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arXiv 2108.09476cs.CV
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从公共网络摄像头进行3D重建

3D Reconstruction from public webcams

ETH Zurich(苏黎世联邦理工学院)

Tianyu Wu, Konrad Schindler, Cenek Albl

摘要:

我们调查的可能性,从两个或多个重叠的摄像头流的三维场景重建。越来越多的网络摄像头观察名胜古迹,并向公众开放。问题自然出现了:我们可以将这个免费的数据源用于3D计算机视觉吗?事实证明,从网络摄像头流重建场景结构的任务与标准的运动恢复结构(SfM)非常不同,并且传统的SfM流水线失败。在网络摄像头设置中,同一场景的视图很少,在大多数情况下只有最少两个视图。这些视点通常具有大的基线和/或尺度差异,它们的重叠相当有限,并且除了未知的内部和外部校准之外,它们的时间同步也是未知的。另一方面,它们在长时间跨度内连续记录相当大的视场,以便定期观察动态物体在场景中移动。我们展示了如何利用计算机视觉的几个领域的最新进展,以适应SfM重建这个特定的情况下,重建未知的相机姿态,三维场景结构,和动态对象的三维轨迹。

英文摘要:

We investigate the possibility of 3D scene reconstruction from two or more overlapping webcam streams. A large, and growing, number of webcams observe places of interest and are publicly accessible. The question naturally arises: can we make use of this free data source for 3D computer vision? It turns out that the task to reconstruct scene structure from webcam streams is very different from standard structure-from-motion (SfM), and conventional SfM pipelines fail. In the webcam setting there are very few views of the same scene, in most cases only the minimum of two. These viewpoints often have large baselines and/or scale differences, their overlap is rather limited, and besides unknown internal and external calibration also their temporal synchronisation is unknown. On the other hand, they record rather large fields of view continuously over long time spans, so that they regularly observe dynamic objects moving through the scene. We show how to leverage recent advances in several areas of computer vision to adapt SfM reconstruction to this particular scenario and reconstruct the unknown camera poses, the 3D scene structure, and the 3D trajectories of dynamic objects.

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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