差异。这给了我们一个明确的指示,地下光传输有助于光滑的外观。此外,我们进行了额外的实验,发现亚表面散射对光泽的贡献在不同的形状和表面粗糙度水平上是不同的。我们认为,未来对光泽度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的更一般的感知模型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Role of Subsurface Scattering in Glossiness Perception
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.
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