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DOI: 10.4230/LIPIcs.SOCG.2015.491
URN: urn:nbn:de:0030-drops-51285
URL: http://drops.dagstuhl.de/opus/volltexte/2015/5128/
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Dey, Tamal K. ; Shi, Dayu ; Wang, Yusu

Comparing Graphs via Persistence Distortion

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Abstract

Metric graphs are ubiquitous in science and engineering. For example, many data are drawn from hidden spaces that are graph-like, such as the cosmic web. A metric graph offers one of the simplest yet still meaningful ways to represent the non-linear structure hidden behind the data. In this paper, we propose a new distance between two finite metric graphs, called the persistence-distortion distance, which draws upon a topological idea. This topological perspective along with the metric space viewpoint provide a new angle to the graph matching problem. Our persistence-distortion distance has two properties not shared by previous methods: First, it is stable against the perturbations of the input graph metrics. Second, it is a continuous distance measure, in the sense that it is defined on an alignment of the underlying spaces of input graphs, instead of merely their nodes. This makes our persistence-distortion distance robust against, for example, different discretizations of the same underlying graph. Despite considering the input graphs as continuous spaces, that is, taking all points into account, we show that we can compute the persistence-distortion distance in polynomial time. The time complexity for the discrete case where only graph nodes are considered is much faster.

BibTeX - Entry

@InProceedings{dey_et_al:LIPIcs:2015:5128,
  author =	{Tamal K. Dey and Dayu Shi and Yusu Wang},
  title =	{{Comparing Graphs via Persistence Distortion}},
  booktitle =	{31st International Symposium on Computational Geometry (SoCG 2015)},
  pages =	{491--506},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-83-5},
  ISSN =	{1868-8969},
  year =	{2015},
  volume =	{34},
  editor =	{Lars Arge and J{\'a}nos Pach},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2015/5128},
  URN =		{urn:nbn:de:0030-drops-51285},
  doi =		{10.4230/LIPIcs.SOCG.2015.491},
  annote =	{Keywords: Graph matching, metric graphs, persistence distortion, topological method}
}

Keywords: Graph matching, metric graphs, persistence distortion, topological method
Seminar: 31st International Symposium on Computational Geometry (SoCG 2015)
Issue Date: 2015
Date of publication: 11.06.2015


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