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arXiv 2102.08860cs.CVcs.GR
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ShaRF:单个视图的形状调节辐射场

ShaRF: Shape-conditioned Radiance Fields from a Single View

Google Research(谷歌研究院)

Konstantinos Rematas, Ricardo Martin-Brualla, Vittorio Ferrari

摘要:

我们提出了一种方法,用于估计神经场景表示的对象,只有一个单一的图像。我们的方法的核心是估计的几何支架的对象和它的使用作为指导的基础辐射场的重建。我们的配方是基于一个生成过程,首先映射一个潜在的代码体素化的形状,然后将其呈现给图像,与对象的外观由第二个潜在的代码控制。在推理过程中,我们优化了潜在代码和网络,以适应新对象的测试图像。形状和外观的明确解纠缠允许我们的模型在给定单个图像的情况下进行微调。然后,我们可以以几何一致的方式渲染新视图,它们忠实地表示输入对象。此外,我们的方法能够推广到训练域之外的图像(更逼真的渲染,甚至是真实的照片)。最后,推断出的几何支架本身是对对象的3D形状的准确估计。我们在几个实验中证明了我们的方法在合成和真实图像的有效性。

英文摘要:

We present a method for estimating neural scenes representations of objects given only a single image. The core of our method is the estimation of a geometric scaffold for the object and its use as a guide for the reconstruction of the underlying radiance field. Our formulation is based on a generative process that first maps a latent code to a voxelized shape, and then renders it to an image, with the object appearance being controlled by a second latent code. During inference, we optimize both the latent codes and the networks to fit a test image of a new object. The explicit disentanglement of shape and appearance allows our model to be fine-tuned given a single image. We can then render new views in a geometrically consistent manner and they represent faithfully the input object. Additionally, our method is able to generalize to images outside of the training domain (more realistic renderings and even real photographs). Finally, the inferred geometric scaffold is itself an accurate estimate of the object's 3D shape. We demonstrate in several experiments the effectiveness of our approach in both synthetic and real images.

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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