通过标签相关性提升多标签分类性能,改进集成分类链融合方法。
Exploring label correlations using decision templates for ensemble of classifier chains
- 利用标签间的依赖关系设计新的决策模板融合策略
- 在多数指标上优于传统融合方法和堆叠策略
- 适合需要捕捉标签关联的多标签分类任务
集成多标签方法在提升多标签分类性能方面已被证明有效。其中,集成分类链(Ensemble of Classifier Chains)是广泛应用的方法之一。现有的基于决策模板的融合方案DTECC仅利用单个标签的决策特征进行预测融合,未考虑其他标签可能带来的贡献。为此,本文提出无条件依赖决策模板(UDDTECC),一种在融合过程中显式利用标签间相关性的新方法。该方法使每个标签的分类结果可受其条件相关标签的影响,从而提升整体性能。实验对比了两种传统融合策略及一种基于堆叠的方法,结果表明:所提方法在多数评估指标上均优于现有融合方式。
原文摘要 · Abstract (English)
The use of ensemble-based multi-label methods has been shown to be effective in improving multi-label classification results. One of the most widely used ensemble-based multi-label classifiers is Ensemble of Classifier Chains. Decision templates for Ensemble of Classifier Chains (DTECC) is a fusion scheme based on Decision Templates that combines the predictions of Ensemble of Classifier Chains using information from the decision profile for each label, without considering information about other labels that might contribute to the classified result. Based on DTECC, this work proposes the Unconditionally Dependent Decision Templates for Ensemble of Classifier Chains (UDDTECC) method, a classifier fusion method that seeks to exploit correlations between labels in the fusion process. In this way, the classification of each label in the problem takes into account the label values that are considered conditionally dependent and that can lead to an improvement in the classification performance. The proposed method is experimentally compared with two traditional classifier fusion strategies and with a stacking-based strategy. Empirical evidence shows that using the proposed Decision Templates adaptation can improve the performance compared to the traditionally used fusion schemes on most of the evaluated metrics.
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