ColorGradedGaussians: Palette-Based Color Grading for 3D Gaussian Splatting via View-Space Sparse Decomposition

TL;DR

This paper introduces a real-time, palette-based color editing framework for 3D Gaussian Splatting that improves editing precision and quality by using view-space decomposition and geometric constraints.

Contribution

It proposes a novel view-space palette decomposition method with geometric loss to enhance color editing accuracy in 3D Gaussian Splatting.

Findings

Achieves superior editing quality over primitive-space methods.

Enables professional color grading workflows in real-time.

Ensures consistent color decompositions using geometric constraints.

Abstract

Professional color editing requires precise control over both color (hue and saturation) and lightness, ideally through separate, independent controls. We present a real-time interactive color editing framework for 3D Gaussian Splatting (3DGS) that enables palette-based recoloring, per-palette tone curves for color-aware lightness adjustment, and accurate pixel-level constraints -- capabilities unavailable in prior palette-based 3DGS methods. Existing approaches decompose colors at the primitive level, optimizing per-Gaussian palette weights before splatting. However, sparse primitive-level weights do not guarantee sparse pixel-level decompositions after alpha-blending, causing palette edits to affect unintended regions and degrading editing quality. We address this through view-space palette decomposition, splatting weights instead of colors to optimize the observable appearance of the scene. We introduce a geometric loss using inverse barycentric coordinates to enforce consistent sparsity patterns, ensuring similar colors share similar decompositions. Our approach achieves superior editing quality compared to primitive-space methods, enabling professional color grading workflows for 3DGS scenes with real-time interaction.