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arXiv 2008.10320cs.CVcs.AIstat.ML
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单帧与多帧360度全景视频超分辨率联合网络

A Single Frame and Multi-Frame Joint Network for 360-degree Panorama Video Super-Resolution

Xidian University(西安电子科技大学);North China University of Technology(北方工业大学)

Hongying Liu, Zhubo Ruan, Chaowei Fang, Peng Zhao, Fanhua Shang, Yuanyuan Liu, Lijun Wang

摘要:

球形视频,也称为\ang{360}(全景)视频,可以用各种虚拟现实设备(诸如计算机和盔装显示器)观看。他们吸引了大量的兴趣,因为观看球形视频时可以体验到令人敬畏的沉浸感。然而,捕获、存储和传输高分辨率球形视频是极其昂贵的。在本文中,我们提出了一种新的单帧和多帧联合网络(SMFN)从低分辨率的输入恢复高分辨率的球形视频。为了利用像素级帧间一致性,使用可变形卷积来消除目标帧及其相邻帧的特征图之间的运动差异。设计了一种混合注意力机制来增强特征表示能力。采用对偶学习策略约束解的空间,以获得更优解,并提出一种基于加权均方误差的损失函数,以增强赤道区域的超分辨率。这是首次尝试解决球形视频的超分辨率问题,我们从互联网上收集了一个新的数据集,米格全景视频,其中包括204个视频。4个有代表性的视频片段的实验结果证明了所提出的方法的有效性。数据集和代码可在https://github.com/lovepiano/SMFN_For_360VSR上获得。

英文摘要:

Spherical videos, also known as \ang{360} (panorama) videos, can be viewed with various virtual reality devices such as computers and head-mounted displays. They attract large amount of interest since awesome immersion can be experienced when watching spherical videos. However, capturing, storing and transmitting high-resolution spherical videos are extremely expensive. In this paper, we propose a novel single frame and multi-frame joint network (SMFN) for recovering high-resolution spherical videos from low-resolution inputs. To take advantage of pixel-level inter-frame consistency, deformable convolutions are used to eliminate the motion difference between feature maps of the target frame and its neighboring frames. A mixed attention mechanism is devised to enhance the feature representation capability. The dual learning strategy is exerted to constrain the space of solution so that a better solution can be found. A novel loss function based on the weighted mean square error is proposed to emphasize on the super-resolution of the equatorial regions. This is the first attempt to settle the super-resolution of spherical videos, and we collect a novel dataset from the Internet, MiG Panorama Video, which includes 204 videos. Experimental results on 4 representative video clips demonstrate the efficacy of the proposed method. The dataset and code are available at https://github.com/lovepiano/SMFN_For_360VSR.

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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