A Diffusion Approach to Radiance Field Relighting using Multi-Illumination Synthesis - Inria - Institut national de recherche en sciences et technologies du numérique
Article Dans Une Revue Computer Graphics Forum Année : 2024

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

Résumé

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.
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Dates et versions

hal-04628346 , version 1 (28-06-2024)

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  • HAL Id : hal-04628346 , version 1

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Y Poirier-Ginter, A Gauthier, J Phillip, J.-F Lalonde, George Drettakis. A Diffusion Approach to Radiance Field Relighting using Multi-Illumination Synthesis. Computer Graphics Forum, 2024, 43 (4). ⟨hal-04628346⟩
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