On Refractive Optical Flow
On Refractive Optical Flow
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关于折射光流
DOI：
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发表时间：
2004
期刊：
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通讯作者：
Serge J. Belongie
中科院分区：
文献类型：
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作者：
Sameer Agarwal;S. Mallick;D. Kriegman;Serge J. Belongie
本文提出了将光流方程推广到折射情况的新方法，并描述了一种从折射物体后面的背景移动时获取的视频序列中恢复物体折射结构的方法。这里的结构是指物体如何扭曲和衰减（或放大）穿过它的光的表示。我们区分背景运动已知和未知的情况。我们表明，当运动是未知的，折射结构只能估计到一个六参数的解决方案，没有额外的信息来源的家庭。在这两种情况下，用于解决的折射结构的方法进行了说明。该算法的性能证明了真实的数据，并提出了应用估计的折射结构的任务的环境抠图和合成的结果。
This paper presents a novel generalization of the optical flow equation to the case of refraction, and it describes a method for recovering the refractive structure of an object from a video sequence acquired as the background behind the refracting object moves. By structure here we mean a representation of how the object warps and attenuates (or amplifies) the light passing through it. We distinguish between the cases when the background motion is known and unknown. We show that when the motion is unknown, the refractive structure can only be estimated up to a six-parameter family of solutions without additional sources of information. Methods for solving for the refractive structure are described in both cases. The performance of the algorithm is demonstrated on real data, and results of applying the estimated refractive structure to the task of environment matting and compositing are presented.