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  4. Benefiting From Bicubically Down-Sampled Images for Learning Real-World Image Super-Resolution
 
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conference paper

Benefiting From Bicubically Down-Sampled Images for Learning Real-World Image Super-Resolution

Rad, Mohammad Saeed  
•
Yu, Thomas  
•
Musat, Claudiu  
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2021
Proceedings of the IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2021
Winter Conference on Applications of Computer Vision (WACV)

Super-resolution (SR) has traditionally been based on pairs of high-resolution images (HR) and their low-resolution (LR) counterparts obtained artificially with bicubic downsampling. However, in real-world SR, there is a large variety of realistic image degradations and analytically modeling these realistic degradations can prove quite difficult. In this work, we propose to handle real-world SR by splitting this ill-posed problem into two comparatively more well-posed steps. First, we train a network to transform real LR images to the space of bicubically downsampled images in a supervised manner, by using both real LR/HR pairs and synthetic pairs. Second, we take a generic SR network trained on bicubically downsampled images to super-resolve the transformed LR image. The first step of the pipeline addresses the problem by registering the large variety of degraded images to a common, well understood space of images. The second step then leverages the already impressive performance of SR on bicubically downsampled images, sidestepping the issues of end-to-end training on datasets with many different image degradations. We demonstrate the effectiveness of our proposed method by comparing it to recent methods in real-world SR and show that our proposed approach outperforms the state-of-the-art works in terms of both qualitative and quantitative results, as well as results of an extensive user study conducted on several real image datasets.

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Type
conference paper
DOI
10.1109/WACV48630.2021.00163
Author(s)
Rad, Mohammad Saeed  
•
Yu, Thomas  
•
Musat, Claudiu  
•
Kemal Ekenel, Hazim  
•
Bozorgtabar, Seyedbehzad  
•
Thiran, Jean-Philippe  
Date Issued

2021

Published in
Proceedings of the IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2021
Start page

1590

End page

1599

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LTS5  
Event nameEvent placeEvent date
Winter Conference on Applications of Computer Vision (WACV)

Virtual

January 5-9, 2021

Available on Infoscience
January 8, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/174545
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