arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2101.04822eess.IVcs.CV
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视频快照压缩成像的即插即用算法

Plug-and-Play Algorithms for Video Snapshot Compressive Imaging

Bell Labs(贝尔实验室);Massachusetts Institute of Technology(麻省理工学院);Tsinghua University(清华大学)

Xin Yuan, Yang Liu, Jinli Suo, Frédo Durand, Qionghai Dai

摘要:

我们考虑视频快照压缩成像(SCI),它捕获高速视频使用低速2D传感器(检测器)的重建问题。SCI的基本原理是用不同的掩码调制连续的高速帧,然后将这些编码的帧集成到传感器上的快照中,因此传感器可以是低速的。一方面,视频SCI具有低带宽、低功耗、低成本等优点。另一方面,将SCI应用于我们日常生活中的大规模问题(HD或UHD视频)仍然具有挑战性,其中一个瓶颈在于重建算法。现有算法要么太慢(迭代优化算法),要么对编码过程不灵活(基于深度学习的端到端网络)。在本文中,我们开发了快速和灵活的算法SCI的基础上,即插即用(PPENS)的框架。在PnP-ADMM算法的基础上,进一步提出了计算量更小的PnP-GAP(广义交替投影)算法。我们首先使用图像深度去噪先验来证明Pandora可以从快照测量中恢复30帧的UHD彩色视频。由于视频具有很强的时间相关性,通过采用视频深度去噪先验,我们实现了结果的显着改善。此外,我们扩展了所提出的PADER算法的彩色SCI系统使用马赛克传感器,其中每个像素只捕获红色,绿色或蓝色通道。提出了一种联合重构和去马赛克的方法,用于彩色视频SCI系统的灵活和高质量的重构。仿真和真实数据集上的大量结果验证了我们提出的算法的优越性。

英文摘要:

We consider the reconstruction problem of video snapshot compressive imaging (SCI), which captures high-speed videos using a low-speed 2D sensor (detector). The underlying principle of SCI is to modulate sequential high-speed frames with different masks and then these encoded frames are integrated into a snapshot on the sensor and thus the sensor can be of low-speed. On one hand, video SCI enjoys the advantages of low-bandwidth, low-power and low-cost. On the other hand, applying SCI to large-scale problems (HD or UHD videos) in our daily life is still challenging and one of the bottlenecks lies in the reconstruction algorithm. Exiting algorithms are either too slow (iterative optimization algorithms) or not flexible to the encoding process (deep learning based end-to-end networks). In this paper, we develop fast and flexible algorithms for SCI based on the plug-and-play (PnP) framework. In addition to the PnP-ADMM method, we further propose the PnP-GAP (generalized alternating projection) algorithm with a lower computational workload. We first employ the image deep denoising priors to show that PnP can recover a UHD color video with 30 frames from a snapshot measurement. Since videos have strong temporal correlation, by employing the video deep denoising priors, we achieve a significant improvement in the results. Furthermore, we extend the proposed PnP algorithms to the color SCI system using mosaic sensors, where each pixel only captures the red, green or blue channels. A joint reconstruction and demosaicing paradigm is developed for flexible and high quality reconstruction of color video SCI systems. Extensive results on both simulation and real datasets verify the superiority of our proposed algorithm.

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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