MASt3R-SLAM: Real-Time Dense SLAM with 3D Reconstruction Priors

Riku Murai* · Eric Dexheimer* · Andrew J. Davison

(* Equal Contribution)

Paper | Video | Project Page

Getting Started

Installation

conda create -n mast3r-slam python=3.11
conda activate mast3r-slam

Check the system's CUDA version with nvcc

nvcc --version

Install pytorch with matching CUDA version following:

# CUDA 11.8
conda install pytorch==2.5.1 torchvision==0.20.1 torchaudio==2.5.1  pytorch-cuda=11.8 -c pytorch -c nvidia
# CUDA 12.1
conda install pytorch==2.5.1 torchvision==0.20.1 torchaudio==2.5.1 pytorch-cuda=12.1 -c pytorch -c nvidia
# CUDA 12.4
conda install pytorch==2.5.1 torchvision==0.20.1 torchaudio==2.5.1 pytorch-cuda=12.4 -c pytorch -c nvidia

Clone the repo and install the dependencies.

git clone https://github.com/rmurai0610/MASt3R-SLAM.git --recursive
cd MASt3R-SLAM/

# if you've clone the repo without --recursive run
# git submodule update --init --recursive

pip install -e thirdparty/mast3r
pip install -e thirdparty/in3d
pip install --no-build-isolation -e .
 

# Optionally install torchcodec for faster mp4 loading
pip install torchcodec==0.1

Setup the checkpoints for MASt3R and retrieval. The license for the checkpoints and more information on the datasets used is written here.

mkdir -p checkpoints/
wget https://download.europe.naverlabs.com/ComputerVision/MASt3R/MASt3R_ViTLarge_BaseDecoder_512_catmlpdpt_metric.pth -P checkpoints/
wget https://download.europe.naverlabs.com/ComputerVision/MASt3R/MASt3R_ViTLarge_BaseDecoder_512_catmlpdpt_metric_retrieval_trainingfree.pth -P checkpoints/
wget https://download.europe.naverlabs.com/ComputerVision/MASt3R/MASt3R_ViTLarge_BaseDecoder_512_catmlpdpt_metric_retrieval_codebook.pkl -P checkpoints/

WSL Users

We have primarily tested on Ubuntu. If you are using WSL, please checkout to the windows branch and follow the above installation.

git checkout windows

This disables multiprocessing which causes an issue with shared memory as discussed here.

Examples

bash ./scripts/download_tum.sh
python main.py --dataset datasets/tum/rgbd_dataset_freiburg1_room/ --config config/calib.yaml

Live Demo

Connect a realsense camera to the PC and run

python main.py --dataset realsense --config config/base.yaml

Running on a video

Our system can process either MP4 videos or folders containing RGB images.

python main.py --dataset <path/to/video>.mp4 --config config/base.yaml
python main.py --dataset <path/to/folder> --config config/base.yaml

If the calibration parameters are known, you can specify them in intrinsics.yaml

python main.py --dataset <path/to/video>.mp4 --config config/base.yaml --calib config/intrinsics.yaml
python main.py --dataset <path/to/folder> --config config/base.yaml --calib config/intrinsics.yaml

Downloading Dataset

TUM-RGBD Dataset

bash ./scripts/download_tum.sh

7-Scenes Dataset

bash ./scripts/download_7_scenes.sh

EuRoC Dataset

bash ./scripts/download_euroc.sh

ETH3D SLAM Dataset

bash ./scripts/download_eth3d.sh

Running Evaluations

All evaluation script will run our system in a single-threaded, headless mode. We can run evaluations with/without calibration:

TUM-RGBD Dataset

bash ./scripts/eval_tum.sh 
bash ./scripts/eval_tum.sh --no-calib

7-Scenes Dataset

bash ./scripts/eval_7_scenes.sh 
bash ./scripts/eval_7_scenes.sh --no-calib

EuRoC Dataset

bash ./scripts/eval_euroc.sh 
bash ./scripts/eval_euroc.sh --no-calib

ETH3D SLAM Dataset

bash ./scripts/eval_eth3d.sh 

Reproducibility

There might be minor differences between the released version and the results in the paper after developing this multi-processing version. We run all our experiments on an RTX 4090, and the performance may differ when running with a different GPU.

Acknowledgement

We sincerely thank the developers and contributors of the many open-source projects that our code is built upon.

• MASt3R
• MASt3R-SfM
• DROID-SLAM
• ModernGL

Citation

If you found this code/work to be useful in your own research, please considering citing the following:

@inproceedings{murai2024_mast3rslam,
  title={{MASt3R-SLAM}: Real-Time Dense {SLAM} with {3D} Reconstruction Priors},
  author={Murai, Riku and Dexheimer, Eric and Davison, Andrew J.},
  booktitle={Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition},
  year={2025},
}