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One of the challenges for neural networks in real-life applications is the overconfident errors these models make when the data is not from the original training distribution. Addressing this issue is known as Out-of-Distribution (OOD)…

Computer Vision and Pattern Recognition · Computer Science 2024-07-24 Sina Sharifi , Taha Entesari , Bardia Safaei , Vishal M. Patel , Mahyar Fazlyab

Supervised classification methods often assume the train and test data distributions are the same and that all classes in the test set are present in the training set. However, deployed classifiers often require the ability to recognize…

Computer Vision and Pattern Recognition · Computer Science 2021-01-27 Ryne Roady , Tyler L. Hayes , Ronald Kemker , Ayesha Gonzales , Christopher Kanan

The core of out-of-distribution (OOD) detection is to learn the in-distribution (ID) representation, which is distinguishable from OOD samples. Previous work applied recognition-based methods to learn the ID features, which tend to learn…

Computer Vision and Pattern Recognition · Computer Science 2023-04-12 Jingyao Li , Pengguang Chen , Shaozuo Yu , Zexin He , Shu Liu , Jiaya Jia

The ability to detect Out-of-Distribution (OOD) data is important in safety-critical applications of deep learning. The aim is to separate In-Distribution (ID) data drawn from the training distribution from OOD data using a measure of…

Machine Learning · Computer Science 2022-09-21 Guoxuan Xia , Christos-Savvas Bouganis

Out-of-Distribution (OOD) detection is essential for the trustworthiness of AI systems. Methods using prior information (i.e., subspace-based methods) have shown effective performance by extracting information geometry to detect OOD data…

Computer Vision and Pattern Recognition · Computer Science 2025-06-25 Kaiyu Guo , Zijian Wang , Tan Pan , Brian C. Lovell , Mahsa Baktashmotlagh

This paper proposes a novel out-of-distribution (OOD) detection framework named MoodCat for image classifiers. MoodCat masks a random portion of the input image and uses a generative model to synthesize the masked image to a new image…

Computer Vision and Pattern Recognition · Computer Science 2022-08-02 Yijun Yang , Ruiyuan Gao , Qiang Xu

Research around Spiking Neural Networks has ignited during the last years due to their advantages when compared to traditional neural networks, including their efficient processing and inherent ability to model complex temporal dynamics.…

Neural and Evolutionary Computing · Computer Science 2022-10-04 Aitor Martinez Seras , Javier Del Ser , Jesus L. Lobo , Pablo Garcia-Bringas , Nikola Kasabov

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

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

Accurate and explainable out-of-distribution (OOD) detection is required to use machine learning systems safely. Previous work has shown that feature distance to decision boundaries can be used to identify OOD data effectively. In this…

Machine Learning · Computer Science 2025-08-15 Maria Stoica , Francesco Leofante , Alessio Lomuscio

Data outside the problem domain poses significant threats to the security of AI-based intelligent systems. Aiming to investigate the data domain and out-of-distribution (OOD) data in AI quality management (AIQM) study, this paper proposes…

Artificial Intelligence · Computer Science 2023-10-13 Tinghui Ouyang , Isao Echizen , Yoshiki Seo

Out-of-distribution (OOD) generalization remains a fundamental challenge in real-world classification, where test distributions often differ substantially from training data. Most existing approaches pursue domain-invariant representations,…

Machine Learning · Computer Science 2026-01-30 Chen Cheng , Ang Li

When presented with Out-of-Distribution (OOD) examples, deep neural networks yield confident, incorrect predictions. Detecting OOD examples is challenging, and the potential risks are high. In this paper, we propose to detect OOD examples…

Machine Learning · Computer Science 2020-01-10 Chandramouli Shama Sastry , Sageev Oore

Out-of-distribution detection is an important capability that has long eluded vanilla neural networks. Deep Neural networks (DNNs) tend to generate over-confident predictions when presented with inputs that are significantly…

Machine Learning · Computer Science 2022-02-24 Sumedh A Sontakke , Buvaneswari Ramanan , Laurent Itti , Thomas Woo

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

The usage of deep neural networks in safety-critical systems is limited by our ability to guarantee their correct behavior. Runtime monitors are components aiming to identify unsafe predictions and discard them before they can lead to…

Machine Learning · Computer Science 2023-01-16 Joris Guérin , Kevin Delmas , Raul Sena Ferreira , Jérémie Guiochet

By design, discriminatively trained neural network classifiers produce reliable predictions only for in-distribution samples. For their real-world deployments, detecting out-of-distribution (OOD) samples is essential. Assuming OOD to be…

Machine Learning · Computer Science 2019-10-11 Sachin Vernekar , Ashish Gaurav , Vahdat Abdelzad , Taylor Denouden , Rick Salay , Krzysztof Czarnecki

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

Out-of-distribution (OOD) detection is critical for ensuring the reliability of open-world intelligent systems. Despite the notable advancements in existing OOD detection methodologies, our study identifies a significant performance drop…

Computer Vision and Pattern Recognition · Computer Science 2024-02-01 Jiuqing Dong , Yongbin Gao , Heng Zhou , Jun Cen , Yifan Yao , Sook Yoon , Park Dong Sun

Detecting out-of-distribution examples is important for safety-critical machine learning applications such as detecting novel biological phenomena and self-driving cars. However, existing research mainly focuses on simple small-scale…

Computer Vision and Pattern Recognition · Computer Science 2022-05-17 Dan Hendrycks , Steven Basart , Mantas Mazeika , Andy Zou , Joe Kwon , Mohammadreza Mostajabi , Jacob Steinhardt , Dawn Song