4D Gaussian Splatting for Real-Time Dynamic Scene Rendering

TL;DR

This paper introduces 4D Gaussian Splatting, a novel holistic representation for dynamic scenes that enables real-time rendering with high efficiency and quality, outperforming previous methods.

Contribution

The paper proposes 4D Gaussian Splatting, combining 3D Gaussians and 4D neural voxels, with a new encoding algorithm for efficient dynamic scene rendering.

Findings

Achieves 82 FPS at 800x800 resolution on RTX 3090

Maintains high rendering quality comparable or superior to state-of-the-art methods

Enables real-time dynamic scene rendering with high efficiency

Abstract

Representing and rendering dynamic scenes has been an important but challenging task. Especially, to accurately model complex motions, high efficiency is usually hard to guarantee. To achieve real-time dynamic scene rendering while also enjoying high training and storage efficiency, we propose 4D Gaussian Splatting (4D-GS) as a holistic representation for dynamic scenes rather than applying 3D-GS for each individual frame. In 4D-GS, a novel explicit representation containing both 3D Gaussians and 4D neural voxels is proposed. A decomposed neural voxel encoding algorithm inspired by HexPlane is proposed to efficiently build Gaussian features from 4D neural voxels and then a lightweight MLP is applied to predict Gaussian deformations at novel timestamps. Our 4D-GS method achieves real-time rendering under high resolutions, 82 FPS at an 800$\times$800 resolution on an RTX 3090 GPU while maintaining comparable or better quality than previous state-of-the-art methods. More demos and code are available at https://guanjunwu.github.io/4dgs/.