A Diffusion Approach to Radiance Field Relighting using Multi-Illumination Synthesis
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Date
2024
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Publisher
The Eurographics Association and John Wiley & Sons Ltd.
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.
Description
@article{10.1111:cgf.15147,
journal = {Computer Graphics Forum},
title = {{A Diffusion Approach to Radiance Field Relighting using Multi-Illumination Synthesis}},
author = {Poirier-Ginter, Yohan and Gauthier, Alban and Philip, Julien and Lalonde, Jean-François and Drettakis, George},
year = {2024},
publisher = {The Eurographics Association and John Wiley & Sons Ltd.},
ISSN = {1467-8659},
DOI = {10.1111/cgf.15147}
}