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arXiv 2501.05484cs.CV
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通过全局-局部协作扩散实现免调优长视频生成

Tuning-Free Long Video Generation via Global-Local Collaborative Diffusion

Space AI, Li Auto(理想汽车太空智能部门);Zhejiang University(浙江大学);University of Science and Technology of China(中国科学技术大学);University of New South Wales(新南威尔士大学);Singapore University of Technology and Design(新加坡科技设计大学)

Yongjia Ma, Junlin Chen, Donglin Di, Qi Xie, Lei Fan, Wei Chen, Xiaofei Gou, Na Zhao, Xun Yang

AI总结:

针对长视频生成中的时空不一致与高计算成本问题,提出免调优的 GLC-Diffusion,通过全局-局部协作去噪、噪声重新初始化及 VMCR 模块提升长视频的连贯性与保真度。

摘要:

创建高保真、连贯的长视频是一个备受追求的目标。尽管近期的视频扩散模型已展现出良好潜力,但它们仍需应对时空不一致性以及高昂计算资源需求的问题。我们提出 GLC-Diffusion,这是一种用于长视频生成的免调优方法。该方法通过建立去噪轨迹,以全局-局部协作去噪对长视频去噪过程进行建模,从而确保整体内容一致性以及帧间的时间连贯性。此外,我们引入噪声重新初始化策略,该策略结合局部噪声混洗与频率融合,以改善全局内容一致性和视觉多样性。进一步地,我们提出视频运动一致性细化(Video Motion Consistency Refinement,VMCR)模块,通过计算逐像素损失和频率域损失的梯度来增强视觉一致性与时间平滑性。大量实验(包括对不同长度视频的定量和定性评估,例如长度为 3 倍和 6 倍的视频)表明,我们的方法能够有效融入现有视频扩散模型,生成连贯且高保真的长视频,效果优于以往方法。

英文摘要:

Creating high-fidelity, coherent long videos is a sought-after aspiration. While recent video diffusion models have shown promising potential, they still grapple with spatiotemporal inconsistencies and high computational resource demands. We propose GLC-Diffusion, a tuning-free method for long video generation. It models the long video denoising process by establishing denoising trajectories through Global-Local Collaborative Denoising to ensure overall content consistency and temporal coherence between frames. Additionally, we introduce a Noise Reinitialization strategy which combines local noise shuffling with frequency fusion to improve global content consistency and visual diversity. Further, we propose a Video Motion Consistency Refinement (VMCR) module that computes the gradient of pixel-wise and frequency-wise losses to enhance visual consistency and temporal smoothness. Extensive experiments, including quantitative and qualitative evaluations on videos of varying lengths (\textit{e.g.}, 3\times and 6\times longer), demonstrate that our method effectively integrates with existing video diffusion models, producing coherent, high-fidelity long videos superior to previous approaches.

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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