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    • 49. 发明授权
    • System and method for estimating velocity from image sequence with first order continuity
    • 从一阶连续性的图像序列估计速度的系统和方法
    • US08509489B2
    • 2013-08-13
    • US12892715
    • 2010-09-28
    • Wei Chen
    • Wei Chen
    • G06K9/00G01D21/00
    • G01S7/295G01C13/006
    • A computer based method for estimating surface velocity based on a time series of at least two images of a same portion of the ocean surface by solving a heat equation having unknown parameters of heat source s and surface velocity components u and v. The images can be infrared or thermal images from the AVHRR or other images. Assign a pattern of sub-arrays with number of pixels in each sub-array sufficient to overdetermine the heat equation without the need to apply divergence and vorticity constraints. Define the heat equation for each interior pixel using bilinear interpolation at each interior based on solutions at the corner pixels. Use linear regression to solve for the unknown parameters u, v, and s for each corner pixel by minimizing total error of the heat equation in finite difference form at all pixels, and find the parameters at each remaining point with bilinear interpolation.
    • 一种基于计算机的方法,用于通过求解具有热源s和表面速度分量u和v的未知参数的热方程,基于海洋表面的相同部分的至少两个图像的时间序列来估计表面速度。图像可以是 来自AVHRR或其他图像的红外或热图像。 分配每个子阵列中具有像素数目的子阵列,以足以超过确定热方程,而不需要应用发散和涡度约束。 根据角点像素处的解决方案,在每个内部使用双线性插值来定义每个内部像素的热方程。 使用线性回归法,通过最小化所有像素上有限差分形式的热方程的总误差来求解每个拐角像素的未知参数u,v和s,并用双线性插值在每个剩余点找到参数。