MirrorGaussian: Reflecting 3D Gaussians for Reconstructing Mirror Reflections

TL;DR

MirrorGaussian introduces a novel method for real-time 3D scene reconstruction with mirror reflections by leveraging mirror symmetry and dual-rendering of 3D Gaussians, enabling high-quality rendering and scene editing.

Contribution

It is the first approach to reconstruct mirror scenes with real-time rendering using 3D Gaussian Splatting and a dual-rendering strategy based on mirror symmetry.

Findings

Outperforms existing methods with state-of-the-art results.

Enables high-quality, real-time rendering of scenes with mirrors.

Supports scene editing like adding mirrors and objects.

Abstract

3D Gaussian Splatting showcases notable advancements in photo-realistic and real-time novel view synthesis. However, it faces challenges in modeling mirror reflections, which exhibit substantial appearance variations from different viewpoints. To tackle this problem, we present MirrorGaussian, the first method for mirror scene reconstruction with real-time rendering based on 3D Gaussian Splatting. The key insight is grounded on the mirror symmetry between the real-world space and the virtual mirror space. We introduce an intuitive dual-rendering strategy that enables differentiable rasterization of both the real-world 3D Gaussians and the mirrored counterpart obtained by reflecting the former about the mirror plane. All 3D Gaussians are jointly optimized with the mirror plane in an end-to-end framework. MirrorGaussian achieves high-quality and real-time rendering in scenes with mirrors, empowering scene editing like adding new mirrors and objects. Comprehensive experiments on multiple datasets demonstrate that our approach significantly outperforms existing methods, achieving state-of-the-art results. Project page: https://mirror-gaussian.github.io/.