Enhancing Out-of-Distribution Detection with Extended Logit Normalization
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Abstract (arXiv)
noindent Out-of-distribution (OOD) detection is essential for the safe deployment of machine learning models. Extensive work has focused on devising various scoring functions for detecting OOD samples, while only a few studies focus on training neural networks using certain model calibration objectives, which often lead to a compromise in predictive accuracy and support only limited choices of scoring functions. In this work, we first identify the feature collapse phenomena in Logit Normalization (LogitNorm), then propose a novel hyperparameter-free formulation that significantly benefits a wide range of post-hoc detection methods. To be specific, we devise a feature distance-awareness loss term in addition to LogitNorm, termed ELogitNorm, which enables improved OOD detection and in-distribution (ID) confidence calibration. Extensive experiments across standard benchmarks demonstrate that our approach outperforms state-of-the-art training-time methods in OOD detection while maintaining strong ID classification accuracy. Our code is available on: https://github.com/limchaos/ElogitNorm.
Key facts. Cited by 3 papers in the map (data through 14 Oct 2026). Builds on 51 of its 62 references that are in the map. First posted on arXiv 15 Apr 2025.
Builds on
51 of 62 references.
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38 more
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Citing papers per year: 2025: 2; 2026: 1.
3 papers.
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