从多个视频流的时空相干几何重建

M. Magnor, Bastian Goldlücke
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引用次数: 16

摘要

通过一帧一帧地重建时变几何,人们忽略了自然运动的连续性,浪费了有关潜在视频图像形成过程的有用信息,并考虑了时间不连续的重建结果。在四维时空中,动态物体的表面描述了一个连续的三维超表面。这种超表面可以隐式地定义为旨在优化光一致性的能量函数的最小值。基于爱德-拉格朗日问题的重新表述,我们从一些同步录像中发现了这个超表面。生成的对象几何形状随时间平滑变化,并且从先前和/或未来的帧中正确地插值出间歇性不可见的对象区域。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spacetime-coherent geometry reconstruction from multiple video streams
By reconstructing time-varying geometry one frame at a time, one ignores the continuity of natural motion, wasting useful information about the underlying video-image formation process and taking into account temporally discontinuous reconstruction results. In 4D spacetime, the surface of a dynamic object describes a continuous 3D hyper-surface. This hyper-surface can be implicitly defined as the minimum of an energy functional designed to optimize photo-consistency. Based on an Eider-Lagrange reformulation of the problem, we find this hyper-surface from a handful of synchronized video recordings. The resulting object geometry varies smoothly over time, and intermittently invisible object regions are correctly interpolated from previously and/or future frames.
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