Density-aware NeRF Ensembles: Quantifying Predictive Uncertainty in Neural Radiance Fields

Niko Sünderhauf,Jad Abou-Chakra,Dimity Miller,Niko Sünderhauf,Jad Abou-Chakra,Dimity Miller

We show that ensembling effectively quantifies model uncertainty in Neural Radiance Fields (NeRFs) if a density-aware epistemic uncertainty term is considered. The naive ensembles investigated in prior work simply average rendered RGB images to quantify the model uncertainty caused by conflicting explanations of the observed scene. In contrast, we additionally consider the termination probabilitie...