BSRT: Improving Burst Super-Resolution with Swin Transformer and Flow-Guided Deformable Alignment (CVPRW 2022)

BSRT, the winner of the NTIRE 2022 Burst Super-Resolution Challenge Real-World Track.

You can also find our winner method in NTIRE 2021 Burst Super-Resolution Challenge here.

This work addresses the Burst Super-Resolution (BurstSR) task using a new architecture, which requires restoring a high-quality image from a sequence of noisy, misaligned, and low-resolution RAW bursts. To overcome the challenges in BurstSR, we propose a Burst Super-Resolution Transformer (BSRT), which can significantly improve the capability of extracting inter-frame information and reconstruction. To achieve this goal, we propose a Pyramid Flow-Guided Deformable Convolution Network (Pyramid FG-DCN) and incorporate Swin Transformer Blocks and Groups as our main backbone. More specifically, we combine optical flows and deformable convolutions, hence our BSRT can handle misalignment and aggregate the potential texture information in multi-frames more efficiently. In addition, our Transformer-based structure can capture long-range dependency to further improve the performance. The evaluation on both synthetic and real-world tracks demonstrates that our approach achieves a new state-of-the-art in BurstSR task. Further, our BSRT wins the championship in the NTIRE2022 Burst Super-Resolution Challenge.

Comparison with State-of-the-art Burst Super-Resolution Methods

Overview Architecture

Dependencies

• OS: Ubuntu 18.04
• Python: Python 3.7
• nvidia :
  • cuda: 10.1
  • cudnn: 7.6.1
• Other reference requirements

Quick Start

1.Create a conda virtual environment and activate it

conda create -n pytorch_1.6 python=3.7
source activate pytorch_1.6

2.Install PyTorch and torchvision following the official instructions

conda install pytorch==1.6.0 torchvision==0.7.0 cudatoolkit=10.1 -c pytorch

3.Install build requirements

pip3 install -r requirements.txt

4.Install DCN

cd DCNv2
python3 setup.py build develop # build
python3 test.py # run examples and check

Training

We provide all pretrained model weights here.

For Synthetic data

cd code/synthetic/bsrt
# Modify the root path of training dataset and model etc.
# The number of GPUs should be more than 1
python main.py --n_GPUs 8 --print_every 40 --lr 0.0001 --decay 150-300 --save bsrt_tiny --model BSRT --fp16 --model_level S --swinfeature --batch_size 32 --burst_size 14 --patch_size 256

For Real-World data

cd code/real/bsrt
# Modify the root path of training dataset and model etc.
# The number of GPUs should be more than 1
python main.py --n_GPUs 8 --print_every 20 --lr 0.00005 --decay 40-80 --save bsrt_tiny --model BSRT --fp16 --model_level S --swinfeature --batch_size 8 --burst_size 14 --patch_size 80 --pre_train ../../synthetic/train_log/bsrt/real_models/bsrt_tiny/bsrt_best_epoch.pth 

The pretrained PWC-Net model can be downloaded here.

Test

For Synthetic data

# Modify the path of test dataset and the path of the trained model
python test_synburst.py --n_GPUs 1 --model BSRT --model_level S --swinfeature --burst_size 14 --patch_size 384 --pre_train ../train_log/bsrt/real_models/bsrt_tiny/bsrt_best_epoch.pth --root /data/dataset/ntire21/burstsr/synthetic

For Real-World data

# Modify the path of test dataset and the path of the trained model
python test_real.py --n_GPUs 1 --model BSRT --model_level S --swinfeature --batch_size 1 --burst_size 14 --patch_size 80 --pre_train ../train_log/bsrt/real_models/bsrt_tiny/bsrtbest_epoch.pth --root /data/dataset/ntire21/burstsr/real

Results

Comparison on Synthetic dataset

Comparison on Real-World dataset

Citations

If our code helps your research or work, please consider citing our paper. The following is a BibTeX reference.

@inproceedings{luo2022bsrt,
  title={BSRT: Improving Burst Super-Resolution with Swin Transformer and Flow-Guided Deformable Alignment},
  author={Luo, Ziwei and Li, Youwei and Cheng, Shen and Yu, Lei and Wu, Qi and Wen, Zhihong and Fan, Haoqiang and Sun, Jian and Liu, Shuaicheng},
  booktitle={Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition},
  pages={998--1008},
  year={2022}
}

Contact

email: [ziwei.ro@gmail.com]