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In the dynamic realms of machine learning and deep learning, the robustness and reliability of models are paramount, especially in critical real-world applications. A fundamental challenge in this sphere is managing Out-of-Distribution…

Machine Learning · Computer Science 2024-03-07 Yingrui Ji , Yao Zhu , Zhigang Li , Jiansheng Chen , Yunlong Kong , Jingbo Chen

Methods which utilize the outputs or feature representations of predictive models have emerged as promising approaches for out-of-distribution (OOD) detection of image inputs. However, these methods struggle to detect OOD inputs that share…

Machine Learning · Computer Science 2023-02-09 Lily H. Zhang , Rajesh Ranganath

In medical imaging, unsupervised out-of-distribution (OOD) detection offers an attractive approach for identifying pathological cases with extremely low incidence rates. In contrast to supervised methods, OOD-based approaches function…

Computer Vision and Pattern Recognition · Computer Science 2025-08-01 Lemar Abdi , Francisco Caetano , Amaan Valiuddin , Christiaan Viviers , Hamdi Joudeh , Fons van der Sommen

Out-of-distribution (OOD) detection is crucial for the deployment of machine learning models in the open world. While existing OOD detectors are effective in identifying OOD samples that deviate significantly from in-distribution (ID) data,…

Machine Learning · Computer Science 2024-12-10 Hao Fu , Prashanth Krishnamurthy , Siddharth Garg , Farshad Khorrami

Out-of-distribution (OOD) detection is critical for the safe deployment of machine learning systems in safety-sensitive domains. Diffusion models have recently emerged as powerful generative models, capable of capturing complex data…

Computer Vision and Pattern Recognition · Computer Science 2025-10-09 Shirin Shoushtari , Yi Wang , Xiao Shi , M. Salman Asif , Ulugbek S. Kamilov

Out-of-Distribution(OOD) detection, a fundamental machine learning task aimed at identifying abnormal samples, traditionally requires model retraining for different inlier distributions. While recent research demonstrates the applicability…

Machine Learning · Computer Science 2025-02-25 Hongzhe Cheng , Tianyou Zheng , Tianyi Zhang , Matthew Johnson-Roberson , Weiming Zhi

Out-of-distribution (OOD) detection is crucial for ensuring the reliability of deep learning models in real-world applications. Existing methods typically focus on feature representations or output-space analysis, often assuming a…

Computer Vision and Pattern Recognition · Computer Science 2025-09-18 Mostafa ElAraby , Sabyasachi Sahoo , Yann Pequignot , Paul Novello , Liam Paull

As the use of machine learning continues to expand, the importance of ensuring its safety cannot be overstated. A key concern in this regard is the ability to identify whether a given sample is from the training distribution, or is an…

Machine Learning · Computer Science 2023-08-11 Nicola Franco , Daniel Korth , Jeanette Miriam Lorenz , Karsten Roscher , Stephan Guennemann

Detecting out-of-distribution (OOD) inputs is a principal task for ensuring the safety of deploying deep-neural-network classifiers in open-set scenarios. OOD samples can be drawn from arbitrary distributions and exhibit deviations from…

Computer Vision and Pattern Recognition · Computer Science 2024-09-11 Choubo Ding , Guansong Pang

A serious problem in image classification is that a trained model might perform well for input data that originates from the same distribution as the data available for model training, but performs much worse for out-of-distribution (OOD)…

Computer Vision and Pattern Recognition · Computer Science 2021-12-07 Rajat Koner , Poulami Sinhamahapatra , Karsten Roscher , Stephan Günnemann , Volker Tresp

Out-of-distribution (OOD) detection identifies test samples that fall outside a model's training distribution, a capability critical for safe deployment in high-stakes applications. Standard OOD detectors are trained on a specific…

Artificial Intelligence · Computer Science 2026-05-14 Shawn Li , You Qin , Jiate Li , Charith Peris , Lisa Bauer , Roger Zimmermann , Yue Zhao

We study the problem of Out-of-Distribution (OOD) detection, that is, detecting whether a learning algorithm's output can be trusted at inference time. While a number of tests for OOD detection have been proposed in prior work, a formal…

Machine Learning · Statistics 2023-09-19 Akshayaa Magesh , Venugopal V. Veeravalli , Anirban Roy , Susmit Jha

Out-of-distribution (OOD) detection is a critical task in machine learning that seeks to identify abnormal samples. Traditionally, unsupervised methods utilize a deep generative model for OOD detection. However, such approaches require a…

Machine Learning · Computer Science 2024-10-25 Alvin Heng , Alexandre H. Thiery , Harold Soh

Recent works demonstrate the effectiveness of diffusion models as unsupervised solvers for inverse imaging problems. Sparse-view computed tomography (CT) has greatly benefited from these advancements, achieving improved generalization…

Image and Video Processing · Electrical Eng. & Systems 2025-05-28 Ezgi Demircan-Tureyen , Felix Lucka , Tristan van Leeuwen

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…

Computer Vision and Pattern Recognition · Computer Science 2025-02-26 Eduardo Aguilar , Bogdan Raducanu , Petia Radeva

It is crucial to detect when an instance lies downright too far from the training samples for the machine learning model to be trusted, a challenge known as out-of-distribution (OOD) detection. For neural networks, one approach to this task…

As deep learning methods form a critical part in commercially important applications such as autonomous driving and medical diagnostics, it is important to reliably detect out-of-distribution (OOD) inputs while employing these algorithms.…

Machine Learning · Computer Science 2018-09-12 Apoorv Vyas , Nataraj Jammalamadaka , Xia Zhu , Dipankar Das , Bharat Kaul , Theodore L. Willke

Out-of-distribution (OOD) detection is essential for model trustworthiness which aims to sensitively identify semantic OOD samples and robustly generalize for covariate-shifted OOD samples. However, we discover that the superior OOD…

Machine Learning · Computer Science 2024-10-16 Qingyang Zhang , Qiuxuan Feng , Joey Tianyi Zhou , Yatao Bian , Qinghua Hu , Changqing Zhang

Out-of-distribution (OOD) detection is an important task in machine learning systems for ensuring their reliability and safety. Deep probabilistic generative models facilitate OOD detection by estimating the likelihood of a data sample.…

Machine Learning · Computer Science 2021-06-16 Jaemoo Choi , Changyeon Yoon , Jeongwoo Bae , Myungjoo Kang

Out-of-distribution detection (OOD) deals with anomalous input to neural networks. In the past, specialized methods have been proposed to reject predictions on anomalous input. Similarly, it was shown that feature extraction models in…

Machine Learning · Computer Science 2022-01-25 Jan Diers , Christian Pigorsch