Modeling Uncertainty for Gaussian Splatting

We present stochastic Gaussian splatting (SGS): the first framework for uncertainty estimation using Gaussian splatting (GS). GS recently advanced the novel-view synthesis field by achieving impressive reconstruction quality at a fraction of the computational cost of neural radiance fields (NeRFs). However, contrary to the latter, it still lacks the ability to provide information about the confidence associated with their outputs. To address this limitation, in this brief, we introduce a variational inference (VI)-based approach that seamlessly integrates uncertainty prediction into the common rendering pipeline of GS. In addition, we introduce the area under sparsification error (AUSE) as a new term in the loss function, enabling optimization of uncertainty estimation alongside image reconstruction. Experimental results on the three different datasets demonstrate that our method outperforms existing approaches in terms of both image rendering quality and uncertainty estimation accuracy. Overall, our framework equips practitioners with valuable insights into the reliability of synthesized views, facilitating safer decision-making in real-world applications.