Fed3DGS: Scalable 3D Gaussian Splatting with Federated Learning

Core Concepts

Proposing Fed3DGS, a federated learning framework with 3D Gaussian splatting for scalable and accurate 3D reconstruction.

Abstract

Fed3DGS introduces a decentralized approach using federated learning to address scalability issues in large-scale 3D reconstruction. The method incorporates appearance modeling to handle non-IID data and demonstrates comparable image quality to centralized approaches. By leveraging distributed computational resources, Fed3DGS achieves efficient model updates and maintains global model scalability. The framework is validated on various benchmarks, showcasing superior performance in rendered image quality. Additionally, Fed3DGS reflects changes in scenes due to seasonal variations, highlighting its adaptability and effectiveness.

Stats

Block-NeRF trains 35 models with 2.8M images for an area of only 960 m × 570 m.
λ hyperparameter set to 0.2 following previous work.
Opacity threshold set to 0.05 for pruning redundant Gaussians.

Quotes

"Our method demonstrates rendered image quality comparable to centralized approaches."
"Our framework can reflect changes in the scene and effectively model appearance changes resulting from seasonal variations."

Key Insights Distilled From

Fed3DGS

by Teppei Suzuk... at arxiv.org 03-19-2024

https://arxiv.org/pdf/2403.11460.pdf

Deeper Inquiries

How does the use of distillation-based model updates impact the efficiency of the global model

The use of distillation-based model updates in the federated learning framework impacts the efficiency of the global model by allowing for a more streamlined and effective merging process. Unlike traditional methods like voxel grid filtering or simple replacement, which can lead to an increase in redundant Gaussians and compromise both geometry and appearance, distillation focuses on optimizing opacity logits while preserving image quality. By selectively updating Gaussians based on their contribution to the scene and pruning those with lower opacity, this approach ensures that only relevant information is retained in the global model. This targeted optimization helps prevent unnecessary growth in the number of Gaussians, leading to a more efficient representation of scenes without compromising rendering quality.

What are the potential challenges associated with clients having limited computational resources in this federated learning framework

In a federated learning framework where clients reconstruct scenes from scratch using distributed computational resources, challenges may arise when clients have limited computational resources. Clients with constrained capabilities may struggle to efficiently train local models or transmit data to the central server, potentially causing delays in model updates or affecting overall system performance. Limited computational resources could also impact the quality of local models generated by these clients, leading to inconsistencies across different parts of the scene reconstruction process. Additionally, if some clients are unable to keep up with training demands due to resource constraints, it could hinder progress for other clients relying on updated global models.

How might the incorporation of appearance modeling affect the overall computational costs of the system

The incorporation of appearance modeling into the federated learning framework can affect overall computational costs by introducing additional complexity and computation requirements. Appearance modeling involves adjusting camera exposure levels and color representations within 3D reconstructions based on seasonal changes or variations captured by different clients' data collections. This added layer of detail requires extra processing power and algorithmic sophistication during both training phases (for local models) and global model updates at the central server level.
Furthermore, handling appearance diversity effectively necessitates more intricate neural network architectures such as multi-layer perceptrons (MLPs) integrated into 3D Gaussian splatting techniques. These MLPs introduce additional parameters that need optimization during training processes.
While appearance modeling enhances realism and accuracy in rendered images reflecting changes due to seasons or varying capture conditions among client datasets; it does come at an increased cost in terms of computational resources required for training these sophisticated models effectively within a federated learning setup.