论文标题
基于物理的逆渲染使用隐式和显式几何形状
Physics-Based Inverse Rendering using Combined Implicit and Explicit Geometries
论文作者
论文摘要
在数学上表示对象的形状是解决反向渲染问题的关键要素。诸如网格之类的明确表示可以有效地以可不同的方式渲染，但很难处理拓扑变化。另一方面，诸如签名距离函数之类的隐性表示可以更好地支持拓扑变化，但对于基于物理的可区分渲染而言，更难使用。我们引入了一种新的基于物理的反向渲染管道，该管道使用隐式表示和明确表示。我们的技术通过支持拓扑变化和复杂效果的可区分渲染（例如环境照明，柔和的阴影和反射），从而享有这两种表示的好处。我们使用几个合成和真实的例子来证明我们技术的有效性。
Mathematically representing the shape of an object is a key ingredient for solving inverse rendering problems. Explicit representations like meshes are efficient to render in a differentiable fashion but have difficulties handling topology changes. Implicit representations like signed-distance functions, on the other hand, offer better support of topology changes but are much more difficult to use for physics-based differentiable rendering. We introduce a new physics-based inverse rendering pipeline that uses both implicit and explicit representations. Our technique enjoys the benefit of both representations by supporting both topology changes and differentiable rendering of complex effects such as environmental illumination, soft shadows, and interreflection. We demonstrate the effectiveness of our technique using several synthetic and real examples.
