Simulation of sparkling and depth effect in paints
Simulation of sparkling and depth effect in paints
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DOI：
10.1145/984952.984983
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发表时间：
2003-04
期刊：
影响因子：
--
通讯作者：
R. Durikovic;W. Martens
中科院分区：
文献类型：
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作者：
R. Durikovic;W. Martens
这篇论文报告了我们试图模拟与含有金属薄片的油漆涂层相关的具有闪闪发光和深度效果的表面的光反射。该方法的新颖之处在于明确地建模了用于渲染图形对象表面的闪烁几何。金属薄片或颗粒系统内的光散射在高强度颗粒周围的径向光条纹中产生闪闪发光和眩光效果。模拟薄片的3D几何形状创造了一种依赖于视角的反射模式，使表面在立体显示器中为每只眼睛呈现的两幅图像中看起来不同。然后将基于3D几何的渲染结果与使用2D随机点模式渲染的表面进行比较，后者不提供表面深度变化的线索。三维物体的立体显示使用和不使用基于三维几何的表面渲染来验证与两种情况相关的感知深度效果的差异。为了确认该技术的适用性，我们采用了涂料设计师常用的标准测试方法，在银板上观察具有不同闪光密度的涂料的外观。结果表明，在不同统计分布下，平板上的火花具有典型的变化，证实了三维火花建模系统的鲁棒性。在最后的应用测试中，这项技术被用来模拟一种昂贵的日本漆器的外观，这种漆器是用纳士基技术制作的。
This paper reports on our attempts to simulate light reflection from surfaces that exhibit sparkling and depth effects that are associated with paint coatings containing metallic flakes. The novelty of the approach is to explicitly model the sparkle geometry for rendering the surface of a graphic object. The light scattering within the system of metal flakes or particles creates the sparkling and glare effects with radial streaks of light around high intensity particles. The 3D geometry of the simulated flakes creates a view-dependent reflectance pattern that makes the surface appear differently in the two images rendered for each eye's view in a stereoscopic display. The results of 3D geometry-based rendering are then compared to the surfaces rendered using 2D random dot patterns that provide no cues to depth variation at the surface. Stereoscopic display of 3D objects with and without the 3D geometry-based surface rendering was used to validate the difference in perceived depth effects associated with the two cases. To confirm the applicability of the technique, we adopted a standard test in common use by paint designers in which the appearance of paints with different sparkle density is observed on silver plates. Our results showed typical variation in sparkling on plates with different statistical distributions of sparkles, which confirmed the robustness of the 3D sparkle modeling system. In a final application test, the technique was used to simulate the appearance of an expensive variety of Japanese lacquerware made using the nashiji technique.