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arXiv 2302.11297cs.LGcs.AIcs.IRcs.NE
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基于特征向量选择和自调整$k$的近似谱聚类算法

Approximate spectral clustering with eigenvector selection and self-tuned $k$

The University of Sydney(悉尼大学)

Mashaan Alshammari, Masahiro Takatsuka

摘要:

最近出现的谱聚类超越了传统的聚类方法,检测任何形状的集群没有凸性假设。不幸的是,由于计算复杂性为$O(n^3)$,因此对于多个实际应用是不可行的,其中$n$可能很大。这促使研究人员提出了近似谱聚类(ASC)。然而,大多数ASC方法假设簇的数目$k$是已知的。在实践中,手动设置$k$可能是主观的或耗时的。该算法有两个相关性度量估计$k$在两个重要步骤的ASC。一个用于选择跨越嵌入空间的特征向量,另一个用于发现该空间中的聚类数。该算法采用了生长神经气体(GNG)近似,GNG在保持输入数据拓扑结构方面具有优越性。实验结果表明,该算法的效率和竞争能力与类似的方法,手动设置$k$。

英文摘要:

The recently emerged spectral clustering surpasses conventional clustering methods by detecting clusters of any shape without the convexity assumption. Unfortunately, with a computational complexity of $O(n^3)$, it was infeasible for multiple real applications, where $n$ could be large. This stimulates researchers to propose the approximate spectral clustering (ASC). However, most of ASC methods assumed that the number of clusters $k$ was known. In practice, manual setting of $k$ could be subjective or time consuming. The proposed algorithm has two relevance metrics for estimating $k$ in two vital steps of ASC. One for selecting the eigenvectors spanning the embedding space, and the other to discover the number of clusters in that space. The algorithm used a growing neural gas (GNG) approximation, GNG is superior in preserving input data topology. The experimental setup demonstrates the efficiency of the proposed algorithm and its ability to compete with similar methods where $k$ was set manually.

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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