If you find this project useful for your work, please consider citing:

@misc{liu2024point,
     title={Point Mamba: A Novel Point Cloud Backbone Based on State Space Model with Octree-Based Ordering Strategy}, 
     author={Jiuming Liu and Ruiji Yu and Yian Wang and Yu Zheng and Tianchen Deng and Weicai Ye and Hesheng Wang},
     year={2024},
     eprint={2403.06467},
     archivePrefix={arXiv},
     primaryClass={cs.CV}
}

• 2024/3/11 Release our code and checkpoint for semantic segmentation on Scannet!

The code has been tested on Ubuntu 20.04 with 3 Nvidia 4090 GPUs (24GB memory).

1. Python 3.10.13

   conda create -n your_env_name python=3.10.13

2. Install torch 2.1.1 + cu118

   pip install torch==2.1.1 torchvision==0.16.1 torchaudio==2.1.1 --index-url https://download.pytorch.org/whl/cu118

3. Clone this repository and install the requirements.

   pip install -r requirements.txt

4. Install the library for octree-based depthwise convolution.

   git clone https://github.com/octree-nn/dwconv.git
   pip install ./dwconv

5. Install causal-conv1d and mamba, which you can download in this link.

   pip install -e causal-conv1d
   pip install -e mamba

1. Data: Download the data from the ScanNet benchmark. Unzip the data and place it to the folder <scannet_folder>. Run the following command to prepare the dataset.

   python tools/seg_scannet.py --run process_scannet --path_in scannet

   The filelist should be like this:

   ├── scannet
   │ ├── scans
   │ │ ├── [scene_id]
   │ │ │ ├── [scene_id].aggregation.json
   │ │ │ ├── [scene_id].txt
   │ │ │ ├── [scene_id]_vh_clean.aggregation.json
   │ │ │ ├── [scene_id]_vh_clean.segs.json
   │ │ │ ├── [scene_id]_vh_clean_2.0.010000.segs.json
   │ │ │ ├── [scene_id]_vh_clean_2.labels.ply
   │ │ │ ├── [scene_id]_vh_clean_2.ply
   │ ├── scans_test
   │ │ ├── [scene_id]
   │ │ │ ├── [scene_id].aggregation.json
   │ │ │ ├── [scene_id].txt
   │ │ │ ├── [scene_id]_vh_clean.aggregation.json
   │ │ │ ├── [scene_id]_vh_clean.segs.json
   │ │ │ ├── [scene_id]_vh_clean_2.0.010000.segs.json
   │ │ │ ├── [scene_id]_vh_clean_2.ply
   │ ├── scannetv2-labels.combined.tsv

2. Train: Run the following command to train the network with 3 GPUs and port 10001. The mIoU on the validation set without voting is 75.0. And the training log and weights can be download in link

   python scripts/run_seg_scannet.py --gpu 0,1,2 --alias scannet --port 10001

3. Evaluate: Run the following command to get the per-point predictions for the validation dataset with a voting strategy. And after voting, the mIoU is 75.7 on the validation dataset.

   python scripts/run_seg_scannet.py --gpu 0 --alias scannet --run validate

1. Data: Run the following command to prepare the dataset.

   python tools/cls_modelnet.py

2. Train: Run the following command to train the network with 1 GPU. The classification accuracy on the testing set without voting is 92.7%. The code for Point Mamba(C) will be released in another branch later. Checkpoints will be released later.

   python classification.py --config configs/cls_m40.yaml SOLVER.gpu 0,

Our project is based on

• Mamba (paper, code)
• Octformer(paper, code)
• Vision Mamba(paper,code)
• Point Cloud Transformer(paper, code)

Thanks for their wonderful works!