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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

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

Neural networks are known to produce over-confident predictions on input images, even when these images are out-of-distribution (OOD) samples. This limits the applications of neural network models in real-world scenarios, where OOD samples…

Computer Vision and Pattern Recognition · Computer Science 2022-07-19 Ke Fan , Yikai Wang , Qian Yu , Da Li , Yanwei Fu

Out-of-distribution (OOD) detection has emerged as a popular technique to enhance the reliability of machine learning models by identifying unexpected inputs from unknown classes. Recent progress in pre-trained vision-language models (VLMs)…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Yuanwei Hu , Bo Peng , Yadan Luo , Zhen Fang , Ling Chen , Jie Lu

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…

Computer Vision and Pattern Recognition · Computer Science 2021-01-28 Liang Liang , Linhai Ma , Linchen Qian , Jiasong Chen

The ability to detect unfamiliar or unexpected images is essential for safe deployment of computer vision systems. In the context of classification, the task of detecting images outside of a model's training domain is known as…

Computer Vision and Pattern Recognition · Computer Science 2024-04-03 Galadrielle Humblot-Renaux , Sergio Escalera , Thomas B. Moeslund

Out-Of-Distribution (OOD) detection has received broad attention over the years, aiming to ensure the reliability and safety of deep neural networks (DNNs) in real-world scenarios by rejecting incorrect predictions. However, we notice a…

Computer Vision and Pattern Recognition · Computer Science 2022-12-01 Yao Zhu , Yuefeng Chen , Xiaodan Li , Rong Zhang , Hui Xue , Xiang Tian , Rongxin Jiang , Bolun Zheng , Yaowu Chen

Deep neural networks (DNNs) perform well at classifying inputs associated with the classes they have been trained on, which are known as in distribution inputs. However, out-of-distribution (OOD) inputs pose a great challenge to DNNs and…

Machine Learning · Computer Science 2021-02-24 Guy Amit , Moshe Levy , Ishai Rosenberg , Asaf Shabtai , Yuval Elovici

Open-world classification systems should discern out-of-distribution (OOD) data whose labels deviate from those of in-distribution (ID) cases, motivating recent studies in OOD detection. Advanced works, despite their promising progress, may…

Machine Learning · Computer Science 2023-12-27 Qizhou Wang , Zhen Fang , Yonggang Zhang , Feng Liu , Yixuan Li , Bo Han

Despite their success, Machine Learning (ML) models do not generalize effectively to data not originating from the training distribution. To reliably employ ML models in real-world healthcare systems and avoid inaccurate predictions on…

Machine Learning · Computer Science 2023-09-29 Mohammad Azizmalayeri , Ameen Abu-Hanna , Giovanni Ciná

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

Training robust deep learning models is crucial in Earth Observation, where globally deployed models often face distribution shifts that degrade performance, especially in low-data regions. Out-of-distribution (OOD) detection addresses this…

Computer Vision and Pattern Recognition · Computer Science 2025-04-10 Burak Ekim , Girmaw Abebe Tadesse , Caleb Robinson , Gilles Hacheme , Michael Schmitt , Rahul Dodhia , Juan M. Lavista Ferres

Out-of-distribution (OOD) detection is essential for deploying machine learning models in open-world and safety-critical scenarios, where test inputs may deviate from the training distribution and overconfident predictions on unknown…

Machine Learning · Computer Science 2026-05-28 Fengqiang Wan , Qing-Yuan Jiang , Yang Yang

Machine learning (ML) has become increasingly popular in network intrusion detection. However, ML-based solutions always respond regardless of whether the input data reflects known patterns, a common issue across safety-critical…

Machine Learning · Computer Science 2023-08-29 Andrea Corsini , Shanchieh Jay Yang

Machine learning models, while progressively advanced, rely heavily on the IID assumption, which is often unfulfilled in practice due to inevitable distribution shifts. This renders them susceptible and untrustworthy for deployment in…

Machine Learning · Computer Science 2024-03-05 Han Yu , Jiashuo Liu , Xingxuan Zhang , Jiayun Wu , Peng Cui

The training and test data for deep-neural-network-based classifiers are usually assumed to be sampled from the same distribution. When part of the test samples are drawn from a distribution that is sufficiently far away from that of the…

Machine Learning · Computer Science 2021-12-14 Yinan Wang , Wenbo Sun , Jionghua "Judy" Jin , Zhenyu "James" Kong , Xiaowei Yue

Density-based Out-of-distribution (OOD) detection has recently been shown unreliable for the task of detecting OOD images. Various density ratio based approaches achieve good empirical performance, however methods typically lack a…

Machine Learning · Statistics 2022-06-09 Mingtian Zhang , Andi Zhang , Tim Z. Xiao , Yitong Sun , Steven McDonagh

Detecting out-of-distribution (OOD) data has become a critical component in ensuring the safe deployment of machine learning models in the real world. Existing OOD detection approaches primarily rely on the output or feature space for…

Machine Learning · Computer Science 2021-10-12 Rui Huang , Andrew Geng , Yixuan Li

Deep learning methods have boosted the adoption of NLP systems in real-life applications. However, they turn out to be vulnerable to distribution shifts over time which may cause severe dysfunctions in production systems, urging…

Computation and Language · Computer Science 2022-11-28 Pierre Colombo , Eduardo D. C. Gomes , Guillaume Staerman , Nathan Noiry , Pablo Piantanida

When deploying a trained machine learning model in the real world, it is inevitable to receive inputs from out-of-distribution (OOD) sources. For instance, in continual learning settings, it is common to encounter OOD samples due to the…

Machine Learning · Computer Science 2024-01-23 Chuanwen Feng , Wenlong Chen , Ao Ke , Yilong Ren , Xike Xie , S. Kevin Zhou