G3T Project Page: Gravity-Aligned Pointmaps Beat Camera-Centric Frames Versus VGGT
rsasaki0109 · x · 2026-10-04
The G3T project page by Bharath Raj Nagoor Kani and Noah Snavely (Cornell) details their gravity-aligned coordinate frame approach.
- Core idea: instead of camera-centric pointmaps, predict upright, gravity-aligned ones that exploit strong structural cues in real-world scenes
- Gravity-aligned frames share a common vertical axis across viewpoints, reducing rotational degrees of freedom needed to relate pointmaps
- G3T outputs upright pointmaps regardless of input orientation; G3T-Long leverages this for robust long-sequence 3D reconstruction
- Interactive comparisons on three self-captured scenes show G3T's horizontal surfaces at uniform height while VGGT's show tilt gradients
arXiv paper and code are linked.
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