WorldStereo bridges video generation and 3D reconstruction via geometry-aware memory mechanisms for consistent multi-view synthesis.
Recent advances in foundational Video Diffusion Models (VDMs) have yielded significant progress. Yet, despite the remarkable visual quality of generated videos, reconstructing consistent 3D scenes from these outputs remains challenging, due to limited camera controllability and inconsistent generated content when viewed from distinct camera trajectories. In this paper, we propose WorldStereo, a novel framework that bridges camera-guided video generation and 3D reconstruction via two dedicated geometric memory modules. Formally, the global-geometric memory enables precise camera control while injecting coarse structural priors through incrementally updated point clouds. Moreover, the spatial-stereo memory constrains the model's attention receptive fields with 3D correspondence to focus on fine-grained details from the memory bank. These components enable WorldStereo to generate multi-view-consistent videos under precise camera control, facilitating high-quality 3D reconstruction. Furthermore, the flexible control branch-based WorldStereo shows impressive efficiency, benefiting from the distribution matching distilled VDM backbone without joint training. Extensive experiments across both camera-guided video generation and 3D reconstruction benchmarks demonstrate the effectiveness of our approach. Notably, we show that WorldStereo acts as a powerful world model, tackling diverse scene generation tasks (whether starting from perspective or panoramic images) with high-fidelity 3D results. Models will be released.
WorldStereo generates geometrically consistent multi-view videos using Global-Geometric and Spatial-Stereo memory mechanisms for 3D reconstruction.
The framework maintains precise camera control while preserving both coarse structure and fine-grained details across different camera trajectories.
WorldStereo avoids expensive long-sequence generation by generating multiple medium-length videos that are consistent with each other.
Point clouds alone provide coarse structural guidance without capturing fine-grained details like textures and small features.
Existing video generation models struggle to maintain consistency across varied camera trajectories, leading to ambiguous and blurry reconstructions.
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