A Diffusion Approach to Radiance Field Relighting using Multi-Illumination Synthesis

• URL: http://arxiv.org/abs/2409.08947v2
• Date: Tue, 17 Sep 2024 12:16:31 GMT
• Title: A Diffusion Approach to Radiance Field Relighting using Multi-Illumination Synthesis
• Authors: Yohan Poirier-Ginter, Alban Gauthier, Julien Philip, Jean-Francois Lalonde, George Drettakis,
• Abstract summary: We introduce a method to create relightable radiance fields using single-illumination data. We first fine-tune a 2D diffusion model on a multi-illumination dataset conditioned by light direction. We show results on synthetic and real multi-view data under single illumination.
• Score: 6.883971329818549
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Relighting radiance fields is severely underconstrained for multi-view data, which is most often captured under a single illumination condition; It is especially hard for full scenes containing multiple objects. We introduce a method to create relightable radiance fields using such single-illumination data by exploiting priors extracted from 2D image diffusion models. We first fine-tune a 2D diffusion model on a multi-illumination dataset conditioned by light direction, allowing us to augment a single-illumination capture into a realistic -- but possibly inconsistent -- multi-illumination dataset from directly defined light directions. We use this augmented data to create a relightable radiance field represented by 3D Gaussian splats. To allow direct control of light direction for low-frequency lighting, we represent appearance with a multi-layer perceptron parameterized on light direction. To enforce multi-view consistency and overcome inaccuracies we optimize a per-image auxiliary feature vector. We show results on synthetic and real multi-view data under single illumination, demonstrating that our method successfully exploits 2D diffusion model priors to allow realistic 3D relighting for complete scenes. Project site https://repo-sam.inria.fr/fungraph/generative-radiance-field-relighting/

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