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The Entropy Enigma: Success and Failure of Entropy Minimization
May 9, 2024, 4:45 a.m. | Ori Press, Ravid Shwartz-Ziv, Yann LeCun, Matthias Bethge
cs.CV updates on arXiv.org arxiv.org
Abstract: Entropy minimization (EM) is frequently used to increase the accuracy of classification models when they're faced with new data at test time. EM is a self-supervised learning method that optimizes classifiers to assign even higher probabilities to their top predicted classes. In this paper, we analyze why EM works when adapting a model for a few steps and why it eventually fails after adapting for many steps. We show that, at first, EM causes the …
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