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Recent large vision-language models such as CLIP have shown remarkable out-of-distribution (OOD) detection and generalization performance. However, their zero-shot in-distribution (ID) accuracy is often limited for downstream datasets.…

Computer Vision and Pattern Recognition · Computer Science 2024-07-30 Yifei Ming , Yixuan Li

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

Out-of-distribution (OOD) detection is crucial for ensuring reliable deployment of machine learning models. Recent advancements focus on utilizing easily accessible auxiliary outliers (e.g., data from the web or other datasets) in training.…

Machine Learning · Computer Science 2024-11-22 Haiyun Yao , Zongbo Han , Huazhu Fu , Xi Peng , Qinghua Hu , Changqing Zhang

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

Out of distribution (OOD) detection is a crucial part of making machine learning systems robust. The ImageNet-O dataset is an important tool in testing the robustness of ImageNet trained deep neural networks that are widely used across a…

Computer Vision and Pattern Recognition · Computer Science 2022-01-25 Anugya Srivastava , Shriya Jain , Mugdha Thigle

Out-of-distribution (OOD) detection is important for deploying machine learning models in the real world, where test data from shifted distributions can naturally arise. While a plethora of algorithmic approaches have recently emerged for…

Machine Learning · Computer Science 2021-12-03 Peyman Morteza , Yixuan Li

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

Out-of-distribution (OOD) detection is a critical task for safe deployment of learning systems in the open world setting. In this work, we investigate the use of feature density estimation via normalizing flows for OOD detection and present…

Computer Vision and Pattern Recognition · Computer Science 2024-05-01 Evan D. Cook , Marc-Antoine Lavoie , Steven L. Waslander

Detecting out-of-distribution (OOD) data at inference time is crucial for many applications of machine learning. We present XOOD: a novel extreme value-based OOD detection framework for image classification that consists of two algorithms.…

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

Deep learning-based approaches have produced models with good insect classification accuracy; Most of these models are conducive for application in controlled environmental conditions. One of the primary emphasis of researchers is to…

Computer Vision and Pattern Recognition · Computer Science 2023-05-04 Mojdeh Saadati , Aditya Balu , Shivani Chiranjeevi , Talukder Zaki Jubery , Asheesh K Singh , Soumik Sarkar , Arti Singh , Baskar Ganapathysubramanian

Modern machine learning models, that excel on computer vision tasks such as classification and object detection, are often overconfident in their predictions for Out-of-Distribution (OOD) examples, resulting in unpredictable behaviour for…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Brian K. S. Isaac-Medina , Mauricio Che , Yona F. A. Gaus , Samet Akcay , Toby P. Breckon

The crux of effective out-of-distribution (OOD) detection lies in acquiring a robust in-distribution (ID) representation, distinct from OOD samples. While previous methods predominantly leaned on recognition-based techniques for this…

Computer Vision and Pattern Recognition · Computer Science 2024-01-08 Jingyao Li , Pengguang Chen , Shaozuo Yu , Shu Liu , Jiaya Jia

A crucial requirement for machine learning algorithms is not only to perform well, but also to show robustness and adaptability when encountering novel scenarios. One way to achieve these characteristics is to endow the deep learning models…

Computer Vision and Pattern Recognition · Computer Science 2025-02-26 Eduardo Aguilar , Bogdan Raducanu , Petia Radeva

Out-of-distribution (OOD) detection seeks to identify samples from unknown classes, a critical capability for deploying machine learning models in open-world scenarios. Recent research has demonstrated that Vision-Language Models (VLMs) can…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Zhikang Xu , Qianqian Xu , Zitai Wang , Cong Hua , Sicong Li , Zhiyong Yang , Qingming Huang

Detecting out-of-distribution (OOD) data is a fundamental challenge in the deployment of machine learning models. From a security standpoint, this is particularly important because OOD test data can result in misleadingly confident yet…

Machine Learning · Computer Science 2025-02-25 Onat Gungor , Amanda Sofie Rios , Nilesh Ahuja , Tajana Rosing

Out-of-distribution (OOD) detection is an important task in machine learning systems for ensuring their reliability and safety. Deep probabilistic generative models facilitate OOD detection by estimating the likelihood of a data sample.…

Machine Learning · Computer Science 2021-06-16 Jaemoo Choi , Changyeon Yoon , Jeongwoo Bae , Myungjoo Kang

The superior performance of object detectors is often established under the condition that the test samples are in the same distribution as the training data. However, in many practical applications, out-of-distribution (OOD) instances are…

Computer Vision and Pattern Recognition · Computer Science 2023-10-31 Tianhao Zhang , Shenglin Wang , Nidhal Bouaynaya , Radu Calinescu , Lyudmila Mihaylova

Detecting out-of-distribution (OOD) inputs is a central challenge for safely deploying machine learning models in the real world. Existing solutions are mainly driven by small datasets, with low resolution and very few class labels (e.g.,…

Computer Vision and Pattern Recognition · Computer Science 2021-05-06 Rui Huang , Yixuan Li

Out-of-distribution (OOD) detection is essential for building reliable AI systems, as models that produce outputs for invalid inputs cannot be trusted. Although deep learning (DL) is often assumed to outperform traditional machine learning…

Computer Vision and Pattern Recognition · Computer Science 2026-05-21 Jihyeon Baek , Seunghoon Lee , Gitaek Kwon , Doohyun Park