EvenSplat: Coupled 2D-3D Decomposition for Gaussian Splatting under Exposure and Illumination Variation

Wu, Tongyu, Edwards, Jacob, Cui, Ziteng, Jiang, Caigui and Wang, Cheng ORCID: https://orcid.org/0000-0003-4711-4534 (2026) EvenSplat: Coupled 2D-3D Decomposition for Gaussian Splatting under Exposure and Illumination Variation.

Preview

PDF (2610.01876v1) - Draft Version Available under License Creative Commons Attribution. Download (35MB) | Preview

Abstract

A surface photographed under even light presents nearly the same appearance from every angle; the same surface under uneven light does not. Exposure changes between views, illumination varies within a single image, and locally strong light sources leave one region bright and its neighbor in shadow. Multi-view reconstruction methods such as 3D Gaussian Splatting treat these lighting artifacts as if they were properties of the scene, entangling capture-specific illumination with the geometry and color they recover. We present EvenSplat, a framework that separates the two. EvenSplat couples an image-space illumination decomposition with an illumination field carried by the Gaussians, so that the same explanation of the lighting is shared between the two-dimensional and three-dimensional views of the scene; a camera-response network and a local exposure-compensation module absorb the global and residual differences that remain across training images. Through extensive experiments across multiple datasets and diverse forms of uneven illumination (cross-view exposure, spatial illumination variation, and high-contrast lighting) on both real-world captured and simulated benchmarks, EvenSplat generally outperforms state-of-the-art methods, particularly under high-contrast illumination.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Computing Sciences
UEA Research Groups:	Faculty of Science > Research Groups > Colour and Imaging Lab Faculty of Science > Research Groups > Data Science and AI
Related URLs:	https://arxiv.org/abs/2610.01876
Depositing User:	LivePure Connector
Date Deposited:	05 Oct 2026 15:12
Last Modified:	05 Oct 2026 15:12
URI:	https://ueaeprints.uea.ac.uk/id/eprint/104727
DOI:

Downloads

Actions (login required)

View Item