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Contrastive Learning with Boosted Memorization
Zhihan Zhou · Jiangchao Yao · Yan-Feng Wang · Bo Han · Ya Zhang

Thu Jul 21 01:35 PM -- 01:40 PM (PDT) @ Hall F
in Deep Learning »

Self-supervised learning has achieved a great success in the representation learning of visual and textual data. However, the current methods are mainly validated on the well-curated datasets, which do not exhibit the real-world long-tailed distribution. Recent attempts to consider self-supervised long-tailed learning are made by rebalancing in the loss perspective or the model perspective, resembling the paradigms in the supervised long-tailed learning. Nevertheless, without the aid of labels, these explorations have not shown the expected significant promise due to the limitation in tail sample discovery or the heuristic structure design. Different from previous works, we explore this direction from an alternative perspective, i.e., the data perspective, and propose a novel Boosted Contrastive Learning (BCL) method. Specifically, BCL leverages the memorization effect of deep neural networks to automatically drive the information discrepancy of the sample views in contrastive learning, which is more efficient to enhance the long-tailed learning in the label-unaware context. Extensive experiments on a range of benchmark datasets demonstrate the effectiveness of BCL over several state-of-the-art methods. Our code is available at https://github.com/MediaBrain-SJTU/BCL.

Keywords: DL: Robustness · DL: Self-Supervised Learning · MISC: Representation Learning · SA: Trustworthy Machine Learning

Author Information

Zhihan Zhou (Cooperative Medianet Innovation Center, Shanghai Jiao Tong University)
Jiangchao Yao (Cooperative Medianet Innovation Center, Shang hai Jiao Tong University)
Yan-Feng Wang (Cooperative medianet innovation center of Shanghai Jiao Tong University)
Bo Han (HKBU / RIKEN)
Ya Zhang (Cooperative Medianet Innovation Center, Shang hai Jiao Tong University)

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