Micro-clustering by data polishing

Takeaki Uno, Hiroki Maegawa, Takanobu Nakahara, Yukinobu Hamuro, Ryo Yoshinaka, Makoto Tatsuta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)


We address the problem of un-supervised soft-clustering that we call micro-clustering. The aim of the problem is to enumerate all groups composed of records strongly related to each other, whereas standard clustering methods find boundaries at which records are few. The existing methods have several weak points; generation of intractable amounts of clusters, biased size distributions, lack of robustness, etc. We propose a new methodology data polishing. Data polishing clarifies the cluster structures in the data by perturbating the data according to feasible hypothesis. More precisely, for graph clustering problems, data polishing replaces dense subgraphs that would correspond to clusters by cliques, and deletes edges not included in any dense subgraph. The clusters are clarified as maximal cliques, thus are easy to find, and the number of maximal cliques is reduced to tractable numbers. We also propose an efficient algorithm so that the computation is done in few minutes even for large scale data. The computational experiments demonstrate the efficiency of our formulation and algorithm, i.e., the number of solutions is small, such as 1,000, the members of each group are deeply related, and the computation time is short.

Original languageEnglish
Title of host publicationProceedings - 2017 IEEE International Conference on Big Data, Big Data 2017
EditorsJian-Yun Nie, Zoran Obradovic, Toyotaro Suzumura, Rumi Ghosh, Raghunath Nambiar, Chonggang Wang, Hui Zang, Ricardo Baeza-Yates, Ricardo Baeza-Yates, Xiaohua Hu, Jeremy Kepner, Alfredo Cuzzocrea, Jian Tang, Masashi Toyoda
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages7
ISBN (Electronic)9781538627143
Publication statusPublished - 2017 Jul 1
Event5th IEEE International Conference on Big Data, Big Data 2017 - Boston, United States
Duration: 2017 Dec 112017 Dec 14

Publication series

NameProceedings - 2017 IEEE International Conference on Big Data, Big Data 2017


Other5th IEEE International Conference on Big Data, Big Data 2017
Country/TerritoryUnited States


  • algorithm
  • clustering
  • data cleaning
  • pattern mining

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems
  • Information Systems and Management
  • Control and Optimization


Dive into the research topics of 'Micro-clustering by data polishing'. Together they form a unique fingerprint.

Cite this