arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.03869cs.LGcs.CRcs.NAmath.NA
收藏

基于均匀稀疏表示的字典学习异常检测

Dictionary Learning with Uniform Sparse Representations for Anomaly Detection

University of Bucharest(布加勒斯特大学)

Paul Irofti, Cristian Rusu, Andrei Pătraşcu

摘要:

许多应用,如音频和图像处理表明,稀疏表示是一个强大的和有效的信号建模技术。寻找一个最佳字典,同时产生的数据的稀疏表示和最小的近似误差是一个困难的问题,接近字典学习(DL)。我们研究了DL如何在信号数据集中检测异常样本。在本文中,我们使用一个特定的DL制定,寻求统一的稀疏表示模型来检测数据集中的大多数样本的底层子空间,使用K-SVD型算法。数值模拟表明,可以有效地使用该子空间来区分规则数据点上的异常。

英文摘要:

Many applications like audio and image processing show that sparse representations are a powerful and efficient signal modeling technique. Finding an optimal dictionary that generates at the same time the sparsest representations of data and the smallest approximation error is a hard problem approached by dictionary learning (DL). We study how DL performs in detecting abnormal samples in a dataset of signals. In this paper we use a particular DL formulation that seeks uniform sparse representations model to detect the underlying subspace of the majority of samples in a dataset, using a K-SVD-type algorithm. Numerical simulations show that one can efficiently use this resulted subspace to discriminate the anomalies over the regular data points.

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。

↑