通过自适应权重实现多视图互补学习,提升分类性能。
Adaptive Weighted LSSVM for Multi-View Classification
- 迭代全局耦合机制让各视图相互补偿错误
- 在多个基准数据集上优于现有方法
- 适合需要融合多源信息的分类任务
多视图学习通过整合同一实例的多种表示来提升性能,关键在于有效利用视图间的交互。现有基于核的方法要么依赖融合技术但未显式强制共识或互补协作,要么使用仅支持成对交互的共正则化损失函数,限制了全局协同。本文提出自适应加权最小二乘支持向量机(AW-LSSVM),通过迭代全局耦合机制显式实现所有视图间的互补学习。每轮迭代中,每个视图不仅利用自身数据,还根据其他视图前一轮的误分类情况,通过自适应样本权重引导其纠正错误。我们提出两种权重计算策略:(1) 基于其他视图误分类误差的平均;(2) 基于差异性感知的误差聚合,更强调来自差异较大的视图的错误。实验表明,AW-LSSVM 在多数基准数据集上优于现有方法。
原文摘要 · Abstract (English)
Multi-view learning integrates diverse representations of the same instances and can improve performance when interactions across views are effectively exploited. Most existing kernel-based multi-view learning methods either rely on fusion techniques without explicitly enforcing a consensus or complementary collaboration across views, or use co-regularization-based loss functions that impose only pairwise interactions, thereby limiting global collaboration. We propose AW-LSSVM, an adaptive weighted LS-SVM that explicitly enforces complementary learning across all views through an iterative global coupling mechanism. At each iteration, each view not only learns from its own data but is also guided to compensate for samples misclassified by other views in previous iterations by assigning adaptive sample weights. We introduce two strategies for computing these weights: (1) based on averaging misclassification errors across other views and, (2) based on a dissimilarity-aware error aggregation that puts more emphasis on errors from more dissimilar views. Experiments demonstrate that AW-LSSVM outperforms existing multi-view methods on most benchmark datasets.
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