Code for our CVPR 2020 paper "PPDM: Parallel Point Detection and Matching for Real-time Human-Object Interaction Detection".

Contributed by Yue Liao, Si Liu, Fei Wang, Yanjie Chen, Chen Qian, Jiashi Feng.


  • [x] Training code and test code on HICO-Det dataset. (2020-03-11)
  • [x] Training code and test code on HOI-A dataset. (2020-03-11)
  • [ ] HOI-A dataset.
  • [ ] Image demo.
  • [ ] Video demo.
  • [ ] PPDM for video HOI detection.
  • [ ] PPDM for human-centric relationship segmentation.

Getting Started


  1. Clone this repository.

    git clone https://github.com/YueLiao/PPDM.git $PPDM_ROOT
  2. Install pytorch0.4.1.

    conda install pytorch=0.4.1 torchvision -c pytorch
  3. Install the requirements.

    pip install -r requirements.txt
  4. Compile deformable convolutional (from DCNv2).

    cd $PPDM_ROOT/src/lib/models/networks/DCNv2


  1. Image Demo

  2. Video Demo

Training and Test

Dataset Preparation

  1. Download HICO-Det datasets. Organize them in Dataset folder as follows:

    |-- Dataset/
    |   |-- <dataset name>/
    |       |-- images
    |       |-- annotations
  2. Download the pre-processed annotations for HICO-Det from the [websit] and replace the original annotations in Dataset folder. The pre-processed annotations including

    |-- anotations/
    |   |-- trainval_hico.json
    |   |-- test_hico.json
    |   |-- corre_hico.npy

    The trainval_hico.json and test_hico.json are the "HOI-A format" annotations generated from iCAN annotation. corre_hico.npy is a binary mask, if the ith category of object and the jth category of verb can form an HOI label, the value at location (i, j) of corre_hico.npy is set to 1, else 0.


  1. Download the corresponding pre-trained models trained on COCO object detection dataset provided by CenterNet. (Res18, DLA34, Hourglass104). Put them into the models folder.

  2. The scripts for training in experiments folder. An example traning on HICO-DET dataset as follow:

    cd src
    python main.py  --batch_size 112 --master_batch 7 --lr 4.5e-4 --gpus 0,1,2,3,4,5,6,7  --num_workers 16  --load_model ../models/ctdet_coco_dla_2x.pth --image_dir images/train2015 --dataset hico --exp_id hoidet_hico_dla


  1. Evalution by our rewritten script and select the best checkpoint. The scripts for evalution are put into experiments folder. An example evalution on HICO-DET dataset as follow:

    cd src
    python test_hoi.py --exp_id hoidet_hico_dla --gpus 0 --dataset hico --image_dir images/test2015 --test_with_eval

    or directly generating the predictions and evalutating based on our provided checkpoint:

    cd src
    python test_hoi.py --exp_id hoidet_hico_dla --load_model ../exp/hoidet/hoidet_hico_dla/hoidet_hico_dla.pth --gpus 0 --dataset hico --image_dir images/test2015 --test_with_eval
  2. For HICO-DET official evalution.

  • Setup HICO-DET evaluation code:

    cd src/lib/eval
    sh set_hico_evalution.sh
  • Evaluate your prediction:

    cd src/lib/eval
    python trans_for_eval_hico.py best_predictions.json
    cd ho-rcnn
    matlab -r "Generate_detection.m; quite"

Results on HICO-DET and HOI-A

Our Results on HICO-DET dataset

Model Full (def) Rare (def) None-Rare (def) Full (ko) Rare (ko) None-Rare (ko) FPS Download
res18 14.94 8.83 16.76 16.98 10.42 18.94 89 model
dla34 19.34 12.21 21.47 21.53 14.14 23.73 38 model
dla34_3level 19.33 11.7 21.61 21.73 14.05 24.03 37 model
dla34_glob 19.42 13.12 21.3 21.76 15.13 23.74 38 model
dla34_glob_3level 19.75 12.38 21.95 22.13 14.72 24.35 37 model
hourglass104 21.92 15.13 23.95 24.25 17.21 26.35 14 model

Our Results on HOI-A dataset

Coming soon.


Please consider citing this project in your publications if it helps your research. The following is a BibTeX reference. The BibTeX entry requires the url LaTeX package.

  title={PPDM: Parallel Point Detection and Matching for Real-time Human-Object Interaction Detection},
  author={Liao, Yue and Liu, Si and Wang, Fei and Chen, Yanjie and Qian, Chen and Feng, Jiashi},
  journal={arXiv preprint arXiv:1912.12898},