Preprint
Oct 2026
Dyna3: VLM-Guided Training-Free 4D Reconstruction via Depth Foundation Models
The key insight is that DA3's cross-view features, though trained only for depth consistency, implicitly encode motion-discriminative signals when combined with best-match feature search across frames, which could enable much denser temporal sampling that prior methods cannot support.
Xin-Hao Xiang, Wei-Yang Li, Zhi-Jie Zheng et al.
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