MrNeRF (@janusch_patas)
2025-06-06 | โค๏ธ 1728 | ๐ 222
FreeTimeGS: Free Gaussians at Anytime and Anywhere for Dynamic Scene Reconstruction
Abstract: This paper addresses the challenge of reconstructing dynamic 3D scenes with complex motions. Recent works define 3D Gaussian primitives in the canonical space and use deformation fields to map these primitives to observation spaces, achieving real-time dynamic view synthesis. However, these methods often struggle with scenes that have complex motions due to the difficulty in optimizing deformation fields.
To overcome this problem, we propose FreeTimeGS, a novel 4D representation that allows Gaussian primitives to appear at arbitrary times and locations. Unlike canonical Gaussian primitives, our representation possesses strong flexibility, improving the ability to model dynamic 3D scenes. Additionally, we endow each Gaussian primitive with a motion function, allowing it to move to neighboring regions over time, which reduces temporal redundancy.
Experimental results on several datasets show that the rendering quality of our method outperforms recent methods by a large margin.
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