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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

Several areas have been improved with Deep Learning during the past years. Implementing Deep Neural Networks (DNN) for non-safety related applications have shown remarkable achievements over the past years; however, for using DNNs in safety…

Deep neural networks are susceptible to generating overconfident yet erroneous predictions when presented with data beyond known concepts. This challenge underscores the importance of detecting out-of-distribution (OOD) samples in the open…

Computer Vision and Pattern Recognition · Computer Science 2023-08-31 Yiye Chen , Yunzhi Lin , Ruinian Xu , Patricio A. Vela

Existing out-of-distribution (OOD) detection literature clearly defines semantic shift as a sign of OOD but does not have a consensus over covariate shift. Samples experiencing covariate shift but not semantic shift are either excluded from…

Computer Vision and Pattern Recognition · Computer Science 2022-04-12 Jingkang Yang , Kaiyang Zhou , Ziwei Liu

Out-of-distribution (OOD) detection is crucial for deploying robust machine learning models, especially in areas where security is critical. However, traditional OOD detection methods often fail to capture complex data distributions from…

Computer Vision and Pattern Recognition · Computer Science 2024-08-22 Armando Zhu , Jiabei Liu , Keqin Li , Shuying Dai , Bo Hong , Peng Zhao , Changsong Wei

Applying machine learning to increasingly high-dimensional problems with sparse or biased training data increases the risk that a model is used on inputs outside its training domain. For such out-of-distribution (OOD) inputs, the model can…

Machine Learning · Computer Science 2025-03-10 Juniper Tyree , Andreas Rupp , Petri S. Clusius , Michael H. Boy

State-of-the-art Object Detection (OD) methods predominantly operate under a closed-world assumption, where test-time categories match those encountered during training. However, detecting and localizing unknown objects is crucial for…

Computer Vision and Pattern Recognition · Computer Science 2025-06-18 Daniel Montoya , Aymen Bouguerra , Alexandra Gomez-Villa , Fabio Arnez

Out-of-Distribution (OOD) detection is a cornerstone for the safe deployment of AI systems in the open world. However, existing methods treat OOD detection as a binary classification problem, a cognitive flattening that fails to distinguish…

Machine Learning · Statistics 2025-10-16 Ningkang Peng , Yuzhe Mao , Yuhao Zhang , Linjin Qian , Qianfeng Yu , Yanhui Gu , Yi Chen , Li Kong

Effective Out-of-Distribution (OOD) detection is criti-cal for ensuring the reliability of semantic segmentation models, particularly in complex road environments where safety and accuracy are paramount. Despite recent advancements in large…

Computer Vision and Pattern Recognition · Computer Science 2025-08-21 Jeonghyo Song , Kimin Yun , DaeUng Jo , Jinyoung Kim , Youngjoon Yoo

We present a new methodology for detecting out-of-distribution (OOD) images by utilizing norms of the score estimates at multiple noise scales. A score is defined to be the gradient of the log density with respect to the input data. Our…

Machine Learning · Computer Science 2021-03-24 Ahsan Mahmood , Junier Oliva , Martin Styner

Computer-aided diagnostics has benefited from the development of deep learning-based computer vision techniques in these years. Traditional supervised deep learning methods assume that the test sample is drawn from the identical…

Computer Vision and Pattern Recognition · Computer Science 2024-07-04 Zesheng Hong , Yubiao Yue , Yubin Chen , Lele Cong , Huanjie Lin , Yuanmei Luo , Mini Han Wang , Weidong Wang , Jialong Xu , Xiaoqi Yang , Hechang Chen , Zhenzhang Li , Sihong Xie

A key feature of out-of-distribution (OOD) detection is to exploit a trained neural network by extracting statistical patterns and relationships through the multi-layer classifier to detect shifts in the expected input data distribution.…

Machine Learning · Computer Science 2023-06-07 Eduardo Dadalto , Pierre Colombo , Guillaume Staerman , Nathan Noiry , Pablo Piantanida

Detecting out-of-distribution (OOD) inputs during the inference stage is crucial for deploying neural networks in the real world. Previous methods commonly relied on the output of a network derived from the highly activated feature map. In…

Computer Vision and Pattern Recognition · Computer Science 2023-03-03 Yeonguk Yu , Sungho Shin , Seongju Lee , Changhyun Jun , Kyoobin Lee

Soft labeling becomes a common output regularization for generalization and model compression of deep neural networks. However, the effect of soft labeling on out-of-distribution (OOD) detection, which is an important topic of machine…

Machine Learning · Computer Science 2020-07-08 Doyup Lee , Yeongjae Cheon

Recent research underscores the pivotal role of the Out-of-Distribution (OOD) feature representation field scale in determining the efficacy of models in OOD detection. Consequently, the adoption of model ensembles has emerged as a…

Machine Learning · Computer Science 2024-08-19 Chenhui Xu , Fuxun Yu , Zirui Xu , Nathan Inkawhich , Xiang Chen

Out-of-distribution (OOD) detection has seen significant advancements with zero-shot approaches by leveraging the powerful Vision-Language Models (VLMs) such as CLIP. However, prior research works have predominantly focused on enhancing…

Computer Vision and Pattern Recognition · Computer Science 2025-01-10 Pei-Kang Lee , Jun-Cheng Chen , Ja-Ling Wu

The reliability of artificial intelligence (AI) systems in open-world settings depends heavily on their ability to flag out-of-distribution (OOD) inputs unseen during training. Recent advances in large-scale vision-language models (VLMs)…

Machine Learning · Computer Science 2025-10-14 Faizul Rakib Sayem , Shahana Ibrahim

While Out-of-distribution (OOD) detection has been well explored in computer vision, there have been relatively few prior attempts in OOD detection for NLP classification. In this paper we argue that these prior attempts do not fully…

Artificial Intelligence · Computer Science 2021-11-09 Mrinal Rawat , Ramya Hebbalaguppe , Lovekesh Vig

Accurate trajectory prediction is essential for the safe operation of autonomous vehicles in real-world environments. Even well-trained machine learning models may produce unreliable predictions due to discrepancies between training data…

Robotics · Computer Science 2025-04-24 Tongfe Guo , Taposh Banerjee , Rui Liu , Lili Su

Deep Neural Networks are actively being used in the design of autonomous Cyber-Physical Systems (CPSs). The advantage of these models is their ability to handle high-dimensional state-space and learn compact surrogate representations of the…

Machine Learning · Computer Science 2021-08-27 Shreyas Ramakrishna , Zahra Rahiminasab , Gabor Karsai , Arvind Easwaran , Abhishek Dubey