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Understanding Why Label Smoothing Degrades Selective Classification and How to Fix It
March 25, 2024, 4:41 a.m. | Guoxuan Xia, Olivier Laurent, Gianni Franchi, Christos-Savvas Bouganis
cs.LG updates on arXiv.org arxiv.org
Abstract: Label smoothing (LS) is a popular regularisation method for training deep neural network classifiers due to its effectiveness in improving test accuracy and its simplicity in implementation. "Hard" one-hot labels are "smoothed" by uniformly distributing probability mass to other classes, reducing overfitting. In this work, we reveal that LS negatively affects selective classification (SC) - where the aim is to reject misclassifications using a model's predictive uncertainty. We first demonstrate empirically across a range of …
abstract accuracy arxiv classification classifiers cs.ai cs.cv cs.lg deep neural network hot implementation improving labels network neural network overfitting popular probability simplicity test training type understanding
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