An evaluation of optical flow algorithms for background oriented schlieren imaging
An evaluation of optical flow algorithms for background oriented schlieren imaging
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DOI：
10.1007/s00348-008-0572-7
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发表时间：
2009-03-01
影响因子：
2.4
通讯作者：
Ihrke, Ivo
中科院分区：
文献类型：
--
作者：
Atcheson, Bradley;Heidrich, Wolfgang;Ihrke, Ivo
背景定向纹影法（BOS）允许精确的流量测量与一个简单的实验配置。为了估计两个图像之间的每像素位移矢量，BOS系统传统上借用粒子图像测速的基于窗口的算法。在本文中，我们评估了最近的光流法在BOS设置的性能。我们还分析了不同的背景模式的影响，建议在许多尺度上使用一个模式的细节。仿真和真实的数据集的实验表明，光流算法和多尺度背景的结合可以显着提高BOS系统的性能。
The background oriented schlieren method (BOS) allows for accurate flow measurements with a simple experimental configuration. To estimate per-pixel displacement vectors between two images, BOS systems traditionally borrow window-based algorithms from particle image velocimetry. In this paper, we evaluate the performance of more recent optical flow methods in BOS settings. We also analyze the impact of different background patterns, suggesting the use of a pattern with detail at many scales. Experiments with both synthetic and real datasets show that the performance of BOS systems can be significantly improved through a combination of optical flow algorithms and multiscale background.