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A PDE Solution of Brownian Warping

机译:布朗变形的PDE解决方案

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摘要

A Brownian motion model in the group of diffeomorphisms has been introduced as creating a least committed prior on warps. This prior is source destination symmetric, fulfills a natural semi-group property for warps, and with probability 1 create invertible warps. In this paper, we formulate a Partial Differential Equation for obtaining the maximum likelihood warp given matching constraints derived from the images. We solve for the free boundary conditions, and the bias toward smaller areas in the finite domain setting. Furthermore, we demonstrate the technique on 2D images, and show that the obtained warps are also in practice source-destination symmetric.
机译:在微分同形群中引入了布朗运动模型,以在扭曲上创建最少承诺的先验。该先验是源目的地对称的,满足了翘曲的自然半群性质,并以1的概率创建了可逆翘曲。在本文中,我们给出了一个偏微分方程,用于在从图像导出的匹配约束条件下获得最大似然扭曲。我们求解自由边界条件,以及在有限域设置中偏向较小区域的问题。此外,我们在2D图像上演示了该技术,并表明所获得的扭曲在实践中也与源-目标对称。

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