NeuralField-LDM: Scene Generation with Hierarchical Latent Diffusion Models

Seung Wook Kim; Bradley Brown; Kangxue Yin; Karsten Kreis; Katja Schwarz; Daiqing Li; Robin Rombach; Antonio Torralba; Sanja Fidler

arXiv · 2304.09787

NeuralField-LDM: Scene Generation with Hierarchical Latent Diffusion Models

Seung Wook Kim·Bradley Brown·Kangxue Yin·Karsten Kreis·Katja Schwarz·Daiqing Li·Robin Rombach·Antonio Torralba·Sanja Fidler

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Abstract

Automatically generating high-quality real world 3D scenes is of enormous interest for applications such as virtual reality and robotics simulation. Towards this goal, we introduce NeuralField-LDM, a generative model capable of synthesizing complex 3D environments. We leverage Latent Diffusion Models that have been successfully utilized for efficient high-quality 2D content creation. We first train a scene auto-encoder to express a set of image and pose pairs as a neural field, represented as density and feature voxel grids that can be projected to produce novel views of the scene. To further compress this representation, we train a latent-autoencoder that maps the voxel grids to a set of latent representations. A hierarchical diffusion model is then fit to the latents to complete the scene generation pipeline. We achieve a substantial improvement over existing state-of-the-art scene generation models. Additionally, we show how NeuralField-LDM can be used for a variety of 3D content creation applications, including conditional scene generation, scene inpainting and scene style manipulation.

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Seung Wook Kim, Bradley Brown, Kangxue Yin, Karsten Kreis, Katja Schwarz, Daiqing Li, Robin Rombach, Antonio Torralba, Sanja Fidler. 2023-04-19. NeuralField-LDM: Scene Generation with Hierarchical Latent Diffusion Models. https://arxiv.org/abs/2304.09787

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