Recent work on single-view 3D reconstruction shows impressive results, but has been restricted to a few fixed categories where extensive training data is available. The problem of generalizing these models to new classes with limited training data is largely open. To address this problem, we present a new model architecture that reframes single-view 3D reconstruction as learnt, category agnostic refinement of a provided, category-specific prior. The provided prior shape for a novel class can be obtained from as few as one 3D shape from this class. Our model can start reconstructing objects from the novel class using this prior without seeing any training image for this class and without any retraining. Our model outperforms category-agnostic baselines and remains competitive with more sophisticated baselines that finetune on the novel categories. Additionally, our network is capable of improving the reconstruction given multiple views despite not being trained on task of multi-view reconstruction.

本文提出一种新的模型架构，将单视角三维重建重新定义为分类无关的先验纠正学习，初步结果表明该模型可以从提供的少至一组三维形状开始对目标物品进行分类再建，无需重新训练，且对于多视角的立体成像也有较好表现。

基于先验知识的单幅图像 3D 重建的少样本泛化