GDGS: 3D Gaussian Splatting Via Geometry-Guided Initialization And Dynamic Density Control

TL;DR

This paper introduces GDGS, a novel 3D Gaussian Splatting method that uses geometry-guided initialization, surface-aligned optimization, and dynamic density control to improve real-time rendering quality and efficiency.

Contribution

The paper presents a new approach combining geometry-guided initialization, surface-aligned optimization, and adaptive density control for enhanced 3D Gaussian Splatting.

Findings

Achieves high-fidelity real-time rendering in complex scenes.

Outperforms state-of-the-art methods in visual quality.

Demonstrates faster convergence and better surface alignment.

Abstract

We propose a method to enhance 3D Gaussian Splatting (3DGS)~\cite{Kerbl2023}, addressing challenges in initialization, optimization, and density control. Gaussian Splatting is an alternative for rendering realistic images while supporting real-time performance, and it has gained popularity due to its explicit 3D Gaussian representation. However, 3DGS heavily depends on accurate initialization and faces difficulties in optimizing unstructured Gaussian distributions into ordered surfaces, with limited adaptive density control mechanism proposed so far. Our first key contribution is a geometry-guided initialization to predict Gaussian parameters, ensuring precise placement and faster convergence. We then introduce a surface-aligned optimization strategy to refine Gaussian placement, improving geometric accuracy and aligning with the surface normals of the scene. Finally, we present a dynamic adaptive density control mechanism that adjusts Gaussian density based on regional complexity, for visual fidelity. These innovations enable our method to achieve high-fidelity real-time rendering and significant improvements in visual quality, even in complex scenes. Our method demonstrates comparable or superior results to state-of-the-art methods, rendering high-fidelity images in real time.