Zheng Chen, Yulun Zhang, Jinjin Gu, Linghe Kong, Xiaokang Yang, and Fisher Yu, "Dual Aggregation Transformer for Image Super-Resolution", ICCV, 2023

[arXiv] [supplementary material] [visual results] [pretrained models]

Abstract: Transformer has recently gained considerable popularity in low-level vision tasks, including image super-resolution (SR). These networks utilize self-attention along different dimensions, spatial or channel, and achieve impressive performance. This inspires us to combine the two dimensions in Transformer for a more powerful representation capability. Based on the above idea, we propose a novel Transformer model, Dual Aggregation Transformer (DAT), for image SR. Our DAT aggregates features across spatial and channel dimensions, in the inter-block and intra-block dual manner. Specifically, we alternately apply spatial and channel self-attention in consecutive Transformer blocks. The alternate strategy enables DAT to capture the global context and realize inter-block feature aggregation. Furthermore, we propose the adaptive interaction module (AIM) and the spatial-gate feed-forward network (SGFN) to achieve intra-block feature aggregation. AIM complements two self-attention mechanisms from corresponding dimensions. Meanwhile, SGFN introduces additional non-linear spatial information in the feed-forward network. Extensive experiments show that our DAT surpasses current methods.

HR	LR	SwinIR	CAT	DAT (ours)

• Python 3.8
• PyTorch 1.8.0
• NVIDIA GPU + CUDA

# Clone the github repo and go to the default directory 'DAT'.
git clone https://github.com/zhengchen1999/DAT.git
conda create -n DAT python=3.8
conda activate DAT
pip install -r requirements.txt
python setup.py develop

1. Datasets
2. Models
3. Training
4. Testing
5. Results
6. Citation
7. Acknowledgements

Used training and testing sets can be downloaded as follows:

Download training and testing datasets and put them into the corresponding folders of datasets/. See datasets for the detail of the directory structure.

The performance is reported on Urban100 (x4). DAT-S, DAT, DAT-2: output size of FLOPs is 3×512×512. DAT-light: output size of FLOPs is 3×1280×720.

• Download training (DF2K, already processed) and testing (Set5, Set14, BSD100, Urban100, Manga109, already processed) datasets, place them in datasets/.

• Run the following scripts. The training configuration is in options/train/.

  # DAT-S, input=64x64, 4 GPUs
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_S_x2.yml --launcher pytorch
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_S_x3.yml --launcher pytorch
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_S_x4.yml --launcher pytorch
  
  # DAT, input=64x64, 4 GPUs
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_x2.yml --launcher pytorch
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_x3.yml --launcher pytorch
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_x4.yml --launcher pytorch
  
  # DAT-2, input=64x64, 4 GPUs
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_2_x2.yml --launcher pytorch
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_2_x3.yml --launcher pytorch
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_2_x4.yml --launcher pytorch
  
  # DAT-light, input=64x64, 4 GPUs
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_light_x2.yml --launcher pytorch
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_light_x3.yml --launcher pytorch
  python -m torch.distributed.launch --nproc_per_node=4 --master_port=4321 basicsr/train.py -opt options/Train/train_DAT_light_x4.yml --launcher pytorch

• The training experiment is in experiments/.

• Download the pre-trained models and place them in experiments/pretrained_models/.

  We provide pre-trained models for image SR: DAT-S, DAT, DAT-2, and DAT-light (x2, x3, x4).

• Download testing (Set5, Set14, BSD100, Urban100, Manga109) datasets, place them in datasets/.

• Run the following scripts. The testing configuration is in options/test/ (e.g., test_DAT_x2.yml).

  Note 1: You can set use_chop: True (default: False) in YML to chop the image for testing.

  # No self-ensemble
  # DAT-S, reproduces results in Table 2 of the main paper
  python basicsr/test.py -opt options/Test/test_DAT_S_x2.yml
  python basicsr/test.py -opt options/Test/test_DAT_S_x3.yml
  python basicsr/test.py -opt options/Test/test_DAT_S_x4.yml
  
  # DAT, reproduces results in Table 2 of the main paper
  python basicsr/test.py -opt options/Test/test_DAT_x2.yml
  python basicsr/test.py -opt options/Test/test_DAT_x3.yml
  python basicsr/test.py -opt options/Test/test_DAT_x4.yml
  
  # DAT-2, reproduces results in Table 1 of the supplementary material
  python basicsr/test.py -opt options/Test/test_DAT_2_x2.yml
  python basicsr/test.py -opt options/Test/test_DAT_2_x3.yml
  python basicsr/test.py -opt options/Test/test_DAT_2_x4.yml
  
  # DAT-light, reproduces results in Table 2 of the supplementary material
  python basicsr/test.py -opt options/Test/test_DAT_light_x2.yml
  python basicsr/test.py -opt options/Test/test_DAT_light_x3.yml
  python basicsr/test.py -opt options/Test/test_DAT_light_x4.yml

• The output is in results/.

• Download the pre-trained models and place them in experiments/pretrained_models/.

  We provide pre-trained models for image SR: DAT-S, DAT, and DAT-2 (x2, x3, x4).

• Put your dataset (single LR images) in datasets/single. Some test images are in this folder.

• Run the following scripts. The testing configuration is in options/test/ (e.g., test_single_x2.yml).

  Note 1: The default model is DAT. You can use other models like DAT-S by modifying the YML.

  Note 2: You can set use_chop: True (default: False) in YML to chop the image for testing.

  # Test on your dataset
  python basicsr/test.py -opt options/Test/test_single_x2.yml
  python basicsr/test.py -opt options/Test/test_single_x3.yml
  python basicsr/test.py -opt options/Test/test_single_x4.yml

• The output is in results/.

We achieved state-of-the-art performance. Detailed results can be found in the paper. All visual results of DAT can be downloaded here.

If you find the code helpful in your research or work, please cite the following paper(s).

@inproceedings{chen2023dual,
    title={Dual Aggregation Transformer for Image Super-Resolution},
    author={Chen, Zheng and Zhang, Yulun and Gu, Jinjin and Kong, Linghe and Yang, Xiaokang and Yu, Fisher},
    booktitle={ICCV},
    year={2023}
}

This code is built on BasicSR.