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Dual-Reversed-RS

:rocket: [ECCV2022 Oral] Bringing Rolling Shutter Images Alive with Dual Reversed Distortion

by Zhihang Zhong, Mingdeng Cao, Xiao Sun, Zhirong Wu, Zhongyi Zhou, Yinqiang Zheng, Stephen Lin, and Imari Sato

:point_right: Project website, Video demo

Please leave a ⭐ if you like this project!

TL;DR:

Our goal is to address the challenging task of reversing rolling shutter (RS) scanning process, i.e., extracting undistorted global shutter image sequence from images suffering from RS distortion.

<img src="docs/imgs/teaser.jpg" width="800px" />

Because RS distortion is coupled with factors such as readout time, deadtime, and the relative velocity, models that only exploit the geometric correlation between temporally adjacent images (consecutive scheme) suffer from poor generalization. Although methods of consecutive scheme can correct RS images, they do not know how much correction is correct facing data beyond the dataset (e.g., images captured with different readout setting). We name this as the correction ambiguity problem.

<img src="docs/imgs/ambiguity.jpg" width="580px" />

Instead of consecutive scheme, we introduce another constraint setting that utilizes intra-frame spatial constraints of dual images taken simultaneously but with reversed distortion captured by top-to-bottom (t2b) and bottom-to-top (b2t) scanning. Grounded on the symmetric and complementary nature of dual reversed distortion, we develop a novel end-to-end model, IFED, to overcome the correction ambiguity problem of this task and achieve better generalization and visual quality.

Preparation

Please download the synthesized RS-GOPRO dataset from this link and unzip it to a directory (e.g., ./dataset/).

Please download the pretrained checkpoints from this link and put these checkpoints under ./checkpoints/.

Installation:

conda create -n dual-reversed-rs python=3.8
conda activate dual-reversed-rs
pip install torch==1.11.0+cu113 torchvision==0.12.0+cu113 torchaudio==0.11.0 --extra-index-url https://download.pytorch.org/whl/cu113
pip install tqdm opencv-python tensorboard lpips scikit-image thop

Train

For more details of optional variables, please see para/parameter.py.

CUDA_VISIBLE_DEVICES=0 python main.py --frames 5 --save_dir=./results/ifed_f5/ --data_root=./dataset/

Evaluation

CUDA_VISIBLE_DEVICES=0 python main.py --frames 5 --data_root=./dataset/ --test_only --save_dir=./results/ifed_f5/eval/ test_save_dir=./results/ifed_f5/eval/ --test_checkpoint ./checkpoints/ifed_f5/model_best.pth.tar

Inference

CUDA_VISIBLE_DEVICES=0 python inference.py --frames 9 --rs_img_t2b_path ./demo/s0_t2b.png --rs_img_b2t_path ./demo/s0_b2t.png --test_checkpoints ./checkpoint/ifed_f9/model_best.pth.tar --save_dir ./results/ifed_f9/s0/

(P.S., because the framework is old, we currently only supports single GPU for training, evaluation and inference.)

Citation

If you find this repository useful, please consider citing:

@inproceedings{zhong2022bringing,
  title={Bringing rolling shutter images alive with dual reversed distortion},
  author={Zhong, Zhihang and Cao, Mingdeng and Sun, Xiao and Wu, Zhirong and Zhou, Zhongyi and Zheng, Yinqiang and Lin, Stephen and Sato, Imari},
  booktitle={Computer Vision--ECCV 2022: 17th European Conference, Tel Aviv, Israel, October 23--27, 2022, Proceedings, Part VII},
  pages={233--249},
  year={2022},
  organization={Springer}
}

Acknowledgement

We thank the nice works mentioned below: