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arXiv 1802.04852stat.MLcs.LGmath.AT
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用于拓扑数据分析的持久化码本

Persistence Codebooks for Topological Data Analysis

Jagiellonian University(雅盖隆大学);Swansea University(斯旺西大学)

Bartosz Zielinski, Michal Lipinski, Mateusz Juda, Matthias Zeppelzauer, Pawel Dlotko

摘要:

持久同源性(PH)是一种严格的数学理论,它以持久性图(PD)的形式提供了一个强大的数据描述符,这些持久性图是2D多点集。然而,它们的可变大小使得它们难以与典型的机器学习工作流程相结合。在本文中,我们介绍持久码本,一种新的表达和歧视性的固定大小的矢量表示PD。为此,我们适应袋字(BoW),矢量的局部聚集的描述符(VLAD)和费舍尔矢量(FV)的量化PD。持久码本以便于机器学习和统计分析的方式表示PD,并且具有许多有利的实际和理论属性,包括1-Wasserstein稳定性。我们评估了几个异构数据集的表示,并显示其(高)的区分能力。我们的方法比其他方法在更短的时间内实现了最先进的性能。

英文摘要:

Persistent homology (PH) is a rigorous mathematical theory that provides a robust descriptor of data in the form of persistence diagrams (PDs) which are 2D multisets of points. Their variable size makes them, however, difficult to combine with typical machine learning workflows. In this paper we introduce persistence codebooks, a novel expressive and discriminative fixed-size vectorized representation of PDs. To this end, we adapt bag-of-words (BoW), vectors of locally aggregated descriptors (VLAD) and Fischer vectors (FV) for the quantization of PDs. Persistence codebooks represent PDs in a convenient way for machine learning and statistical analysis and have a number of favorable practical and theoretical properties including 1-Wasserstein stability. We evaluate the presented representations on several heterogeneous datasets and show their (high) discriminative power. Our approach achieves state-of-the-art performance and beyond in much less time than alternative approaches.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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