VEnhancer: Generative Space-Time Enhancement for Video Generation

jwhe, Tianfan Xue, Dongyang Liu (Chris Liu), qilin, Peng Gao, Dahua Lin, Yu Qiao, Wanli Ouyang, Ziwei Liu

VEnhancer: Generative Space-Time Enhancement for Video Generation: 16 upvotes on Hugging Face Daily Papers, #7 of 14 papers on 2024-07-11. Day-by-day upvote history.

We present VEnhancer, a generative space-time enhancement framework that improves the existing text-to-video results by adding more details in spatial domain and synthetic detailed motion in temporal domain. Given a generated low-quality video, our approach can increase its spatial and temporal resolution simultaneously with arbitrary up-sampling space and time scales through a unified video diffusion model. Furthermore, VEnhancer effectively removes generated spatial artifacts and temporal flickering of generated videos. To achieve this, basing on a pretrained video diffusion model, we train a video ControlNet and inject it to the diffusion model as a condition on low frame-rate and low-resolution videos. To effectively train this video ControlNet, we design space-time data augmentation as well as video-aware conditioning. Benefiting from the above designs, VEnhancer yields to be stable during training and shares an elegant end-to-end training manner. Extensive experiments show that VEnhancer surpasses existing state-of-the-art video super-resolution and space-time super-resolution methods in enhancing AI-generated videos. Moreover, with VEnhancer, exisiting open-source state-of-the-art text-to-video method, VideoCrafter-2, reaches the top one in video generation benchmark -- VBench.

Paper page on Hugging Face · arXiv

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