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arXiv 1901.03124cs.LGstat.ML
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基于两个单类分类器的单类分类主动学习

Active Learning for One-Class Classification Using Two One-Class Classifiers

Institute of Signal Processing(信号处理研究所)

Patrick Schlachter, Bin Yang

摘要:

本文介绍了一种新的,通用的主动学习方法的一类分类。在机器学习领域,主动学习方法在减少人工标注的工作量方面发挥着重要作用。虽然在过去的几年里已经提出了许多主动学习方法,他们大多数是限制在二进制或多类问题。单类分类器在训练过程中只使用来自一个类(所谓的目标类)的样本,因此需要特殊的主动学习策略。为一类分类提出的少数策略要么受到特定一类分类器的限制,要么其性能取决于对数据集的特定假设,如不平衡。我们提出的方法基于使用两个单类分类器,一个用于所需的目标类,一个用于所谓的离群值类。它允许发明新的查询策略,使用二进制查询策略和定义简单的停止标准。在此基础上提出了两种查询策略。所提供的实验将所提出的方法与各种数据集上的已知策略进行比较,并在几乎所有情况下显示出改进的结果。

英文摘要:

This paper introduces a novel, generic active learning method for one-class classification. Active learning methods play an important role to reduce the efforts of manual labeling in the field of machine learning. Although many active learning approaches have been proposed during the last years, most of them are restricted on binary or multi-class problems. One-class classifiers use samples from only one class, the so-called target class, during training and hence require special active learning strategies. The few strategies proposed for one-class classification either suffer from their limitation on specific one-class classifiers or their performance depends on particular assumptions about datasets like imbalance. Our proposed method bases on using two one-class classifiers, one for the desired target class and one for the so-called outlier class. It allows to invent new query strategies, to use binary query strategies and to define simple stopping criteria. Based on the new method, two query strategies are proposed. The provided experiments compare the proposed approach with known strategies on various datasets and show improved results in almost all situations.

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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