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arXiv 2005.13222cs.CV
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放大以人为中心的视频的细节

Zoom in to the details of human-centric videos

Tsinghua University(清华大学);The Hong Kong University of Science and Technology(香港科技大学)

Guanghan Li, Yaping Zhao, Mengqi Ji, Xiaoyun Yuan, Lu Fang

摘要:

对于以人为中心的视频,呈现高分辨率(HR)的人类外观始终是至关重要的。然而,现有的成像设备很难始终捕捉到HR细节。现有的超分辨率算法仅仅考虑图像块的普遍和低层先验,几乎不能缓解这个问题。相比之下,我们的算法通过利用由HR人类外观定义的高级先验来偏向于人体超分辨率。首先,运动分析模块从HR参考视频中提取固有的运动模式以细化低分辨率(LR)序列的姿态估计。此外,人体重建模块将参考帧中的HR纹理映射到3D网格模型上。因此,输入的LR视频得到超分辨率的HR人类序列是在原始LR视频以及很少的HR参考帧的条件下生成的。在现有数据集和混合摄像机采集的真实数据集上的实验表明,与传统方法相比,该方法生成的人体视觉质量更好。

英文摘要:

Presenting high-resolution (HR) human appearance is always critical for the human-centric videos. However, current imagery equipment can hardly capture HR details all the time. Existing super-resolution algorithms barely mitigate the problem by only considering universal and low-level priors of im-age patches. In contrast, our algorithm is under bias towards the human body super-resolution by taking advantage of high-level prior defined by HR human appearance. Firstly, a motion analysis module extracts inherent motion pattern from the HR reference video to refine the pose estimation of the low-resolution (LR) sequence. Furthermore, a human body reconstruction module maps the HR texture in the reference frames onto a 3D mesh model. Consequently, the input LR videos get super-resolved HR human sequences are generated conditioned on the original LR videos as well as few HR reference frames. Experiments on an existing dataset and real-world data captured by hybrid cameras show that our approach generates superior visual quality of human body compared with the traditional method.

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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