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arXiv 1503.02727cs.CV
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基于运动流模型的空间复用摄像机视频压缩感知

Video Compressive Sensing for Spatial Multiplexing Cameras using Motion-Flow Models

Carnegie Mellon University(卡内基梅隆大学);Rice University(莱斯大学);Cornell University(康奈尔大学)

Aswin C. Sankaranarayanan, Lina Xu, Christoph Studer, Yun Li, Kevin Kelly, Richard G. Baraniuk

摘要:

空间复用相机(SMC)通过使用空间光调制器(例如,数字微镜装置)和一些光学传感器。该方法可用于全帧传感器太昂贵(例如,对于短波红外波长)或不可用。现有的SMC系统使用来自压缩感知(CS)的技术来重建静态场景。然而,对于视频,现有的获取和恢复方法提供较差的质量。在本文中,我们提出了CS多尺度视频(CS-MUVI)的传感和恢复框架,高质量的视频采集和恢复使用SMC。我们的框架具有新颖的传感矩阵,使低分辨率视频预览的有效计算,同时使高分辨率视频恢复使用凸优化。为了进一步提高重构视频的质量,我们从低分辨率预览中提取光流估计,并将其作为恢复过程中的约束。我们证明了我们的CS-MUVI框架的合成和实测SMC视频数据的主机的功效,我们表明,高质量的视频可以恢复在大致$60\times$压缩。

英文摘要:

Spatial multiplexing cameras (SMCs) acquire a (typically static) scene through a series of coded projections using a spatial light modulator (e.g., a digital micro-mirror device) and a few optical sensors. This approach finds use in imaging applications where full-frame sensors are either too expensive (e.g., for short-wave infrared wavelengths) or unavailable. Existing SMC systems reconstruct static scenes using techniques from compressive sensing (CS). For videos, however, existing acquisition and recovery methods deliver poor quality. In this paper, we propose the CS multi-scale video (CS-MUVI) sensing and recovery framework for high-quality video acquisition and recovery using SMCs. Our framework features novel sensing matrices that enable the efficient computation of a low-resolution video preview, while enabling high-resolution video recovery using convex optimization. To further improve the quality of the reconstructed videos, we extract optical-flow estimates from the low-resolution previews and impose them as constraints in the recovery procedure. We demonstrate the efficacy of our CS-MUVI framework for a host of synthetic and real measured SMC video data, and we show that high-quality videos can be recovered at roughly $60\times$ compression.

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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