Physically Based Real‐Time Rendering of Teeth and Partial Restorations,Computer Graphics Forum

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Physically Based Real‐Time Rendering of Teeth and Partial Restorations
Computer Graphics Forum ( IF 2.7 ) Pub Date : 2019-05-15 , DOI: 10.1111/cgf.13665
M. Reischl ₁ , E. Derzapf ₂ , M. Guthe ₁

Affiliation

Visually accurate real‐time rendering of teeth has many applications ranging from computer games to dental computer aided design (CAD). Similar to skin, the realistic and physically correct appearance of teeth cannot be achieved by simply using opaque diffuse textures, mainly because of the subsurface scattering behaviours of both. While both have a layered structure in common, the scattering characteristics of the teeth layers are drastically different from those of the skin, making rendering much more complicated. We present an approach which uses the Henyey–Greenstein scattering to achieve a near realistic real‐time rendering of human teeth. To simulate the multi‐layered geometry of teeth, we use standardized teeth models with dentin cores and fit them to real scanned teeth or dental restorations. By using a proxy geometry to compute the scattering, we can also render partial restorations as they would look like when attached to the remaining teeth. Finally, we compare our results to the VITA shade systems and human teeth to evaluate the visual fidelity of our approach.

中文翻译：

基于物理的牙齿和部分修复的实时渲染

视觉上准确的牙齿实时渲染具有许多应用，从计算机游戏到牙科计算机辅助设计 (CAD)。与皮肤类似，简单地使用不透明的漫反射纹理无法实现逼真且物理上正确的牙齿外观，这主要是因为两者的次表面散射行为。虽然两者都具有共同的分层结构，但牙齿层的散射特性与皮肤的散射特性截然不同，使得渲染更加复杂。我们提出了一种方法，该方法使用 Henyey-Greenstein 散射来实现近乎逼真的人类牙齿实时渲染。为了模拟牙齿的多层几何形状，我们使用带有牙本质核的标准化牙齿模型，并将它们安装到真实扫描的牙齿或牙齿修复体上。通过使用代理几何来计算散射，我们还可以渲染部分修复体，就像它们连接到剩余牙齿时的样子。最后，我们将我们的结果与 VITA 阴影系统和人类牙齿进行比较，以评估我们方法的视觉保真度。

更新日期：2019-05-15

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