SLAG: Scalable Language-Augmented Gaussian Splatting

TL;DR

SLAG is a scalable multi-GPU framework that significantly accelerates language-augmented Gaussian splatting for large-scale scene representations, suitable for time-sensitive robotics applications.

Contribution

It introduces a novel parallelized scene encoding method that eliminates the need for per-Gaussian loss functions and incorporates a vector database for efficient embedding management.

Findings

Achieves 18x speedup in embedding computation on 16 GPUs

Maintains embedding quality on ScanNet and LERF datasets

Enables rapid scene encoding for large-scale robotics applications

Abstract

Language-augmented scene representations hold great promise for large-scale robotics applications such as search-and-rescue, smart cities, and mining. Many of these scenarios are time-sensitive, requiring rapid scene encoding while also being data-intensive, necessitating scalable solutions. Deploying these representations on robots with limited computational resources further adds to the challenge. To address this, we introduce SLAG, a multi-GPU framework for language-augmented Gaussian splatting that enhances the speed and scalability of embedding large scenes. Our method integrates 2D visual-language model features into 3D scenes using SAM and CLIP. Unlike prior approaches, SLAG eliminates the need for a loss function to compute per-Gaussian language embeddings. Instead, it derives embeddings from 3D Gaussian scene parameters via a normalized weighted average, enabling highly parallelized scene encoding. Additionally, we introduce a vector database for efficient embedding storage and retrieval. Our experiments show that SLAG achieves an 18 times speedup in embedding computation on a 16-GPU setup compared to OpenGaussian, while preserving embedding quality on the ScanNet and LERF datasets. For more details, visit our project website: https://slag-project.github.io/.