Sliced Wasserstein Barycenter of Multiple Densities

Sliced Wasserstein Barycenter of Multiple Densities
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多密度瓦瑟斯坦重心切片

DOI:
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发表时间:
2013
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通讯作者:
H. Pfister
H. Pfister
中科院分区:
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文献类型:
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作者:
Nicolas Bonneel;H. Pfister

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最优质量运输问题为不同概率密度函数(pdf)之间的插值提供了一个框架,将一个函数扭曲到另一个函数。在两个任意的pdf之间进行插值是有挑战性的,但是在两个以上的pdf之间进行插值仍然是难以处理的。我们提出了一种基于一维投影的插值方法,该方法可以通过Radon变换有效地求解。我们观察了这种插值在光滑二维函数上的期望平移行为,并证明了它在一些特殊情况下对应于精确插值。
The optimal mass transportation problem provides a framework for interpolating between different probability density functions (pdfs), warping one function toward another. Interpolating between two arbitrary pdfs can be challenging, but interpolating between more than two pdfs just remains untractable. We propose an approxi- mation of such interpolations based on 1D projections, that is efficiently solved via Radon transforms. We observe the expected translational behavior of this interpolation on smooth 2D functions, and prove that it corresponds to the exact interpolant in a few par- ticular cases.