A note on the computation of Wasserstein barycenters

A note on the computation of Wasserstein barycenters
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关于 Wasserstein 重心计算的说明

DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
C. Matrán
C. Matrán
中科院分区:
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文献类型:
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作者:
P. C. Álvarez;E. Barrio;J. A. Cuesta;C. Matrán

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我们考虑关于Wasserstein度规的$mathbb{R}^d$上的有限概率集的质心问题。我们介绍了在一般条件下一致逼近质心的迭代过程。这些涵盖了位置-散射族中的概率情况,包括高斯情况。通过数值模拟说明了迭代过程的性能,表明迭代过程向质心收敛速度快。
We consider the problem of finding the barycenter of a finite set of probabilities on $mathbb{R}^d$ with respect to the Wasserstein metric. We introduce an iterative procedure which consistenly approximates the barycenter under general conditions. These cover the case of probabilities in a location-scatter family, including the Gaussian case. The performance of the iterative procedure is illustrated through numerical simulations, which show fast convergence towards the barycenter.