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Out-of-distribution (OOD) detection plays a key role in enhancing the robustness of artificial intelligence systems by identifying inputs that differ significantly from the training distribution, thereby preventing unreliable predictions…

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…

机器学习 · 统计学 2019-09-27 Nilesh A. Ahuja , Ibrahima Ndiour , Trushant Kalyanpur , Omesh Tickoo

Being able to successfully determine whether the testing samples has similar distribution as the training samples is a fundamental question to address before we can safely deploy most of the machine learning models into practice. In this…

机器学习 · 计算机科学 2024-05-07 Zhaiming Shen , Menglun Wang , Guang Cheng , Ming-Jun Lai , Lin Mu , Ruihao Huang , Qi Liu , Hao Zhu

Despite multiple efforts made towards robust machine learning (ML) models, their vulnerability to adversarial examples remains a challenging problem that calls for rethinking the defense strategy. In this paper, we take a step back and…

机器学习 · 计算机科学 2022-02-21 Abderrahmen Amich , Birhanu Eshete

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…

计算机视觉与模式识别 · 计算机科学 2023-08-22 Ji Zhang , Lianli Gao , Bingguang Hao , Hao Huang , Jingkuan Song , Hengtao Shen

Out-of-distribution (OOD) detection is essential for determining when a supervised model encounters inputs that differ meaningfully from its training distribution. While widely studied in classification, OOD detection for regression and…

机器学习 · 统计学 2025-12-16 Min Lu , Hemant Ishwaran

Out-of-distribution detection (OOD) is a crucial technique for deploying machine learning models in the real world to handle the unseen scenarios. In this paper, we first propose a simple yet effective Neural Activation Prior (NAP) for OOD…

计算机视觉与模式识别 · 计算机科学 2024-05-27 Weilin Wan , Weizhong Zhang , Quan Zhou , Fan Yi , Cheng Jin

In this paper, we study the differences and commonalities between statistically out-of-distribution (OOD) samples and adversarial (Adv) samples, both of which hurting a text classification model's performance. We conduct analyses to compare…

计算与语言 · 计算机科学 2022-04-12 Cheng-Han Chiang , Hung-yi Lee

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…

人工智能 · 计算机科学 2023-10-13 Tinghui Ouyang , Isao Echizen , Yoshiki Seo

In the field of computer vision, fine-tuning pre-trained models has become a prevalent strategy for out-of-distribution (OOD) generalization tasks. Different from most prior work that has focused on advancing learning algorithms, we…

机器学习 · 计算机科学 2025-04-29 Hiroki Naganuma , Ryuichiro Hataya , Kotaro Yoshida , Ioannis Mitliagkas

Detecting out-of-distribution (OOD) data is a task that is receiving an increasing amount of research attention in the domain of deep learning for computer vision. However, the performance of detection methods is generally evaluated on the…

机器学习 · 计算机科学 2023-03-15 Guoxuan Xia , Christos-Savvas Bouganis

Likelihood-based deep generative models such as score-based diffusion models and variational autoencoders are state-of-the-art machine learning models approximating high-dimensional distributions of data such as images, text, or audio. One…

机器学习 · 统计学 2024-05-28 Sam Dauncey , Chris Holmes , Christopher Williams , Fabian Falck

Modern deep neural network models are known to erroneously classify out-of-distribution (OOD) test data into one of the in-distribution (ID) training classes with high confidence. This can have disastrous consequences for safety-critical…

计算机视觉与模式识别 · 计算机科学 2022-09-23 Ramya S. Hebbalaguppe , Soumya Suvra Goshal , Jatin Prakash , Harshad Khadilkar , Chetan Arora

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…

机器学习 · 计算机科学 2024-07-19 Aryan Gulati , Xingjian Dong , Carlos Hurtado , Sarath Shekkizhar , Swabha Swayamdipta , Antonio Ortega

Detecting Out-of-Domain (OOD) or unknown intents from user queries is essential in a task-oriented dialog system. Traditional softmax-based confidence scores are susceptible to the overconfidence issue. In this paper, we propose a simple…

计算与语言 · 计算机科学 2022-10-18 Yanan Wu , Zhiyuan Zeng , Keqing He , Yutao Mou , Pei Wang , Yuanmeng Yan , Weiran Xu

Deep generative models (DGMs) seem a natural fit for detecting out-of-distribution (OOD) inputs, but such models have been shown to assign higher probabilities or densities to OOD images than images from the training distribution. In this…

机器学习 · 计算机科学 2021-07-20 Lily H. Zhang , Mark Goldstein , Rajesh Ranganath

Machine learning algorithms typically assume independent and identically distributed samples in training and at test time. Much work has shown that high-performing ML classifiers can degrade significantly and provide overly-confident, wrong…

计算与语言 · 计算机科学 2023-03-09 Jie Ren , Jiaming Luo , Yao Zhao , Kundan Krishna , Mohammad Saleh , Balaji Lakshminarayanan , Peter J. Liu

Out-of-distribution (OOD) detection is indispensable for safely deploying machine learning models in the wild. One of the key challenges is that models lack supervision signals from unknown data, and as a result, can produce overconfident…

机器学习 · 计算机科学 2023-03-07 Leitian Tao , Xuefeng Du , Xiaojin Zhu , Yixuan Li

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…

机器学习 · 计算机科学 2019-07-11 Yujia Huang , Sihui Dai , Tan Nguyen , Richard G. Baraniuk , Anima Anandkumar

There is an increasing need to determine whether inputs are out-of-distribution (\emph{OOD}) for safely deploying machine learning models in the open world scenario. Typical neural classifiers are based on the closed world assumption, where…

计算机视觉与模式识别 · 计算机科学 2022-08-15 Sen Pei , Xin Zhang , Bin Fan , Gaofeng Meng