TROPHIES: Temporal Reconstruction of Places, Humans, and Cameras from Multi-view Videos

Jinpeng Liu; Yukang Xu; Yutong Li; Xingyu Liu

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arXiv · 2606.02350

TROPHIES: Temporal Reconstruction of Places, Humans, and Cameras from Multi-view Videos

Jinpeng Liu·Yukang Xu·Yutong Li·Xingyu Liu

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Abstract

Reconstructing humans and their surrounding environments in a globally consistent 4D space is essential for comprehensive perception. However, prior works typically assume single-view inputs or decouple humans, scenes, and cameras, making them unable to recover coherent geometry, stable motion, and physically aligned trajectories. These limitations motivate us to introduce a new task: unified human-scene-camera reconstruction from multi-view videos, which aims to jointly estimate dynamic humans, static scenes, and camera poses in one global coordinate frame. We propose TROPHIES--Temporal Reconstruction of Places, Humans, and Cameras from Multi-view Videos-a unified framework tailored for this task. TROPHIES features a Human Branch that models humans through temporal and spatial reasoning, and a Scene Branch that reconstructs static geometry with human-aware attention. A global alignment and optimization module couples both branches by enforcing scale consistency, contact priors, and cross-view temporal coherence. Experiments on EgoHuman and EgoExo4D demonstrate that TROPHIES achieves globally aligned, physically plausible 4D reconstructions and consistently outperforms existing paradigms in both global fidelity and human-scene consistency.

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Jinpeng Liu, Yukang Xu, Yutong Li, Xingyu Liu. 2026-06-01. TROPHIES: Temporal Reconstruction of Places, Humans, and Cameras from Multi-view Videos. https://arxiv.org/abs/2606.02350

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