基于对比学习的噪声标签学习的子类一致性正则化

IF 5.5 2区 计算机科学 Q1 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE Neurocomputing Pub Date : 2024-10-28 DOI:10.1016/j.neucom.2024.128759
Xinkai Sun, Sanguo Zhang
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引用次数: 0

摘要

标签噪声对神经网络的一个显著影响是破坏了预测的一致性。之前的研究主要关注单个实例层面的预测一致性,但往往无法充分利用多个实例之间的一致性。本文介绍了子类一致性正则化(SCCR),以最大限度地发挥这种集体一致性预测的潜力。SCCR 通过对每个子类内预测的一致性施加约束,减轻了标签噪声对神经网络的影响。然而,构建高质量的子类是一项艰巨的挑战,我们将其表述为一个特殊的聚类问题。为了有效地建立这些子类,我们采用了基于聚类的对比学习框架。此外,我们还引入了 Q 增强算法来调整对比学习框架,确保与子类构建保持一致。我们使用基准数据集和真实数据集进行了全面的实验,以评估我们提出的方法在不同噪声率的各种情况下的有效性。实验结果清楚地证明了分类准确率的提高,尤其是在具有挑战性的高噪声环境下。此外,即使在存在噪声的情况下,经过改进的对比学习框架也能显著提高子类的质量。此外,我们还以投影头为例,深入探讨了对比学习与噪声标签学习的兼容性。这项研究揭示了之前的研究中一直被忽视的一个方面。
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Subclass consistency regularization for learning with noisy labels based on contrastive learning
A prominent effect of label noise on neural networks is the disruption of the consistency of predictions. While prior efforts primarily focused on predictions’ consistency at the individual instance level, they often fell short of fully harnessing the consistency across multiple instances. This paper introduces subclass consistency regularization (SCCR) to maximize the potential of this collective consistency of predictions. SCCR mitigates the impact of label noise on neural networks by imposing constraints on the consistency of predictions within each subclass. However, constructing high-quality subclasses poses a formidable challenge, which we formulate as a special clustering problem. To efficiently establish these subclasses, we incorporate a clustering-based contrastive learning framework. Additionally, we introduce the Q-enhancing algorithm to tailor the contrastive learning framework, ensuring alignment with subclass construction. We conducted comprehensive experiments using benchmark datasets and real datasets to evaluate the effectiveness of our proposed method under various scenarios with differing noise rates. The results unequivocally demonstrate the enhancement in classification accuracy, especially in challenging high-noise settings. Moreover, the refined contrastive learning framework significantly elevates the quality of subclasses even in the presence of noise. Furthermore, we delve into the compatibility of contrastive learning and learning with noisy labels, using the projection head as an illustrative example. This investigation sheds light on an aspect that has hitherto been overlooked in prior research efforts.
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来源期刊
Neurocomputing
Neurocomputing 工程技术-计算机:人工智能
CiteScore
13.10
自引率
10.00%
发文量
1382
审稿时长
70 days
期刊介绍: Neurocomputing publishes articles describing recent fundamental contributions in the field of neurocomputing. Neurocomputing theory, practice and applications are the essential topics being covered.
期刊最新文献
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