arXiv:2603.22036cs.CV2026-03

用双高斯模型重建半透明物体,兼顾表面与内部散射效果。

GTSR: Subsurface Scattering Awared 3D Gaussians for Translucent Surface Reconstruction

  • 采用表面与内部双高斯模型,分别建模反射与透射光。
  • 在NeuralTO Syn数据集上优于基线方法,实时渲染性能优异。
  • 支持多种材质,适合需要高效半透明建模的场景。

从多视角图像重建半透明物体是一项挑战。以往方法依赖可微路径追踪或神经隐式场,计算开销大。近期基于3D高斯溅射(3DGS)的方法在不透明物体重建中效率显著提升,但难以处理半透明物体,因其未考虑半透明材质的光学特性。本文提出一种新的3DGS框架(GTSR),用于重建半透明物体表面几何。GTSR引入两组高斯:表面高斯和内部高斯,分别用于建模表面反射与光线穿过物体时的散射颜色。为渲染半透明外观,提出使用菲涅尔项融合两组高斯。为进一步增强非轮廓区域的细节,引入迪士尼双向反射分布函数(Disney BSDF)结合延迟渲染,强化法向与深度约束。实验表明,该方法在NeuralTO Syn数据集上优于基线方法,并具备优异实时渲染能力。我们还扩展了数据集,加入具有不同材质属性的新半透明物体,验证了方法对多种材质的良好适应性。

原文摘要 · Abstract (English)

Reconstructing translucent objects from multi-view images is a difficult problem. Previously, researchers have used differentiable path tracing and the neural implicit field, which require relatively large computational costs. Recently, many works have achieved good reconstruction results for opaque objects based on a 3DGS pipeline with much higher efficiency. However, such methods have difficulty dealing with translucent objects, because they do not consider the optical properties of translucent objects. In this paper, we propose a novel 3DGS-based pipeline (GTSR) to reconstruct the surface geometry of translucent objects. GTSR combines two sets of Gaussians, surface and interior Gaussians, which are used to model the surface and scattering color when lights pass translucent objects. To render the appearance of translucent objects, we introduce a method that uses the Fresnel term to blend two sets of Gaussians. Furthermore, to improve the reconstructed details of non-contour areas, we introduce the Disney BSDF model with deferred rendering to enhance constraints of the normal and depth. Experimental results demonstrate that our method outperforms baseline reconstruction methods on the NeuralTO Syn dataset while showing great real-time rendering performance. We also extend the dataset with new translucent objects of varying material properties and demonstrate our method can adapt to different translucent materials.

三维重建半透明材质3D高斯实时渲染

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