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As machine learning becomes increasingly prevalent in impactful decisions, recognizing when inference data is outside the model's expected input distribution is paramount for giving context to predictions. Out-of-distribution (OOD)…

机器学习 · 计算机科学 2024-01-19 Anish Lakkapragada , Amol Khanna , Edward Raff , Nathan Inkawhich

Out-of-distribution (OOD) detection is essential for determining when a supervised model encounters inputs that differ meaningfully from its training distribution. While widely studied in classification, OOD detection for regression and…

机器学习 · 统计学 2025-12-16 Min Lu , Hemant Ishwaran

We consider the problem of detecting OoD(Out-of-Distribution) input data when using deep neural networks, and we propose a simple yet effective way to improve the robustness of several popular OoD detection methods against label shift. Our…

A crucial requirement for machine learning algorithms is not only to perform well, but also to show robustness and adaptability when encountering novel scenarios. One way to achieve these characteristics is to endow the deep learning models…

计算机视觉与模式识别 · 计算机科学 2025-02-26 Eduardo Aguilar , Bogdan Raducanu , Petia Radeva

Deep neural networks suffer from the overconfidence issue in the open world, meaning that classifiers could yield confident, incorrect predictions for out-of-distribution (OOD) samples. Thus, it is an urgent and challenging task to detect…

计算机视觉与模式识别 · 计算机科学 2022-04-12 Qiuyu Zhu , Guohui Zheng , Yingying Yan

Machine learning methods must be trusted to make appropriate decisions in real-world environments, even when faced with out-of-distribution (OOD) samples. Many current approaches simply aim to detect OOD examples and alert the user when an…

机器学习 · 计算机科学 2022-09-13 Randolph Linderman , Jingyang Zhang , Nathan Inkawhich , Hai Li , Yiran Chen

Out-of-distribution (OOD) detection remains challenging for deep learning models, particularly when test-time OOD samples differ significantly from training outliers. We propose OODD, a novel test-time OOD detection method that dynamically…

计算机视觉与模式识别 · 计算机科学 2025-03-14 Yifeng Yang , Lin Zhu , Zewen Sun , Hengyu Liu , Qinying Gu , Nanyang Ye

Out-of-distribution (OOD) detection aims to identify OOD inputs from unknown classes, which is important for the reliable deployment of machine learning models in the open world. Various scoring functions are proposed to distinguish it from…

机器学习 · 计算机科学 2024-10-29 Boxuan Zhang , Jianing Zhu , Zengmao Wang , Tongliang Liu , Bo Du , Bo Han

In open-set semi-supervised learning (OSSL), we consider unlabeled datasets that may contain unknown classes. Existing OSSL methods often use the softmax confidence for classifying data as in-distribution (ID) or out-of-distribution (OOD).…

机器学习 · 计算机科学 2026-01-26 Erik Wallin , Lennart Svensson , Fredrik Kahl , Lars Hammarstrand

Deep neural networks are susceptible to generating overconfident yet erroneous predictions when presented with data beyond known concepts. This challenge underscores the importance of detecting out-of-distribution (OOD) samples in the open…

计算机视觉与模式识别 · 计算机科学 2023-08-31 Yiye Chen , Yunzhi Lin , Ruinian Xu , Patricio A. Vela

Out-of-distribution (OOD) detection is essential for ensuring the reliability of deep learning models operating in open-world scenarios. Current OOD detectors mainly rely on statistical models to identify unusual patterns in the latent…

机器学习 · 计算机科学 2025-06-06 Konstantin Kirchheim , Frank Ortmeier

Detection of out-of-distribution (OOD) samples is crucial for safe real-world deployment of machine learning models. Recent advances in vision language foundation models have made them capable of detecting OOD samples without requiring…

计算机视觉与模式识别 · 计算机科学 2024-11-12 Hao Fu , Naman Patel , Prashanth Krishnamurthy , Farshad Khorrami

Robustness to out-of-distribution (OOD) data is an important goal in building reliable machine learning systems. Especially in autonomous systems, wrong predictions for OOD inputs can cause safety critical situations. As a first step…

机器学习 · 计算机科学 2020-04-17 Andreas Sedlmeier , Thomas Gabor , Thomy Phan , Lenz Belzner , Claudia Linnhoff-Popien

Building reliable classifiers is a fundamental challenge for deploying machine learning in real-world applications. A reliable system should not only detect out-of-distribution (OOD) inputs but also anticipate in-distribution (ID) errors by…

计算机视觉与模式识别 · 计算机科学 2026-03-05 Yang Li , Youyang Sha , Yinzhi Wang , Timothy Hospedales , Xi Shen , Shell Xu Hu , Xuanlong Yu

Deep neural networks are increasingly used in a wide range of technologies and services, but remain highly susceptible to out-of-distribution (OOD) samples, that is, drawn from a different distribution than the original training set. A…

机器学习 · 计算机科学 2024-04-17 Pietro Recalcati , Fabio Garcea , Luca Piano , Fabrizio Lamberti , Lia Morra

Out-of-distribution (OoD) inputs pose a persistent challenge to deep learning models, often triggering overconfident predictions on non-target objects. While prior work has primarily focused on refining scoring functions and adjusting…

计算机视觉与模式识别 · 计算机科学 2026-01-05 Changshun Wu , Weicheng He , Chih-Hong Cheng , Xiaowei Huang , Saddek Bensalem

An intuitive way to detect out-of-distribution (OOD) data is via the density function of a fitted probabilistic generative model: points with low density may be classed as OOD. But this approach has been found to fail, in deep learning…

机器学习 · 统计学 2022-11-02 Andi Zhang , Damon Wischik

Deep neural networks (DNNs), especially convolutional neural networks, have achieved superior performance on image classification tasks. However, such performance is only guaranteed if the input to a trained model is similar to the training…

计算机视觉与模式识别 · 计算机科学 2021-01-28 Liang Liang , Linhai Ma , Linchen Qian , Jiasong Chen

By design, discriminatively trained neural network classifiers produce reliable predictions only for in-distribution samples. For their real-world deployments, detecting out-of-distribution (OOD) samples is essential. Assuming OOD to be…

机器学习 · 计算机科学 2019-10-11 Sachin Vernekar , Ashish Gaurav , Vahdat Abdelzad , Taylor Denouden , Rick Salay , Krzysztof Czarnecki

Out-of-distribution (OOD) detection and uncertainty estimation (UE) are critical components for building safe machine learning systems, especially in real-world scenarios where unexpected inputs are inevitable. However the two problems…

机器学习 · 计算机科学 2025-12-01 Pirzada Suhail , Rehna Afroz , Gouranga Bala , Amit Sethi