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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…

Computer Vision and Pattern Recognition · Computer Science 2022-04-12 Qiuyu Zhu , Guohui Zheng , Yingying Yan

Detection of out-of-distribution (OoD) samples in the context of image classification has recently become an area of interest and active study, along with the topic of uncertainty estimation, to which it is closely related. In this paper we…

Computer Vision and Pattern Recognition · Computer Science 2022-08-31 Silvio Galesso , Maria Alejandra Bravo , Mehdi Naouar , Thomas Brox

Out-of-distribution (OOD) detection is a critical task to ensure the reliability and security of machine learning models deployed in real-world applications. Conventional methods for OOD detection that rely on single-modal information,…

Computer Vision and Pattern Recognition · Computer Science 2024-03-21 K Huang , G Song , Hanwen Su , Jiyan Wang

When deployed for risk-sensitive tasks, deep neural networks must be able to detect instances with labels from outside the distribution for which they were trained. In this paper we present a novel framework to benchmark the ability of…

Machine Learning · Computer Science 2023-02-24 Ido Galil , Mohammed Dabbah , Ran El-Yaniv

Out-of-distribution (OOD) detection lies at the heart of robust artificial intelligence (AI), aiming to identify samples from novel distributions beyond the training set. Recent approaches have exploited feature representations as…

Machine Learning · Computer Science 2025-08-06 Tarhib Al Azad , Faizul Rakib Sayem , Shahana Ibrahim

Deep neural networks have attained remarkable performance when applied to data that comes from the same distribution as that of the training set, but can significantly degrade otherwise. Therefore, detecting whether an example is…

Computer Vision and Pattern Recognition · Computer Science 2020-04-02 Yen-Chang Hsu , Yilin Shen , Hongxia Jin , Zsolt Kira

Detecting and rejecting unknown out-of-distribution (OOD) samples is critical for deployed neural networks to void unreliable predictions. In real-world scenarios, however, the efficacy of existing OOD detection methods is often impeded by…

Computer Vision and Pattern Recognition · Computer Science 2024-11-01 Kai Liu , Zhihang Fu , Sheng Jin , Chao Chen , Ze Chen , Rongxin Jiang , Fan Zhou , Yaowu Chen , Jieping Ye

Semantic segmentation models classify pixels into a set of known (``in-distribution'') visual classes. When deployed in an open world, the reliability of these models depends on their ability not only to classify in-distribution pixels but…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Yuyuan Liu , Choubo Ding , Yu Tian , Guansong Pang , Vasileios Belagiannis , Ian Reid , Gustavo Carneiro

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

Out-of-distribution (OOD) detection is crucial for deploying robust and reliable machine-learning systems in open-world settings. Despite steady advances in OOD detectors, their interplay with modern training pipelines that maximize…

Computer Vision and Pattern Recognition · Computer Science 2026-01-19 Gerhard Krumpl , Henning Avenhaus , Horst Possegger

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

Our work investigates out-of-distribution (OOD) detection as a neural network output explanation problem. We learn a heatmap representation for detecting OOD images while visualizing in- and out-of-distribution image regions at the same…

Computer Vision and Pattern Recognition · Computer Science 2023-08-14 Julia Hornauer , Vasileios Belagiannis

Out-of-distribution (OOD) detection is essential to prevent anomalous inputs from causing a model to fail during deployment. While improved OOD detection methods have emerged, they often rely on the final layer outputs and require a full…

Computer Vision and Pattern Recognition · Computer Science 2021-05-03 Ziqian Lin , Sreya Dutta Roy , Yixuan Li

Discriminatively trained neural classifiers can be trusted, only when the input data comes from the training distribution (in-distribution). Therefore, detecting out-of-distribution (OOD) samples is very important to avoid classification…

Machine Learning · Computer Science 2019-04-30 Sachin Vernekar , Ashish Gaurav , Taylor Denouden , Buu Phan , Vahdat Abdelzad , Rick Salay , Krzysztof Czarnecki

It is an important problem in trustworthy machine learning to recognize out-of-distribution (OOD) inputs which are inputs unrelated to the in-distribution task. Many out-of-distribution detection methods have been suggested in recent years.…

Machine Learning · Computer Science 2022-06-22 Julian Bitterwolf , Alexander Meinke , Maximilian Augustin , Matthias Hein

Out-of-distribution (OOD) detection is the problem of identifying inputs which are unrelated to the in-distribution task. The OOD detection performance when the in-distribution (ID) is ImageNet-1K is commonly being tested on a small range…

Machine Learning · Computer Science 2023-06-02 Julian Bitterwolf , Maximilian Müller , Matthias Hein

Out-of-distribution (OOD) detection is an important building block in trustworthy image recognition systems as unknown classes may arise at test-time. OOD detection methods typically revolve around a single classifier, leading to a split in…

Computer Vision and Pattern Recognition · Computer Science 2025-07-31 Galadrielle Humblot-Renaux , Gianni Franchi , Sergio Escalera , Thomas B. Moeslund

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 aims to detect test samples outside the training category space, which is an essential component in building reliable machine learning systems. Existing reviews on OOD detection primarily focus on method…

Machine Learning · Computer Science 2025-08-05 Shuo Lu , Yingsheng Wang , Lijun Sheng , Lingxiao He , Aihua Zheng , Jian Liang

Out-of-distribution (OOD) detection is a critical task for ensuring the reliability and safety of deep neural networks in real-world scenarios. Different from most previous OOD detection methods that focus on designing OOD scores or…

Computer Vision and Pattern Recognition · Computer Science 2022-10-11 Yao Zhu , YueFeng Chen , Chuanlong Xie , Xiaodan Li , Rong Zhang , Hui Xue , Xiang Tian , bolun zheng , Yaowu Chen