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SAPNet for image deraining

This repository contains the official Pytorch implementation of the paper:

"SAPNet: Segmentation-Aware Progressive Network for Perceptual Contrastive Image Deraining"

Updates:

2021.11.27: The pretrained weight has been uploaded.
2021.11.27: The video deraining result at challenging night-time conditions is at Youtube
2021.11.17: Arxiv Link is available at https://arxiv.org/abs/2111.08892
2021.11.10: This work is accepted and will be presented at WACV 2022.

Abstract

Deep learning algorithms have recently achieved promising deraining performances on both the natural and synthetic rainy datasets. As an essential low-level pre-processing stage, a deraining network should clear the rain streaks and preserve the fine semantic details. However, most existing methods only consider low-level image restoration. That limits their performances at high-level tasks requiring precise semantic information. To address this issue, in this paper, we present a segmentation-aware progressive network (SAPNet) based upon contrastive learning for single image deraining. We start our method with a lightweight derain network formed with progressive dilated units (PDU). The PDU can significantly expand the receptive field and characterize multi-scale rain streaks without the heavy computation on multi-scale images. A fundamental aspect of this work is an unsupervised background segmentation (UBS) network initialized with ImageNet and Gaussian weights. The UBS can faithfully preserve an image's semantic information and improve the generalization ability to unseen photos. Furthermore, we introduce a perceptual contrastive loss (PCL) and a learned perceptual image similarity loss (LPISL) to regulate model learning. By exploiting the rainy image and groundtruth as the negative and the positive sample in the VGG-16 latent space, we bridge the fine semantic details between the derained image and the groundtruth in a fully constrained manner. Comprehensive experiments on synthetic and real-world rainy images show our model surpasses top-performing methods and aids object detection and semantic segmentation with considerable efficacy.

Model Architecture

Click this following link to view the pdf.

Model Architecture Figure

Comparison on Synthetic Rainy Images

From left to right, Rainy, PreNet (CVPR 2019), MSPFN (CVPR 2020), MPRNet (CVPR 2021), SAPNet (Ours)

Comparison on Real-World Rainy Images

From left to right, Rainy, PreNet (CVPR 2019), MSPFN (CVPR 2020), MPRNet (CVPR 2021), SAPNet (Ours)

Prerequisites

Windows or Linux
CUDA 10.0, or CPU
Python 3.6+
Pytorch 1.2+
torchvision 0.4+
opencv-python
scikit-image
numpy

Preparing Dataset

Download training and testing dataset from either link BaiduYun OneDrive
Create a new folder called dataset.
Create sub-folders called train and test under that folder.
Place the unzipped folders into datasets/train/ (training data) and datasets/test/ (testing data)

Training

Run the following script in terminal

python train.py

Testing

Run the following script in terminal

bash main.sh

You can modify the content of main.sh according to your hyperparameters. For example.

python test.py \
      --save_path logs/SAPNet/Model11 \
      --test_data_path datasets/test/Rain100H \
      --output_path results/Rain100H/Model11 \
      --use_dilation True

Hyperparameters

General Hyperparameters

Name	Type	Default	Description
preprocess	bool	False	Whether to preprocess the training images as h5 file
batch_size	int	12	training batch size
epochs	int	100	training epochs
milestone	int	[30,50,80]	when to decay the learning rate
lr	float	0.001	learning rate
save_path	str	logs/SAPNet/Model11	where to save the weight
save_freq	int	1	frequency for saving the weight

Train/Test Hypeparameters

Name	Type	Default	Description
test_data_path	str	datasets/test/Rain100H	testing data path
output_path	str	results/Rain100H/Model11	testing result path
data_path	str	datasets/train/RainTrainH	training data path
use_contrast	bool	True	whether to use contrast learning
use_seg_stage1	bool	True	whether to use segmentation
use_stage1	bool	True	whether to use deraining
use_dilation	bool	True	whether to use dilation
recurrent_iter	int	6	numbers of recurrence
num_of_SegClass	int	21	numbers of segmentation classes

Citations

Please cite the following if you find this repository helpful.

@inproceedings{zheng2022sapnet,
  title={SAPNet: Segmentation-Aware Progressive Network for Perceptual Contrastive Deraining},
  author={Zheng, Shen and Lu, Changjie and Wu, Yuxiong and Gupta, Gaurav},
  booktitle={Proceedings of the IEEE/CVF Winter Conference on Applications of Computer Vision},
  pages={52--62},
  year={2022}
}

Contact

Please reach zhengsh@kean.edu for further questions. You can also open an issue (prefered) or a pull request in this Github repository

Acknowledgement

This repository is borrowed heavily from PreNet. Thanks for sharing!