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Out-of-distribution (OOD) detection is an indispensable aspect of secure AI when deploying machine learning models in real-world applications. Previous paradigms either explore better scoring functions or utilize the knowledge of outliers…

Machine Learning · Computer Science 2023-06-07 Jianing Zhu , Hengzhuang Li , Jiangchao Yao , Tongliang Liu , Jianliang Xu , Bo Han

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…

Machine Learning · Statistics 2025-12-16 Min Lu , Hemant Ishwaran

Out-of-distribution (OOD) detection is concerned with identifying data points that do not belong to the same distribution as the model's training data. For the safe deployment of predictive models in a real-world environment, it is critical…

Sound · Computer Science 2023-02-28 Zaharah Bukhsh , Aaqib Saeed

Modern neural networks are very powerful predictive models, but they are often incapable of recognizing when their predictions may be wrong. Closely related to this is the task of out-of-distribution detection, where a network must…

Machine Learning · Statistics 2018-02-15 Terrance DeVries , Graham W. Taylor

Out-of-distribution (OoD) detection is a natural downstream task for deep generative models, due to their ability to learn the input probability distribution. There are mainly two classes of approaches for OoD detection using deep…

Machine Learning · Computer Science 2019-07-11 Yujia Huang , Sihui Dai , Tan Nguyen , Richard G. Baraniuk , Anima Anandkumar

Out-of-Distribution (OOD) detection is an important problem in natural language processing (NLP). In this work, we propose a simple yet effective framework $k$Folden, which mimics the behaviors of OOD detection during training without the…

Computation and Language · Computer Science 2021-11-09 Xiaoya Li , Jiwei Li , Xiaofei Sun , Chun Fan , Tianwei Zhang , Fei Wu , Yuxian Meng , Jun Zhang

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…

Computer Vision and Pattern Recognition · Computer Science 2026-01-05 Changshun Wu , Weicheng He , Chih-Hong Cheng , Xiaowei Huang , Saddek Bensalem

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

The detection of out of distribution samples for image classification has been widely researched. Safety critical applications, such as autonomous driving, would benefit from the ability to localise the unusual objects causing the image to…

Computer Vision and Pattern Recognition · Computer Science 2019-11-11 Matt Angus , Krzysztof Czarnecki , Rick Salay

Existing prompt learning methods have shown certain capabilities in Out-of-Distribution (OOD) detection, but the lack of OOD images in the target dataset in their training can lead to mismatches between OOD images and In-Distribution (ID)…

Computer Vision and Pattern Recognition · Computer Science 2024-04-05 Tianqi Li , Guansong Pang , Xiao Bai , Wenjun Miao , Jin Zheng

This paper presents a principled approach for detecting out-of-distribution (OOD) samples in deep neural networks (DNN). Modeling probability distributions on deep features has recently emerged as an effective, yet computationally cheap…

Machine Learning · Computer Science 2020-12-09 Ibrahima Ndiour , Nilesh Ahuja , Omesh Tickoo

Most classification and segmentation datasets assume a closed-world scenario in which predictions are expressed as distribution over a predetermined set of visual classes. However, such assumption implies unavoidable and often unnoticeable…

Computer Vision and Pattern Recognition · Computer Science 2018-10-02 Petra Bevandić , Ivan Krešo , Marin Oršić , Siniša Šegvić

State-of-the-art Object Detection (OD) methods predominantly operate under a closed-world assumption, where test-time categories match those encountered during training. However, detecting and localizing unknown objects is crucial for…

Computer Vision and Pattern Recognition · Computer Science 2025-06-18 Daniel Montoya , Aymen Bouguerra , Alexandra Gomez-Villa , Fabio Arnez

Detecting out-of-distribution (OOD) data is a critical challenge in machine learning due to model overconfidence, often without awareness of their epistemological limits. We hypothesize that ``neural collapse'', a phenomenon affecting…

Machine Learning · Statistics 2024-02-28 Mouïn Ben Ammar , Nacim Belkhir , Sebastian Popescu , Antoine Manzanera , Gianni Franchi

Deep neural networks (DNNs) often exhibit overconfidence when encountering out-of-distribution (OOD) samples, posing significant challenges for deployment. Since DNNs are trained on in-distribution (ID) datasets, the information flow of ID…

Computer Vision and Pattern Recognition · Computer Science 2025-04-07 Guide Yang , Chao Hou , Weilong Peng , Xiang Fang , Yongwei Nie , Peican Zhu , Keke Tang

We focus on the challenge of out-of-distribution (OOD) detection in deep learning models, a crucial aspect in ensuring reliability. Despite considerable effort, the problem remains significantly challenging in deep learning models due to…

Computer Vision and Pattern Recognition · Computer Science 2023-05-30 Yunhao Ge , Jie Ren , Jiaping Zhao , Kaifeng Chen , Andrew Gallagher , Laurent Itti , Balaji Lakshminarayanan

The increased success of Deep Learning (DL) has recently sparked large-scale deployment of DL models in many diverse industry segments. Yet, a crucial weakness of supervised model is the inherent difficulty in handling out-of-distribution…

Machine Learning · Computer Science 2021-07-15 Lixuan Yang , Dario Rossi

The problem of out-of-distribution detection for graph classification is far from being solved. The existing models tend to be overconfident about OOD examples or completely ignore the detection task. In this work, we consider this problem…

Machine Learning · Computer Science 2022-06-23 Gleb Bazhenov , Sergei Ivanov , Maxim Panov , Alexey Zaytsev , Evgeny Burnaev

Various approaches have been proposed for out-of-distribution (OOD) detection by augmenting models, input examples, training sets, and optimization objectives. Deviating from existing work, we have a simple hypothesis that standard…

Machine Learning · Computer Science 2022-03-29 Xin Dong , Junfeng Guo , Ang Li , Wei-Te Ting , Cong Liu , H. T. Kung

Recent advances in deep learning have led to breakthroughs in the development of automated skin disease classification. As we observe an increasing interest in these models in the dermatology space, it is crucial to address aspects such as…

Computer Vision and Pattern Recognition · Computer Science 2021-06-03 Hannah Kim , Girmaw Abebe Tadesse , Celia Cintas , Skyler Speakman , Kush Varshney