Zero-shot novel view synthesis (NVS) from a single image is an essential problem in 3D object understanding. While recent approaches that leverage pre-trained generative models can synthesize high-quality novel views from in-the-wild inputs, they still struggle to maintain 3D consistency across different views. In this paper, we present Consistent-1-to-3, which is a generative framework that significantly mitigate this issue. Specifically, we decompose the NVS task into two stages: (i) transforming observed regions to a novel view, and (ii) hallucinating unseen regions. We design a scene representation transformer and view-conditioned diffusion model for performing these two stages respectively. Inside the models, to enforce 3D consistency, we propose to employ epipolor-guided attention to incorporate geometry constraints, and multi-view attention to better aggregate multi-view information. Finally, we design a hierarchy generation paradigm to generate long sequences of consistent views, allowing a full 360 observation of the provided object image. Qualitative and quantitative evaluation over multiple datasets demonstrate the effectiveness of the proposed mechanisms against state-of-the-art approaches. Our project page is at https://jianglongye.com/consistent123/

通过利用生成模型，将零样本新视点合成问题分为两个阶段，即将观察到的区域转化为新视图和对未见过的区域进行幻觉。为了解决3D一致性问题，本文提出了一种具有几何约束的极线引导注意力和多视图注意力的场景表示方法。通过多个数据集的定性和定量评估，证明了所提出机制在效果上优于现有方法。

Consistent-1-to-3: 基于几何感知扩散模型的一致的图像到3D视图合成