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This research addresses the accuracy-performance trade-off in out-of-distribution detection by optimizing model retention, data sampling, and representation learning. The proposed framework successfully mitigates classification degradation while enhancing robustness across diverse benchmarks, including long-tailed scenarios. It establishes a practical baseline for deploying reliable AI systems that can effectively distinguish between known and unknown data distributions.
Optimizing Three Critical Factors for Practical and Effective OOD Detection Fine-Tuning
arXiv:2308.01030v2 Announce Type: replace-cross Abstract: In out-of-distribution (OOD) detection, fine-tuning with auxiliary outlier data often improves detection performance at the cost of classification accuracy. This trade-off stems from the loss of the original in-distribution (ID) distribution during fine-tuning. To establish a more practical and effective paradigm, we optimize three critical factors: model reminder, data sampling, and representation learning. We propose: (1) Self-Knowledge Distillation (SKD) to mitigate accuracy reduction; (2) Semi-hard Outlier Sampling (SOS) to improve detection efficiency with minimal data; and (3) Outlier-aware Supervised Contrastive Learning (OSCL) to promote ID-OOD separability. Optimizing these factors produces cumulative gains, boosting both OOD detection performance and classification accuracy. Our framework outperforms existing methods across diverse benchmarks, particularly in long-tailed scenarios, providing a robust baseline for real-world OOD detection.
Abstract:In out-of-distribution (OOD) detection, fine-tuning with auxiliary outlier data often improves detection performance at the cost of classification accuracy. This trade-off stems from the loss of the original in-distribution (ID) distribution during fine-tuning. To establish a more practical and effective paradigm, we optimize three critical factors: model reminder, data sampling, and representation learning. We propose: (1) Self-Knowledge Distillation (SKD) to mitigate accuracy reduction; (2) Semi-hard Outlier Sampling (SOS) to improve detection efficiency with minimal data; and (3) Outlier-aware Supervised Contrastive Learning (OSCL) to promote ID-OOD separability. Optimizing these factors produces cumulative gains, boosting both OOD detection performance and classification accuracy. Our framework outperforms existing methods across diverse benchmarks, particularly in long-tailed scenarios, providing a robust baseline for real-world OOD detection.
Accepted at ICPR 2026. Code: this https URL
Machine Learning (cs.LG); Artificial Intelligence (cs.AI); Computer Vision and Pattern Recognition (cs.CV)
arXiv:2308.01030 [cs.LG]
(or arXiv:2308.01030v2 [cs.LG] for this version)
https://doi.org/10.48550/arXiv.2308.01030 Focus to learn more arXiv-issued DOI via DataCite
ICPR 2026, LNCS 16825, pp. 429-446, Springer, 2026
https://doi.org/10.1007/978-3-032-31930-2_29 Focus to learn more DOI(s) linking to related resources
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