NTIRE 2025 Challenge on Image Super-Resolution ($\times$4): Methods and Results
Journal:
arXiv
Published Date:
Apr 20, 2025
Abstract
This paper presents the NTIRE 2025 image super-resolution ($\times$4)
challenge, one of the associated competitions of the 10th NTIRE Workshop at
CVPR 2025. The challenge aims to recover high-resolution (HR) images from
low-resolution (LR) counterparts generated through bicubic downsampling with a
$\times$4 scaling factor. The objective is to develop effective network designs
or solutions that achieve state-of-the-art SR performance. To reflect the dual
objectives of image SR research, the challenge includes two sub-tracks: (1) a
restoration track, emphasizes pixel-wise accuracy and ranks submissions based
on PSNR; (2) a perceptual track, focuses on visual realism and ranks results by
a perceptual score. A total of 286 participants registered for the competition,
with 25 teams submitting valid entries. This report summarizes the challenge
design, datasets, evaluation protocol, the main results, and methods of each
team. The challenge serves as a benchmark to advance the state of the art and
foster progress in image SR.
