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Out-of-distribution (OOD) detection is essential for ensuring the robustness of machine learning models by identifying samples that deviate from the training distribution. While traditional OOD detection has primarily focused on…

Computer Vision and Pattern Recognition · Computer Science 2024-11-14 Shawn Li , Huixian Gong , Hao Dong , Tiankai Yang , Zhengzhong Tu , Yue Zhao

A recent popular approach to out-of-distribution (OOD) detection is based on a self-supervised learning technique referred to as contrastive learning. There are two main variants of contrastive learning, namely instance and class…

Machine Learning · Computer Science 2022-11-08 Nawid Keshtmand , Raul Santos-Rodriguez , Jonathan Lawry

State-of-the-art models can perform well in controlled environments, but they often struggle when presented with out-of-distribution (OOD) examples, making OOD detection a critical component of NLP systems. In this paper, we focus on…

Computation and Language · Computer Science 2023-07-17 Mateusz Baran , Joanna Baran , Mateusz Wójcik , Maciej Zięba , Adam Gonczarek

Accessing machine learning models through remote APIs has been gaining prevalence following the recent trend of scaling up model parameters for increased performance. Even though these models exhibit remarkable ability, detecting…

Machine Learning · Computer Science 2024-08-20 Heeyoung Lee , Hoyoon Byun , Changdae Oh , JinYeong Bak , Kyungwoo Song

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

Out-of-distribution (OOD) detection is crucial for deploying robust machine learning models, especially in areas where security is critical. However, traditional OOD detection methods often fail to capture complex data distributions from…

Computer Vision and Pattern Recognition · Computer Science 2024-08-22 Armando Zhu , Jiabei Liu , Keqin Li , Shuying Dai , Bo Hong , Peng Zhao , Changsong Wei

One critical challenge in deploying highly performant machine learning models in real-life applications is out of distribution (OOD) detection. Given a predictive model which is accurate on in distribution (ID) data, an OOD detection system…

Machine Learning · Computer Science 2022-05-24 Conor Igoe , Youngseog Chung , Ian Char , Jeff Schneider

Adoption of deep learning in safety-critical systems raise the need for understanding what deep neural networks do not understand after models have been deployed. The behaviour of deep neural networks is undefined for so called…

Machine Learning · Computer Science 2021-08-25 Rickard Sjögren , Johan Trygg

Out-of-distribution (OOD) detection aims to detect "unknown" data whose labels have not been seen during the in-distribution (ID) training process. Recent progress in representation learning gives rise to distance-based OOD detection that…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Ji Zhang , Lianli Gao , Bingguang Hao , Hao Huang , Jingkuan Song , Hengtao Shen

Standard recognition approaches are unable to deal with novel categories at test time. Their overconfidence on the known classes makes the predictions unreliable for safety-critical applications such as healthcare or autonomous driving.…

Computer Vision and Pattern Recognition · Computer Science 2023-07-13 Lorenzo Li Lu , Giulia D'Ascenzi , Francesco Cappio Borlino , Tatiana Tommasi

Deep neural networks (DNNs) deployed in real-world applications can encounter out-of-distribution (OOD) data and adversarial examples. These represent distinct forms of distributional shifts that can significantly impact DNNs' reliability…

Machine Learning · Computer Science 2024-04-09 Naveen Karunanayake , Ravin Gunawardena , Suranga Seneviratne , Sanjay Chawla

Deep neural network, despite its remarkable capability of discriminating targeted in-distribution samples, shows poor performance on detecting anomalous out-of-distribution data. To address this defect, state-of-the-art solutions choose to…

Computer Vision and Pattern Recognition · Computer Science 2022-08-30 Boxi Wu , Jie Jiang , Haidong Ren , Zifan Du , Wenxiao Wang , Zhifeng Li , Deng Cai , Xiaofei He , Binbin Lin , Wei Liu

Reinforcement Learning (RL) based solutions are being adopted in a variety of domains including robotics, health care and industrial automation. Most focus is given to when these solutions work well, but they fail when presented with out of…

Machine Learning · Computer Science 2021-12-07 Aaqib Parvez Mohammed , Matias Valdenegro-Toro

Machine Learning classifiers used in Brain-Computer Interfaces make classifications based on the distribution of data they were trained on. When they need to make inferences on samples that fall outside of this distribution, they can only…

Machine Learning · Computer Science 2026-03-17 Merlijn Quincent Mulder , Matias Valdenegro-Toro , Andreea Ioana Sburlea , Ivo Pascal de Jong

Out-of-distribution (OOD) detection in deep learning has traditionally been framed as a binary task, where samples are either classified as belonging to the known classes or marked as OOD, with little attention given to the semantic…

Machine Learning · Computer Science 2025-03-28 Erik Wallin , Fredrik Kahl , Lars Hammarstrand

With the recently rapid development in deep learning, deep neural networks have been widely adopted in many real-life applications. However, deep neural networks are also known to have very little control over its uncertainty for unseen…

Machine Learning · Computer Science 2019-04-23 Wenhu Chen , Yilin Shen , Hongxia Jin , William Wang

Modern neural networks are known to give overconfident prediction for out-of-distribution inputs when deployed in the open world. It is common practice to leverage a surrogate outlier dataset to regularize the model during training, and…

Machine Learning · Computer Science 2024-02-27 Wenyu Jiang , Hao Cheng , Mingcai Chen , Chongjun Wang , Hongxin Wei

Recent object detectors have achieved impressive accuracy in identifying objects seen during training. However, real-world deployment often introduces novel and unexpected objects, referred to as out-of-distribution (OOD) objects, posing…

Machine Learning · Computer Science 2025-11-20 Quang-Huy Nguyen , Jin Peng Zhou , Zhenzhen Liu , Khanh-Huyen Bui , Kilian Q. Weinberger , Wei-Lun Chao , Dung D. Le

The discrepancy between in-distribution (ID) and out-of-distribution (OOD) samples can lead to \textit{distributional vulnerability} in deep neural networks, which can subsequently lead to high-confidence predictions for OOD samples. This…

Machine Learning · Computer Science 2023-10-03 Zhilin Zhao , Longbing Cao , Kun-Yu Lin

Prior work typically describes out-of-domain (OOD) or out-of-distribution (OODist) samples as those that originate from dataset(s) or source(s) different from the training set but for the same task. When compared to in-domain (ID) samples,…

Computation and Language · Computer Science 2023-06-05 Rhitabrat Pokharel , Ameeta Agrawal