By harnessing the potent generative capabilities of pre-trained large video diffusion models, we propose NVS-Solver, a new novel view synthesis (NVS) paradigm that operates \textit{without} the need for training. NVS-Solver adaptively modulates the diffusion sampling process with the given views to enable the creation of remarkable visual experiences from single or multiple views of static scenes or monocular videos of dynamic scenes. Specifically, built upon our theoretical modeling, we iteratively modulate the score function with the given scene priors represented with warped input views to control the video diffusion process. Moreover, by theoretically exploring the boundary of the estimation error, we achieve the modulation in an adaptive fashion according to the view pose and the number of diffusion steps. Extensive evaluations on both static and dynamic scenes substantiate the significant superiority of our NVS-Solver over state-of-the-art methods both quantitatively and qualitatively. \textit{ Source code in } \href{https://github.com/ZHU-Zhiyu/NVS_Solver}{https://github.com/ZHU-Zhiyu/NVS$\_$Solver}.

通过利用预训练的大规模视频扩散模型的强大生成能力，我们提出了NVS-Solver，一种新的无需训练的视图合成（NVS）范例，它能够通过单个或多个静态场景视图或动态场景单目视频实现令人惊叹的视觉体验。在我们的理论模型基础上，我们通过迭代地调制与给定场景先验相对应的得分函数来控制视频扩散过程，并根据视图姿势和扩散步数在自适应方式下实现调制。广泛的评估量化和质量化地证明了我们的NVS-Solver相对于现有方法在静态和动态场景下的显著优势。

NVS-Solver: 视频扩散模型作为零样本新视角合成器