arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2603.06408cs.CVcs.AIcs.GR
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物理模拟器闭环视频生成

Physical Simulator In-the-Loop Video Generation

Max Planck Institute for Informatics(马克斯·普朗克信息研究所);Singapore University of Technology and Design(新加坡科技设计大学);A*STAR(新加坡科技研究局);Google(谷歌);Saarbrücken Research Center for Visual Computing, Interaction and Artificial Intelligence(斯图加特视觉计算、交互与人工智能研究中心)

Lin Geng Foo, Mark He Huang, Alexandros Lattas, Stylianos Moschoglou, Thabo Beeler, Christian Theobalt

AI总结:

PSIVG通过整合物理模拟器与扩散模型,生成符合物理规律的视频,提升生成视频的真实性和一致性。

摘要:

近期基于扩散的视频生成技术在视觉真实感方面取得了显著进展,但仍然难以遵循基本的物理定律,如重力、惯性和碰撞。生成的对象往往在帧之间运动不一致,表现出不合理的动态或违反物理约束,限制了AI生成视频的真实性和可靠性。我们通过引入物理模拟器闭环视频生成(PSIVG)框架来解决这一差距,该框架将物理模拟器整合到视频扩散过程中。从由预训练扩散模型生成的模板视频开始,PSIVG重建4D场景和前景物体网格,并在物理模拟器中初始化它们,生成符合物理的轨迹。这些模拟轨迹随后用于引导视频生成器产生在空间和时间上一致的运动。为进一步提高物体运动期间的纹理一致性,我们提出了一种测试时间纹理一致性优化(TTCO)技术,该技术根据模拟器中的像素对应关系调整文本和特征嵌入。全面的实验表明,PSIVG生成的视频在更符合现实物理的同时,保持了视觉质量和多样性。项目页面:https://vcai.mpi-inf.mpg.de/projects/PSIVG/

英文摘要:

Recent advances in diffusion-based video generation have achieved remarkable visual realism but still struggle to obey basic physical laws such as gravity, inertia, and collision. Generated objects often move inconsistently across frames, exhibit implausible dynamics, or violate physical constraints, limiting the realism and reliability of AI-generated videos. We address this gap by introducing Physical Simulator In-the-loop Video Generation (PSIVG), a novel framework that integrates a physical simulator into the video diffusion process. Starting from a template video generated by a pre-trained diffusion model, PSIVG reconstructs the 4D scene and foreground object meshes, initializes them within a physical simulator, and generates physically consistent trajectories. These simulated trajectories are then used to guide the video generator toward spatio-temporally physically coherent motion. To further improve texture consistency during object movement, we propose a Test-Time Texture Consistency Optimization (TTCO) technique that adapts text and feature embeddings based on pixel correspondences from the simulator. Comprehensive experiments demonstrate that PSIVG produces videos that better adhere to real-world physics while preserving visual quality and diversity. Project Page: https://vcai.mpi-inf.mpg.de/projects/PSIVG/

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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