Author

Lu Liu

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Preprint Sep 2026

VideoReloc: Long-Term Indoor Video Relocalization against a Kilobyte-Scale Semantic Scene Graph

This work introduces VideoReloc, whose adaptive clips use odometry to gather spatial evidence until object and motion criteria are met, adapting query length to the observed scene, and reframes sparse-map relocalization as verification of spatially extended video queries.

Qian-Ru Li, Xu-Yang Chen, Xu-Qin Wang et al. · 0 citations

Jul 2026

CinemaTraj: Composing Atomic Camera Trajectories for 3D Scenes with LLM Agents

CinemTraj is presented, a framework that reframes camera trajectory planning as a language-grounded spatial reasoning problem that produces prompt-faithful, collision-free trajectories with high cinematographic quality, outperforming existing approaches on prompt alignment, trajectory quality, and safety metrics.

Qian-Ru Li, Xu-Yang Chen, Erkin Türköz et al. · arXiv.org · 1 citation

#artificial intelligence Preprint Sep 2026

GraFT: A Training-Free Framework for Spatial Reasoning in Multimodal Large Language Models via 3D Scene Graphs

GraFT is introduced, a training-free framework that supplies the missing 3D structure through a compact, easily maintained 3D scene graph (3DSG) and provides three spatial reasoning capabilities: deterministic geometry through symbolic tools, allocentric layout through a bird's-eye-view (BEV) rendering, and visual-attr...

Jun Du, Fernando Ropero, Erkin Turkoz et al. · 0 citations