Modeling, understanding, and reconstructing the real world are crucial in XR/VR. Recently, 3D Gaussian Splatting (3D-GS) methods have shown remarkable success in modeling and understanding 3D scenes.
Similarly, various 4D representations have demonstrated the ability to capture the dynamics of the 4D world. However, there is a dearth of research focusing on segmentation within 4D representations.
In this paper, we propose to Segment Any 4D Gaussians (SA4D), the first framework to segment anything in the 4D digital world based on 4D Gaussians.
In SA4D, an efficient temporal identity feature field is introduced to handle Gaussian drifting, with the potential to learn precise identity feature from noisy and sparse input. Additionally, a 4D segmentation refinement process is proposed to remove artifacts.
Our SA4D achieves precise, high-quality segmentation within seconds in 4D Gaussians and shows the ability of removal, recoloring, composition and rendering high quality novel anything masks.