Reproduce “Rotated Lights for Consistent and Efficient 2D Gaussians Inverse Rendering” on OpenResearch
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About this paper
Geng Lin, Matthias Zwicker
A new inverse rendering pipeline, RotLight, addresses the albedo-lighting ambiguity in 2D Gaussian Splatting by employing a multi-rotation capture setup and an explicit proxy mesh for global illumination queries, achieving state-of-the-art albedo estimation with significantly fewer baked shadows in both synthetic and real-world scenarios, improving PSNR from 25.157 to 29.227 on the "Hotdog" scene compared to IRGS.
Key insights
- Observing an object under varied, correlated lighting angles (RotLight setup) is a highly effective and practical method to resolve the fundamental ambiguity between intrinsic albedo and scene illumination.
- An explicit proxy mesh significantly enhances the geometric consistency and accuracy of incident light integration for global illumination within a 2DGS inverse rendering framework.
- A residual constraint on a neural radiance cache ensures its accuracy and self-consistency, leading to improved albedo estimations, particularly in deeply shadowed areas reliant on indirect illumination.
Summary by alphaXiv.
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