Outlier Detection in High Dimensional Data

Kamalov, Firuz
Leung, Ho Hon
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World Scientific Publishing Co. Pte Ltd
High-dimensional data poses unique challenges in outlier detection process. Most of the existing algorithms fail to properly address the issues stemming from a large number of features. In particular, outlier detection algorithms perform poorly on dataset of small size with a large number of features. In this paper, we propose a novel outlier detection algorithm based on principal component analysis and kernel density estimation. The proposed method is designed to address the challenges of dealing with high-dimensional data by projecting the original data onto a smaller space and using the innate structure of the data to calculate anomaly scores for each data point. Numerical experiments on synthetic and real-life data show that our method performs well on high-dimensional data. In particular, the proposed method outperforms the benchmark methods as measured by F1-score. Our method also produces better-than-average execution times compared with the benchmark methods. © 2020 World Scientific Publishing Co.
This article is not available at CUD collection. The version of scholarly record of this Article is published in Journal of Information & Knowledge Management (2020), available online at: https://doi.org/10.1142/S0219649220400134
high dimensional data, KDE, Outlier detection, PCA, Anomaly detection, Large dataset, Numerical methods, Principal component analysis, Signal detection, Statistics, Data points, Innate structure, Kernel Density Estimation, Numerical experiments, Outlier detection algorithm, Outlier detection in high-dimensional datum, Real life data, Clustering algorithms
Kamalov, F., & Leung, H. H. (2020). Outlier detection in high dimensional data. Journal of Information & Knowledge Management, 19(1), 2040013. https://doi.org/10.1142/S0219649220400134