Quaternion Product Units for Deep Learning on 3D Rotation Groups

This is the code for the experiments of our CVPR 2020 paper. You can find the arXiv version of the paper here: https://arxiv.org/abs/1912.07791.

Citation

@inproceedings{zhang2020quaternion,
  title={Quaternion Product Units for Deep Learning on 3D Rotation Groups},
  author={Zhang, Xuan and Qin, Shaofei and Xu, Yi and Xu, Hongteng},
  booktitle={CVPR},
  year={2020}
}

Installation

We use python3 with PyTorch >= 1.0. We also tqdm, tensorboardX, pyyaml for logging. If you use Anaconda, you can setup with:

conda install pytorch torchvision
pip install tensorboardX pyyaml tqdm

We also use Jupyter Notebook and matplotlib for the synthetic data experiments.

The code for the point cloud experiments in pointcloud is modified based on Pointnet2_PyTorch. Please refer to the origin repository or pointcloud/README.rst for installation instructions.

Synthetic data experiments

Synthetic data experiments are in CubeEdge/experiments.ipynb.

Real-world data experiments

Data generation

We use the FPHA dataset and the NTU RGB+D dataset. Please refer to their respective project pages for permission and downloading. Data can also be visualized with scripts in data/scripts. Use the following commands to convert to our data formats.

Generate the NTU dataset:

python data/scripts/ntu_gendata.py <dir of raw data> --mode xyz --bench <xview or xsub>
python data/scripts/ntu_gendata.py <dir of raw data> --mode qrel --bench <xview or xsub>
python data/scripts/gen_edge.py <dir of qrel data> --dataset ntu

Generated data is in <dir of raw data>/../NTU-RGB-D/qrel.

Generate the FPHA dataset:

python data/scripts/fpha_gendata.py <dir of raw data> --mode xyz
python data/scripts/fpha_gendata.py <dir of raw data> --mode qrel
python data/scripts/gen_edge.py <dir of qrel data> --dataset fpha

Generated data is in <dir of raw data>/../fpha/qrel.

Training

python train.py configs/<config name>.yaml

You may specify the dataset or other parameters in the config file.

Testing

First enter the correct dataset path in config.test.yaml. Then use the following command to test the trained model with (<random rotate>=1) or without (<random rotate>=0) random rotations.

python test.py <dir of model folder> <random rotate the input data ? True:1, Flase:0>

Point cloud data experiments

Please refer to pointcloud/README.rst.

Credits

Our DGNN-based models are implemented based on Unofficial-DGNN-PyTorch.

The code for our point cloud experiments is modified based on Pointnet2_PyTorch.

We thank the respective authors for sharing their work.