README.md

Cross-Domain Adaptive Teacher for Object Detection

This is the PyTorch implementation of our paper:
Cross-Domain Adaptive Teacher for Object Detection
Yu-Jhe Li, Xiaoliang Dai, Chih-Yao Ma, Yen-Cheng Liu, Kan Chen, Bichen Wu, Zijian He, Kris Kitani, Peter Vajda
IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2022

[Paper] [Project]

Installation

Prerequisites

• Python ≥ 3.6
• PyTorch ≥ 1.5 and torchvision that matches the PyTorch installation.
• Detectron2 == 0.3 (The version I used to run my code)

Our tested environment

• 8 V100 (16 batch size)
• 4 2080 Ti (4 batch size)

Install python env

To install required dependencies on the virtual environment of the python (e.g., virtualenv for python3), please run the following command at the root of this code:

$ python3 -m venv /path/to/new/virtual/environment/.
$ source /path/to/new/virtual/environment/bin/activate

For example:

$ mkdir python_env
$ python3 -m venv python_env/
$ source python_env/bin/activate

Build Detectron2 from Source

Follow the INSTALL.md to install Detectron2.

Dataset download

1. Download the datasets

2. Organize the dataset as the Cityscapes and PASCAL VOC format following:

adaptive_teacher/
└── datasets/
    └── cityscapes/
        ├── gtFine/
            ├── train/
            └── test/
            └── val/
        ├── leftImg8bit/
            ├── train/
            └── test/
            └── val/
   └── cityscapes_foggy/
        ├── gtFine/
            ├── train/
            └── test/
            └── val/
        ├── leftImg8bit/
            ├── train/
            └── test/
            └── val/
   └── VOC2012/
        ├── Annotations/
        ├── ImageSets/
        └── JPEGImages/
   └── clipark/
        ├── Annotations/
        ├── ImageSets/
        └── JPEGImages/
   └── watercolor/
        ├── Annotations/
        ├── ImageSets/
        └── JPEGImages/
    

Training

• Train the Adaptive Teacher under PASCAL VOC (source) and Clipart1k (target)

python train_net.py \
      --num-gpus 8 \
      --config configs/faster_rcnn_R101_cross_clipart.yaml\
      OUTPUT_DIR output/exp_clipart

• Train the Adaptive Teacher under cityscapes (source) and foggy cityscapes (target)

python train_net.py\
      --num-gpus 8\
      --config configs/faster_rcnn_VGG_cross_city.yaml\
      OUTPUT_DIR output/exp_city

Resume the training

python train_net.py \
      --resume \
      --num-gpus 8 \
      --config configs/faster_rcnn_R101_cross_clipart.yaml MODEL.WEIGHTS <your weight>.pth

Evaluation

python train_net.py \
      --eval-only \
      --num-gpus 8 \
      --config configs/faster_rcnn_R101_cross_clipart.yaml \
      MODEL.WEIGHTS <your weight>.pth

Results and Model Weights

If you are urgent with the pre-trained weights, please download our interal prod_weights here at the Link. Please note that the key name in the pre-trained model is slightly different and you will need to align manually. Otherwise, please wait and we will try to release the local weights in the future.

Real to Artistic Adaptation:

Backbone	Source set (labeled)	Target set (unlabeled)	Batch size	AP@.5	Model Weights	Comment
R101	VOC12	Clipark1k	16 labeled + 16 unlabeled	40.1	link	Ours w/o discriminator (dis=0)
R101	VOC12	Clipark1k	4 labeled + 4 unlabeled	47.2	link	lr=0.01, dis_w=0.1, default
R101	VOC12	Clipark1k	16 labeled + 16 unlabeled	49.6	link	Ours in the paper, unsup_w=0.5
R101+FPN	VOC12	Clipark1k	16 labeled + 16 unlabeled	51.2	link (coming soon)	For future work

Weather Adaptation:

Backbone	Source set (labeled)	Target set (unlabeled)	Batch size	AP@.5	Model Weights	Comment
VGG16	Cityscapes	Foggy Cityscapes (ALL)	16 labeled + 16 unlabeled	48.7	link (coming soon)	Ours w/o discriminator
VGG16	Cityscapes	Foggy Cityscapes (ALL)	16 labeled + 16 unlabeled	50.9	link (coming soon)	Ours in the paper
VGG16	Cityscapes	Foggy Cityscapes (0.02)	16 labeled + 16 unlabeled	in progress	link (coming soon)	Ours in the paper
VGG16+FPN	Cityscapes	Foggy Cityscapes (ALL)	16 labeled + 16 unlabeled	57.4	link (coming soon)	For future work

Citation

If you use Adaptive Teacher in your research or wish to refer to the results published in the paper, please use the following BibTeX entry.

@inproceedings{li2022cross,
    title={Cross-Domain Adaptive Teacher for Object Detection},
    author={Li, Yu-Jhe and Dai, Xiaoliang and Ma, Chih-Yao and Liu, Yen-Cheng and Chen, Kan and Wu, Bichen and He, Zijian and Kitani, Kris and Vajda, Peter},
    booktitle={IEEE Conference on Computer Vision and Pattern Recognition (CVPR)},
    year={2022}
} 

Also, if you use Detectron2 in your research, please use the following BibTeX entry.

@misc{wu2019detectron2,
  author =       {Yuxin Wu and Alexander Kirillov and Francisco Massa and
                  Wan-Yen Lo and Ross Girshick},
  title =        {Detectron2},
  howpublished = {\url{https://github.com/facebookresearch/detectron2}},
  year =         {2019}
}

License

This project is licensed under CC-BY-NC 4.0 License, as found in the LICENSE file.