Unsupervised Discovery of Object Radiance Fields

Hong-Xing Yu, Leonidas Guibas, Jiajun Wu

Keywords: object discovery, scene decomposition, 3D scene representations, object-centric learning

Abstract: We study the problem of inferring an object-centric scene representation from a single image, aiming to derive a representation that explains the image formation process, captures the scene's 3D nature, and is learned without supervision. Most existing methods on scene decomposition lack one or more of these characteristics, due to the fundamental challenge in integrating the complex 3D-to-2D image formation process into powerful inference schemes like deep networks. In this paper, we propose unsupervised discovery of Object Radiance Fields (uORF), integrating recent progresses in neural 3D scene representations and rendering with deep inference networks for unsupervised 3D scene decomposition. Trained on multi-view RGB images without annotations, uORF learns to decompose complex scenes with diverse, textured background from a single image. We show that uORF enables novel tasks, such as scene segmentation and editing in 3D, and it performs well on these tasks and on novel view synthesis on three datasets.

One-sentence Summary: Inferring object-centric factorized 3D scene representations from a single image, learned without 3D geometry or segmentation supervision.

Community Implementations: [ 2 code implementations](https://www.catalyzex.com/paper/arxiv:2107.07905/code)