DovSG

Dynamic Open-Vocabulary 3D Scene Graphs for Long-term Language-Guided Mobile Manipulation

1 Introduction

DovSG constructs a Dynamic 3D Scene Graph and leverages task decomposition with large language models, enabling localized updates of the 3D scene graphs during interactive exploration. This assists mobile robots in accurately executing long-term tasks, even in scenarios where human modifications to the environment are present.

Contributors: Zhijie Yan, Shufei Li, Zuoxu Wang, Lixiu Wu, Han Wang, Jun Zhu, Lijiang Chen, Jihong Liu

1.1 Our paper

Our paper is now available on arXiv: Dynamic Open-Vocabulary 3D Scene Graphs for Long-term Language-Guided Mobile Manipulation.

If our code is used in your project, please cite our paper following the bibtex below:

@ARTICLE{10909193,
  author={Yan, Zhijie and Li, Shufei and Wang, Zuoxu and Wu, Lixiu and Wang, Han and Zhu, Jun and Chen, Lijiang and Liu, Jihong},
  journal={IEEE Robotics and Automation Letters}, 
  title={Dynamic Open-Vocabulary 3D Scene Graphs for Long-Term Language-Guided Mobile Manipulation}, 
  year={2025},
  volume={10},
  number={5},
  pages={4252-4259},
  keywords={Three-dimensional displays;Robots;Planning;Semantics;Robot kinematics;Navigation;Containers;Visualization;Mobile robots;Manipulator dynamics;3D scene graph;long-term tasks;mobile manipulation;open vocabulary},
  doi={10.1109/LRA.2025.3547643}}

1.2 Our demo

Our accompanying demo are now available on YouTube and Project Page.

2 Prerequisited

• We have set up all the necessary environments on a Lenovo Y9000K laptop running Ubuntu 20.04, equipped with an NVIDIA RTX 4090 GPU with 16GB of VRAM.

• We used a real-world setup with a UFACTORY xARM6 robotic arm on an Agilex Ranger Mini 3 mobile base, equipped with a RealSense D455 camera for perception and a basket for item transport.

2.1 Ubuntu and ROS

Ubuntu 20.04. ROS Installation.

2.2 Environment Setup

conda create -n dovsg python=3.9 -y
conda activate dovsg

• Install DovSG environment for running the DovSG: install_dovsg.md.

• Install DROID-SLAM environment for scan the room: install_droidslam.md.

• Download checkpoints: down_checkpoints.md

3 Run DovSG

3.1 Testing and Visualization

You can directly download the pre-recorded scenes we provided from Google Cloud. Please place them in the project's root directory, specifically in DovSG/data_example, and set the tags to your_name_of_scene, such as room1.

Test DROID-SLAM Environment

• Activate Conda Environment

conda deactivate 
conda activate droidenv

• Running Pose Estimation Scripts

# cd /path/to/DovSG/
python dovsg/scripts/pose_estimation.py \
    --datadir "data_example/room1" \
    --calib "data_example/room1/calib.txt" \
    --t0 0 \
    --stride 1 \
    --weights "checkpoints/droid-slam/droid.pth" \
    --buffer 2048

After the program finishes, you will see a new folder named poses_droidslam under data_example/room1, which contains the poses from all viewpoints.

Next, run the following command to visualize the reconstructed scene based on the poses estimated by DROID-SLAM.

• Activate Conda Environment

conda deactivate 
conda activate dovsg

• Running Show PointCloud Scripts

python dovsg/scripts/show_pointcloud.py \
    --tags "room1" \
    --pose_tags "poses_droidslam"

If everything above runs without issues, you should be able to run the following command successfully.

3.2 Run our demo

Running Our Demo: The Workflow is as Follows:

1. Scan the room using a camera to collect RGB-Ds data.
2. Estimate camera poses based on the collected RGB-Ds.
3. Transform the coordinate system based on the detected floor.
4. Train a relocalization model (ACE) for later use.
5. Generate the View Dataset.
6. Use VLMs to represent real-world objects as nodes in a 3D Scene Graph, and extract relationships using a rule-based method.
7. Extract LightGlue features to assist with future relocalization.
8. Use LLM for task planning.
9. Execute subtasks while continuously updating the 3D Scene Graph using relocalization.

python demo.py \
    --tags "room1" \
    --preprocess \
    --debug \
    --task_scene_change_level "Minor Adjustment" \
    --task_description "Please move the red pepper to the plate, then move the green pepper to plate."

3.3 Run on real world workstation

You need to refer to here to configure the aglix ranger mini.

3.3.1 You should Scanning the room for memory

python demo.py \
    --tags `your_name_of_scene` \
    --scanning_room \
    --preprocess \
    --task_scene_change_level `your_task_scene_change_level` \
     --task_description `your_task_description`

3.3.2 In one terminal run the hardcode.

cd hardcode
source ~/agilex_ws/devel/setup.bash
rosrun ranger_bringup bringup_can2usb.bash
roslaunch ranger_bringup ranger_mini_v2.launch

# You need to replace the port with your own.
python server.py  

3.3.3 In another terminal run the Navigation and Manipulation Module.

python demo.py \
    --tags `your_name_of_scene` \
    --preprocess \
    --task_scene_change_level `your_task_scene_change_level` \
     --task_description `your_task_description`

Reference

• Ok-Robot: https://ok-robot.github.io/
• RoboEXP: https://github.com/Jianghanxiao/RoboEXP
• ConceptGraphs: https://github.com/concept-graphs/concept-graphs