This paper summarizes the 3rd NTIRE challenge on stereo image super-resolution (SR) with a focus on new solutions and results. The task of this challenge is to super-resolve a low-resolution stereo image pair to a high-resolution one with a magnification factor of x4 under a limited computational budget. Compared with single image SR, the major challenge of this challenge lies in how to exploit additional information in another viewpoint and how to maintain stereo consistency in the results. This challenge has 2 tracks, including one track on bicubic degradation and one track on real degradations. In total, 108 and 70 participants were successfully registered for each track, respectively. In the test phase, 14 and 13 teams successfully submitted valid results with PSNR (RGB) scores better than the baseline. This challenge establishes a new benchmark for stereo image SR.

翻译：本文总结了第三届NTIRE立体图像超分辨率挑战赛，重点关注新方法与结果。本次挑战赛的任务是在有限的计算资源下，将低分辨率立体图像对以4倍放大因子超分辨为高分辨率图像。与单图像超分辨率相比，本次挑战的主要难点在于如何利用另一视角的附加信息，以及如何在结果中保持立体一致性。本次挑战赛设有两个赛道，包括双三次退化赛道和真实退化赛道。两个赛道分别有108名和70名参与者成功注册。在测试阶段，分别有14支和13支团队成功提交了PSNR（RGB）分数优于基准的有效结果。本次挑战赛为立体图像超分辨率建立了新的基准。