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arXiv · 1811.07615

An efficient density-based clustering algorithm using reverse nearest neighbour

Stiphen Chowdhury·Renato Cordeiro de Amorim
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Abstract

Density-based clustering is the task of discovering high-density regions of entities (clusters) that are separated from each other by contiguous regions of low-density. DBSCAN is, arguably, the most popular density-based clustering algorithm. However, its cluster recovery capabilities depend on the combination of the two parameters. In this paper we present a new density-based clustering algorithm which uses reverse nearest neighbour (RNN) and has a single parameter. We also show that it is possible to estimate a good value for this parameter using a clustering validity index. The RNN queries enable our algorithm to estimate densities taking more than a single entity into account, and to recover clusters that are not well-separated or have different densities. Our experiments on synthetic and real-world data sets show our proposed algorithm outperforms DBSCAN and its recent variant ISDBSCAN.

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Stiphen Chowdhury, Renato Cordeiro de Amorim. 2018-11-19. An efficient density-based clustering algorithm using reverse nearest neighbour. https://arxiv.org/abs/1811.07615

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