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Machine learning algorithms often encounter different or "out-of-distribution" (OOD) data at deployment time, and OOD detection is frequently employed to detect these examples. While it works reasonably well in practice, existing…

Machine Learning · Computer Science 2025-01-16 Konstantin Garov , Kamalika Chaudhuri

Out-of-distribution (OOD) detection is an important topic for real-world machine learning systems, but settings with limited in-distribution samples have been underexplored. Such few-shot OOD settings are challenging, as models have scarce…

Machine Learning · Computer Science 2023-12-27 Nikhil Mehta , Kevin J Liang , Jing Huang , Fu-Jen Chu , Li Yin , Tal Hassner

Multimodal fusion, leveraging data like vision and language, is rapidly gaining traction. This enriched data representation improves performance across various tasks. Existing methods for out-of-distribution (OOD) detection, a critical area…

Computer Vision and Pattern Recognition · Computer Science 2024-08-29 Jinglun Li , Xinyu Zhou , Kaixun Jiang , Lingyi Hong , Pinxue Guo , Zhaoyu Chen , Weifeng Ge , Wenqiang Zhang

As language models become more general purpose, increased attention needs to be paid to detecting out-of-distribution (OOD) instances, i.e., those not belonging to any of the distributions seen during training. Existing methods for…

Machine Learning · Computer Science 2024-07-19 Aryan Gulati , Xingjian Dong , Carlos Hurtado , Sarath Shekkizhar , Swabha Swayamdipta , Antonio Ortega

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 critical to ensuring the reliability and safety of machine learning systems. For instance, in autonomous driving, we would like the driving system to issue an alert and hand over the control to humans…

Computer Vision and Pattern Recognition · Computer Science 2024-01-24 Jingkang Yang , Kaiyang Zhou , Yixuan Li , Ziwei Liu

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

Out-of-distribution (OOD) detection is essential for model trustworthiness which aims to sensitively identify semantic OOD samples and robustly generalize for covariate-shifted OOD samples. However, we discover that the superior OOD…

Machine Learning · Computer Science 2024-10-16 Qingyang Zhang , Qiuxuan Feng , Joey Tianyi Zhou , Yatao Bian , Qinghua Hu , Changqing Zhang

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 critical to ensure the safe deployment of deep learning models in critical applications. Deep learning models can often misidentify OOD samples as in-distribution (ID) samples. This vulnerability…

Computer Vision and Pattern Recognition · Computer Science 2025-11-14 Sudarshan Regmi

Out-of-distribution (OOD) detection is important for machine learning models deployed in the wild. Recent methods use auxiliary outlier data to regularize the model for improved OOD detection. However, these approaches make a strong…

Machine Learning · Computer Science 2022-06-30 Julian Katz-Samuels , Julia Nakhleh , Robert Nowak , Yixuan Li

Detection of out-of-distribution (OOD) samples is crucial for safe real-world deployment of machine learning models. Recent advances in vision language foundation models have made them capable of detecting OOD samples without requiring…

Computer Vision and Pattern Recognition · Computer Science 2024-11-12 Hao Fu , Naman Patel , Prashanth Krishnamurthy , Farshad Khorrami

Out-of-distribution (OOD) detection is critical for identifying test samples that deviate from in-distribution (ID) data, ensuring network robustness and reliability. This paper presents a flexible framework for OOD knowledge distillation…

Machine Learning · Computer Science 2025-06-30 Zhilin Zhao , Longbing Cao , Yixuan Zhang , Kun-Yu Lin , Wei-Shi Zheng

We present a principled approach for detecting out-of-distribution (OOD) and adversarial samples in deep neural networks. Our approach consists in modeling the outputs of the various layers (deep features) with parametric probability…

Machine Learning · Statistics 2019-09-27 Nilesh A. Ahuja , Ibrahima Ndiour , Trushant Kalyanpur , Omesh Tickoo

Out-of-distribution (OOD) detection discerns OOD data where the predictor cannot make valid predictions as in-distribution (ID) data, thereby increasing the reliability of open-world classification. However, it is typically hard to collect…

Machine Learning · Computer Science 2023-12-06 Haotian Zheng , Qizhou Wang , Zhen Fang , Xiaobo Xia , Feng Liu , Tongliang Liu , Bo Han

In this work, we propose CODE, an extension of existing work from the field of explainable AI that identifies class-specific recurring patterns to build a robust Out-of-Distribution (OoD) detection method for visual classifiers. CODE does…

Computer Vision and Pattern Recognition · Computer Science 2023-11-23 Romain Xu-Darme , Julien Girard-Satabin , Darryl Hond , Gabriele Incorvaia , Zakaria Chihani

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

Pre-trained vision-language models have exhibited remarkable abilities in detecting out-of-distribution (OOD) samples. However, some challenging OOD samples, which lie close to in-distribution (InD) data in image feature space, can still…

Computer Vision and Pattern Recognition · Computer Science 2025-08-22 Jinglun Li , Kaixun Jiang , Zhaoyu Chen , Bo Lin , Yao Tang , Weifeng Ge , Wenqiang Zhang

We present a comprehensive experimental study on pretrained feature extractors for visual out-of-distribution (OOD) detection, focusing on adapting contrastive language-image pretrained (CLIP) models. Without fine-tuning on the training…

Computer Vision and Pattern Recognition · Computer Science 2023-11-10 Nikolas Adaloglou , Felix Michels , Tim Kaiser , Markus Kollmann

Methods for out-of-distribution (OOD) detection that scale to 3D data are crucial components of any real-world clinical deep learning system. Classic denoising diffusion probabilistic models (DDPMs) have been recently proposed as a robust…

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