AtomGS: Atomizing Gaussian Splatting for High-Fidelity Radiance Field

TL;DR

AtomGS introduces atomized Gaussian proliferation and geometry-guided optimization to improve 3D radiance field reconstruction, resulting in higher quality rendering, better geometry accuracy, and faster training compared to existing methods.

Contribution

The paper presents AtomGS, a novel approach that enhances Gaussian Splatting by atomizing Gaussians and incorporating geometry-aware optimization, addressing noise and blurriness issues.

Findings

Outperforms state-of-the-art in rendering quality

Achieves competitive geometry reconstruction accuracy

Significantly faster training speed

Abstract

3D Gaussian Splatting (3DGS) has recently advanced radiance field reconstruction by offering superior capabilities for novel view synthesis and real-time rendering speed. However, its strategy of blending optimization and adaptive density control might lead to sub-optimal results; it can sometimes yield noisy geometry and blurry artifacts due to prioritizing optimizing large Gaussians at the cost of adequately densifying smaller ones. To address this, we introduce AtomGS, consisting of Atomized Proliferation and Geometry-Guided Optimization. The Atomized Proliferation constrains ellipsoid Gaussians of various sizes into more uniform-sized Atom Gaussians. The strategy enhances the representation of areas with fine features by placing greater emphasis on densification in accordance with scene details. In addition, we proposed a Geometry-Guided Optimization approach that incorporates an Edge-Aware Normal Loss. This optimization method effectively smooths flat surfaces while preserving intricate details. Our evaluation shows that AtomGS outperforms existing state-of-the-art methods in rendering quality. Additionally, it achieves competitive accuracy in geometry reconstruction and offers a significant improvement in training speed over other SDF-based methods. More interactive demos can be found in our website (https://rongliu-leo.github.io/AtomGS/).