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- W4221163272 abstract "In modern classification tasks, the number of labels is getting larger and larger, as is the size of the datasets encountered in practice. As the number of classes increases, class ambiguity and class imbalance become more and more problematic to achieve high top-1 accuracy. Meanwhile, Top-K metrics (metrics allowing K guesses) have become popular, especially for performance reporting. Yet, proposing top-K losses tailored for deep learning remains a challenge, both theoretically and practically. In this paper we introduce a stochastic top-K hinge loss inspired by recent developments on top-K calibrated losses. Our proposal is based on the smoothing of the top-K operator building on the flexible perturbed optimizer framework. We show that our loss function performs very well in the case of balanced datasets, while benefiting from a significantly lower computational time than the state-of-the-art top-K loss function. In addition, we propose a simple variant of our loss for the imbalanced case. Experiments on a heavy-tailed dataset show that our loss function significantly outperforms other baseline loss functions." @default.
- W4221163272 created "2022-04-03" @default.
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- W4221163272 date "2022-02-04" @default.
- W4221163272 modified "2023-09-23" @default.
- W4221163272 title "Stochastic smoothing of the top-K calibrated hinge loss for deep imbalanced classification" @default.
- W4221163272 doi "https://doi.org/10.48550/arxiv.2202.02193" @default.
- W4221163272 hasPublicationYear "2022" @default.
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