arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.06290cs.CV
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AIM 2020年视频极限超分辨率挑战赛:方法和结果

AIM 2020 Challenge on Video Extreme Super-Resolution: Methods and Results

ETH Zürich(苏黎世联邦理工学院);University of Sydney(悉尼大学)
Dario Fuoli, Zhiwu Huang, Shuhang Gu, Radu Timofte, Arnau Raventos, Aryan Esfandiari, Salah Karout, Xuan Xu, Xin Li, Xin Xiong, Jinge Wang, Pablo Navarrete Mich… 展开作者

Dario Fuoli, Zhiwu Huang, Shuhang Gu, Radu Timofte, Arnau Raventos, Aryan Esfandiari, Salah Karout, Xuan Xu, Xin Li, Xin Xiong, Jinge Wang, Pablo Navarrete Michelini, Wenhao Zhang, Dongyang Zhang, Hanwei Zhu, Dan Xia, Haoyu Chen, Jinjin Gu, Zhi Zhang, Tongtong Zhao, Shanshan Zhao, Kazutoshi Akita, Norimichi Ukita, Hrishikesh P S, Densen Puthussery, Jiji C

摘要:

本文回顾了与ECCV 2020上的AIM 2020研讨会相关的视频极限超分辨率挑战。用于学习视频超分辨率(VSR)的常见缩放因子不超过因子4。该区域可以很好地恢复丢失的信息,特别是在HR视频中,其中高频内容主要由纹理细节组成。这项挑战的任务是以16的极端因子升级视频,这会导致更严重的退化,也会影响视频的结构完整性。低分辨率(LR)域中的单个像素对应于高分辨率(HR)域中的256个像素。由于这种大量的信息丢失,很难准确地恢复丢失的信息。轨道1的设置是为了衡量这种苛刻任务的最新技术水平,其中对地面实况的保真度是通过PSNR和SSIM来衡量的。通过生成合理的高频内容,可以在保真度的权衡中实现感知上更高的质量。因此,轨道2旨在生成视觉上令人愉悦的结果,这些结果根据人类感知进行排名,并通过用户研究进行评估。与单图像超分辨率(SISR)相比,VSR可以受益于时间域中的附加信息。然而,这也强加了额外的要求,因为生成的帧需要在时间上一致。

英文摘要:

This paper reviews the video extreme super-resolution challenge associated with the AIM 2020 workshop at ECCV 2020. Common scaling factors for learned video super-resolution (VSR) do not go beyond factor 4. Missing information can be restored well in this region, especially in HR videos, where the high-frequency content mostly consists of texture details. The task in this challenge is to upscale videos with an extreme factor of 16, which results in more serious degradations that also affect the structural integrity of the videos. A single pixel in the low-resolution (LR) domain corresponds to 256 pixels in the high-resolution (HR) domain. Due to this massive information loss, it is hard to accurately restore the missing information. Track 1 is set up to gauge the state-of-the-art for such a demanding task, where fidelity to the ground truth is measured by PSNR and SSIM. Perceptually higher quality can be achieved in trade-off for fidelity by generating plausible high-frequency content. Track 2 therefore aims at generating visually pleasing results, which are ranked according to human perception, evaluated by a user study. In contrast to single image super-resolution (SISR), VSR can benefit from additional information in the temporal domain. However, this also imposes an additional requirement, as the generated frames need to be consistent along time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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