LA-GCN

Code for LAGCN

Language Knowledge-Assisted Representation Learning for Skeleton-Based Action Recognition

Haojun Xu, Yan Gao, Zheng Hui, Jie Li, Xinbo Gao

arXiv 2305.12398

TODO List

• Upload NW-UCLA configs
• Add ensemble code
• Upload pretrained weights
• Add code of generating CPR graph (loss relevant)
• Add code of generating GPR graph (input data relevant)

Data Preparation

Download datasets.

There are 3 datasets to download:

• NTU RGB+D 60 Skeleton
• NTU RGB+D 120 Skeleton
• NW-UCLA

NTU RGB+D 60 and 120

1. Request dataset here: https://rose1.ntu.edu.sg/dataset/actionRecognition
2. Download the skeleton-only datasets:
   1. nturgbd_skeletons_s001_to_s017.zip (NTU RGB+D 60)
   2. nturgbd_skeletons_s018_to_s032.zip (NTU RGB+D 120)
   3. Extract above files to ./data/nturgbd_raw

NW-UCLA

1. Download dataset from here
2. Move all_sqe to ./data/NW-UCLA

Data Processing

Directory Structure

Put downloaded data into the following directory structure:

- data/
  - NW-UCLA/
    - all_sqe
      ... # raw data of NW-UCLA
  - ntu/
  - ntu120/
  - nturgbd_raw/
    - nturgb+d_skeletons/     # from `nturgbd_skeletons_s001_to_s017.zip`
      ...
    - nturgb+d_skeletons120/  # from `nturgbd_skeletons_s018_to_s032.zip`
      ...

Generating Data

• Generate NTU RGB+D 60 or NTU RGB+D 120 dataset:

 cd ./data/ntu # or cd ./data/ntu120
 # Get skeleton of each performer
 python get_raw_skes_data.py
 # Remove the bad skeleton 
 python get_raw_denoised_data.py
 # Transform the skeleton to the center of the first frame
 python seq_transformation.py

Training & Testing

Training

• Change the config file depending on what you want.

# Example: training LAGCN on NTU RGB+D 120 cross subject with GPU 0
python main.py --config configs/ntu120-xsub/joint.yaml --work-dir work_dir/ntu120/csub/lagcn_joint --device 0

• To train your own model, put model file your_model.py under ./model and run:

# Example: training your own model on NTU RGB+D 120 cross subject
python main.py --config config/ntu120-xsub/joint.yaml --model model.your_model.Model --work-dir work_dir/ntu120/xsub/your_model --device 0

Testing

• To test the trained models saved in <work_dir>, run the following command:

python main.py --config <work_dir>/config.yaml --work-dir <work_dir> --phase test --save-score True --weights <work_dir>/xxx.pt --device 0

• To ensemble the results of different modalities, run

# Example: ensemble four modalities of LAGCN on NTU RGB+D 120 cross subject
python ensemble.py --datasets ntu120/xsub --joint work_dir/ntu120/xsub/j.pkl --bone work_dir/ntu120/xsub/b.pkl --joint-motion work_dir/ntu120/xsub/jm.pkl --bone-motion work_dir/ntu120/xsub/bm.pkl
# Ensemble six modalities of LAGCN on NTU RGB+D 120 cross subject
python ensemble_6s.py --datasets ntu120/xsub --joint work_dir/ntu120/xsub/j.pkl --bone work_dir/ntu120/xsub/b.pkl --joint-motion work_dir/ntu120/xsub/jm.pkl --bone-motion work_dir/ntu120/xsub/bm.pkl --prompt work_dir/ntu120/xsub/p2.pkl --prompt2 work_dir/ntu120/xsub/p5.pkl

Pretrained Models

Pretrained weights and validation set inference results are provided in the link and link respectively.

The performance of NW-UCLA dataset is slightly different from the article table. The reason is that the MHA-GC used in NW-UCLA experiment is the numerical approximation version (Fig. 7b right). We will modify the relevant table of the article in the next version.

Acknowledgements

This repo is based on 2s-AGCN. The data processing is borrowed from SGN and HCN.

Thanks to the original authors for their work!

Citation

Please cite this work if you find it useful:

@article{xu2023language,
      title={Language Knowledge-Assisted Representation Learning for Skeleton-Based Action Recognition}, 
      author={Haojun Xu and Yan Gao and Zheng Hui and Jie Li and Xinbo Gao},
      year={2023},
      primaryClass={cs.CV},
      journal={CoRR},
      volume={abs/2305.12398},
      url={https://arxiv.org/abs/2305.12398}
}

Contact

For any questions, feel free to contact: damnull@outlook.com