Iridescent Water Droplets Beyond Mie Scattering
Iridescent Water Droplets Beyond Mie Scattering
复制标题
超越米氏散射的虹彩水滴
DOI：
10.1111/cgf.14893
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发表时间：
2023
影响因子：
2.5
通讯作者：
Marschner, Steve
中科院分区：
文献类型：
--
作者：
Xia, Mengqi;Walter, Bruce;Marschner, Steve
看着一杯热茶，观察者可以看到水面和蒸汽中的颜色图案和颗粒纹理。受此示例的启发，我们模拟了彩虹色水滴的外观。米氏散射描述了单个球形粒子对光波的散射，是这两种效应的基础，但我们表明，为了忠实地再现外观，还必须考虑其他机制。水面上的彩虹色是由悬浮在水面上方的水滴引起的，水滴散射的光与水面反射的光之间的干涉（称为克特莱散射）对于产生颜色至关重要。我们提出了一种计算机图形学的新模型来渲染这种现象，并根据照片进行验证。对于虹彩蒸汽，我们表明液滴尺寸的变化对于特征颜色图案至关重要。我们构建了一个液滴生长模型，并将其作为后处理步骤应用于现有的计算机图形流体模拟，以计算用于渲染的粒子集合。我们通过使光线与粒子轨迹相交，沿着观察光线混合贡献，显着加速了具有运动模糊的稀疏粒子的渲染。我们的模型再现了与蒸汽流相关的独特颜色图案。对于这两种效果，我们实例化单个液滴并显式渲染它们，因为液滴的粒度在现实中很容易观察到，并证明仅靠米氏散射无法再现视觉外观。
Looking at a cup of hot tea, an observer can see color patterns and granular textures both on the water surface and in the steam. Motivated by this example, we model the appearance of iridescent water droplets. Mie scattering describes the scattering of light waves by individual spherical particles and is the building block for both effects, but we show that other mechanisms must also be considered in order to faithfully reproduce the appearance. Iridescence on the water surface is caused by droplets levitating above the surface, and interference between light scattered by drops and reflected by the water surface, known as Quetelet scattering, is essential to producing the color. We propose a model, new to computer graphics, for rendering this phenomenon, which we validate against photographs. For iridescent steam, we show that variation in droplet size is essential to the characteristic color patterns. We build a droplet growth model and apply it as a post‐processing step to an existing computer graphics fluid simulation to compute collections of particles for rendering. We significantly accelerate the rendering of sparse particles with motion blur by intersecting rays with particle trajectories, blending contributions along viewing rays. Our model reproduces the distinctive color patterns correlated with the steam flow. For both effects, we instantiate individual droplets and render them explicitly, since the granularity of droplets is readily observed in reality, and demonstrate that Mie scattering alone cannot reproduce the visual appearance.
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影响因子：
1.3
作者：
Fedorets, AA
通讯作者：
Fedorets, AA
稀疏地撒有球体的基底的光反射 - 与椭偏实验的比较
DOI：
--
发表时间：
1986
期刊：
影响因子：
--
作者：
Pa Peter Bobbert;J. Vlieger;R. Greef
通讯作者：
R. Greef
DOI：
10.1145/3414685.3417841
发表时间：
2020-11
期刊：
ACM Transactions on Graphics (TOG)
影响因子：
--
作者：
Mengqi Xia;B. Walter;E. Michielssen;D. Bindel;Steve Marschner
通讯作者：
Mengqi Xia;B. Walter;E. Michielssen;D. Bindel;Steve Marschner
DOI：
10.1145/3528223.3530119
发表时间：
2022-07
期刊：
ACM Transactions on Graphics (TOG)
影响因子：
--
作者：
Shlomi Steinberg;P. Sen;Ling-Qi Yan
通讯作者：
Shlomi Steinberg;P. Sen;Ling-Qi Yan
DOI：
10.1145/3197517.3201351
发表时间：
2018-07
期刊：
ACM Transactions on Graphics (TOG)
影响因子：
--
作者：
Ling-Qi Yan;Miloš Hašan;B. Walter;Steve Marschner;R. Ramamoorthi
通讯作者：
Ling-Qi Yan;Miloš Hašan;B. Walter;Steve Marschner;R. Ramamoorthi