用于体三维重建的辐射网格
Radiance Meshes for Volumetric Reconstruction
用 Delaunay 四面体剖分构建常密度辐射场，使体渲染方程可被光栅化硬件精确求值，为实时新视角合成提供了一条比高斯泼溅更贴近图形管线、且可直接导出网格与支持物理仿真的表示路线。
原文依据 our model is able to perform exact and fast volume rendering using both rasterization and ray-tracing
摘要译文
由模型翻译 · 术语统一 · 请对照原文核对关键结论我们提出辐射网格（Radiance Meshes），用 Delaunay 四面体剖分生成的常密度四面体单元来表示辐射场。与 Voronoi 图不同，Delaunay 四面体剖分产生的是现有硬件原生支持的简单三角形。因此，我们的模型能够同时借助光栅化和光线追踪执行精确且快速的体渲染。我们提出一种新的光栅化方法，在多种平台上（在基元数量与分辨率相当的条件下）取得了比所有已有辐射场表示更快的渲染速度。优化 Delaunay 顶点的位置会引入拓扑不连续（边翻转）。为解决这一问题，我们采用 Zip-NeRF 风格的骨干网络，使我们在拓扑发生变化时仍能表达平滑变化的场。我们的渲染方法精确求解体渲染方程，并能在标准消费级硬件上实现高质量、实时的新视角合成。我们的四面体网格还适用于多种有前景的应用，包括鱼眼镜头畸变、基于物理的仿真、编辑以及网格提取。
英文原文摘要 1155 字符
We introduce Radiance Meshes for representing radiance fields with constant density tetrahedral cells produced with a Delaunay tetrahedralization.Unlike a Voronoi diagram, a Delaunay tetrahedralization yields simple triangles that are natively supported by existing hardware. As such, our model is able to perform exact and fast volume rendering using both rasterization and ray-tracing. We introduce a new rasterization method that achieve faster rendering speeds than all prior radiance field representations (assuming an equivalent number of primitives and resolution) across a variety of platforms.Optimizing the positions of Delaunay vertices introduces topological discontinuities (edge flips). To solve this, we use a Zip-NeRF-style backbone which allows us to express a smoothly varying field even when the topology changes.Our rendering method exactly evaluates the volume rendering equation and enables high quality, real-time view synthesis on standard consumer hardware. Our tetrahedral meshes also lend themselves to a variety of exciting applications including fisheye lens distortion, physics-based simulation, editing, and mesh extraction.