7DGS: Unified Spatial-Temporal-Angular Gaussian Splatting
This addresses a fundamental challenge in computer graphics for applications requiring high-fidelity, real-time dynamic scene rendering, representing a novel integration rather than an incremental step.
The paper tackles the problem of real-time rendering of dynamic scenes with view-dependent effects by introducing 7D Gaussian Splatting, which unifies spatial, temporal, and angular dimensions, resulting in a 7.36 dB PSNR improvement and 401 FPS rendering.
Real-time rendering of dynamic scenes with view-dependent effects remains a fundamental challenge in computer graphics. While recent advances in Gaussian Splatting have shown promising results separately handling dynamic scenes (4DGS) and view-dependent effects (6DGS), no existing method unifies these capabilities while maintaining real-time performance. We present 7D Gaussian Splatting (7DGS), a unified framework representing scene elements as seven-dimensional Gaussians spanning position (3D), time (1D), and viewing direction (3D). Our key contribution is an efficient conditional slicing mechanism that transforms 7D Gaussians into view- and time-conditioned 3D Gaussians, maintaining compatibility with existing 3D Gaussian Splatting pipelines while enabling joint optimization. Experiments demonstrate that 7DGS outperforms prior methods by up to 7.36 dB in PSNR while achieving real-time rendering (401 FPS) on challenging dynamic scenes with complex view-dependent effects. The project page is: https://gaozhongpai.github.io/7dgs/.