A fast density peaks clustering algorithm with sparse search

Given a large unlabeled set of complex data, how to efficiently and effectively group them into clusters remains a challenging problem. Density peaks clustering (DPC) algorithm is an emerging algorithm, which identifies cluster centers based on a decision graph. Without setting the number of cluster...

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Bibliographic Details
Published in:Information sciences Vol. 554; pp. 61 - 83
Main Authors: Xu, Xiao, Ding, Shifei, Wang, Yanru, Wang, Lijuan, Jia, Weikuan
Format: Journal Article
Language:English
Published: Elsevier Inc 01.04.2021
Subjects:
Computational complexity
DPC algorithm
Fewer distance calculations
Similarity matrix
Sparse search strategy
Sparse search strategy
Similarity matrix
DPC algorithm
Computational complexity
Fewer distance calculations
ISSN:0020-0255, 1872-6291
Online Access:Get full text
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Summary:Given a large unlabeled set of complex data, how to efficiently and effectively group them into clusters remains a challenging problem. Density peaks clustering (DPC) algorithm is an emerging algorithm, which identifies cluster centers based on a decision graph. Without setting the number of cluster centers, DPC can effectively recognize the clusters. However, the similarity between every two data points must be calculated to construct a decision graph, which results in high computational complexity. To overcome this issue, we propose a fast sparse search density peaks clustering (FSDPC) algorithm to enhance the DPC, which constructs a decision graph with fewer similarity calculations to identify cluster centers quickly. In FSDPC, we design a novel sparse search strategy to measure the similarity between the nearest neighbors of each data points. Therefore, FSDPC can enhance the efficiency of the DPC while maintaining satisfactory results. We also propose a novel random third-party data point method to search the nearest neighbors, which introduces no additional parameters or high computational complexity. The experimental results on synthetic datasets and real-world datasets indicate that the proposed algorithm consistently outperforms the DPC and other state-of-the-art algorithms.
ISSN:0020-0255
1872-6291
DOI:10.1016/j.ins.2020.11.050