2024

Wang Yingqian; Liang Zhengyu; Chen Qianyu; Wang Longguang; Yang Jungang; Timofte Radu; Guo Yulan; Chao Wentao; Kan Yiming; Wang Xuechun; Duan Fuqing; Wang Guanghui; Xia Wang; Wang Ziqi; Yan Yue; Xia P

In this report we summarize the 2nd NTIRE challenge on light field (LF) image super-resolution (SR) with a focus on new methods and results. This challenge aims at super-resolving LF images under the standard bicubic downsampling degradation with a magnification factor of x4. Compared with single image SR the major challenge of LF image SR lies in how to exploit complementary angular information from plenty of views with varying disparities. This year of challenge has two tracks including one track on fidelity (i.e. restoration accuracy in terms of PSNR) only and the other track on fidelity with an extra constraint on model size and computational cost. In total 125 participants were successfully registered for this challenge and 9 teams have successfully submitted results with PSNR scores higher than the baseline methods. We report the solutions proposed by the participants and summarize their common trends and useful tricks. We hope this challenge can stimulate future research and inspire new ideas in LF image SR.