DN-Splatter: Depth and Normal Priors for Gaussian Splatting and Meshing

TL;DR

This paper enhances 3D Gaussian splatting for indoor scene reconstruction by incorporating depth and normal priors, leading to more accurate geometry and mesh extraction, especially in challenging, textureless environments.

Contribution

It introduces depth and normal priors into Gaussian splatting optimization, improving indoor scene reconstruction and enabling direct mesh extraction.

Findings

Improved depth estimation and view synthesis results.

Enhanced mesh extraction quality.

Better alignment with true scene geometry.

Abstract

High-fidelity 3D reconstruction of common indoor scenes is crucial for VR and AR applications. 3D Gaussian splatting, a novel differentiable rendering technique, has achieved state-of-the-art novel view synthesis results with high rendering speeds and relatively low training times. However, its performance on scenes commonly seen in indoor datasets is poor due to the lack of geometric constraints during optimization. In this work, we explore the use of readily accessible geometric cues to enhance Gaussian splatting optimization in challenging, ill-posed, and textureless scenes. We extend 3D Gaussian splatting with depth and normal cues to tackle challenging indoor datasets and showcase techniques for efficient mesh extraction. Specifically, we regularize the optimization procedure with depth information, enforce local smoothness of nearby Gaussians, and use off-the-shelf monocular networks to achieve better alignment with the true scene geometry. We propose an adaptive depth loss based on the gradient of color images, improving depth estimation and novel view synthesis results over various baselines. Our simple yet effective regularization technique enables direct mesh extraction from the Gaussian representation, yielding more physically accurate reconstructions of indoor scenes.