Rapid determination of particle velocity from space-time images using the Radon transform.
Rapid determination of particle velocity from space-time images using the Radon transform.
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DOI：
10.1007/s10827-009-0159-1
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发表时间：
2010-08
影响因子：
1.2
通讯作者：
Kleinfeld D
中科院分区：
文献类型：
--
作者：
Drew PJ;Blinder P;Cauwenberghs G;Shih AY;Kleinfeld D
激光扫描方法是观察流动颗粒的一种手段，例如血管中红细胞的流动。通常，从由沿血管中心线沿着获得的循环重复的线扫描数据形成的图像中提取颗粒速度;运动导致条纹，条纹的角度是速度的函数。过去的方法利用剪切或旋转的图像和奇异值分解（SVD）自动估计的平均速度在一个时间窗口的数据。在这里，我们提出了一种替代方法，利用Radon变换来计算流动粒子的速度。我们表明，这种方法是超过一个数量级的速度比基于SVD的算法，是更强大的噪声。
Laser-scanning methods are a means to observe streaming particles, such as the flow of red blood cells in a blood vessel. Typically, particle velocity is extracted from images formed from cyclically repeated line-scan data that is obtained along the center-line of the vessel; motion leads to streaks whose angle is a function of the velocity. Past methods made use of shearing or rotation of the images and a Singular Value Decomposition (SVD) to automatically estimate the average velocity in a temporal window of data. Here we present an alternative method that makes use of the Radon transform to calculate the velocity of streaming particles. We show that this method is over an order of magnitude faster than the SVD-based algorithm and is more robust to noise.