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Out-of-distribution (OOD) detection is crucial for the reliable deployment of machine learning models in real-world scenarios, enabling the identification of unknown samples or objects. A prominent approach to enhance OOD detection…

Machine Learning · Statistics 2025-08-05 Heng Gao , Jun Li

The proposed method, Discriminator Guidance, aims to improve sample generation of pre-trained diffusion models. The approach introduces a discriminator that gives explicit supervision to a denoising sample path whether it is realistic or…

Computer Vision and Pattern Recognition · Computer Science 2023-06-06 Dongjun Kim , Yeongmin Kim , Se Jung Kwon , Wanmo Kang , Il-Chul Moon

Understanding the decision-making and trusting the reliability of Deep Machine Learning Models is crucial for adopting such methods to safety-relevant applications. We extend self-explainable Prototypical Variational models with…

Machine Learning · Computer Science 2025-06-18 Conrad Orglmeister , Erik Bochinski , Volker Eiselein , Elvira Fleig

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

Recent advancements have explored text-to-image diffusion models for synthesizing out-of-distribution (OOD) samples, substantially enhancing the performance of OOD detection. However, existing approaches typically rely on perturbing…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Xin Gao , Jiyao Liu , Guanghao Li , Yueming Lyu , Jianxiong Gao , Weichen Yu , Ningsheng Xu , Liang Wang , Caifeng Shan , Ziwei Liu , Chenyang Si

The discrepancy between in-distribution (ID) and out-of-distribution (OOD) samples can lead to \textit{distributional vulnerability} in deep neural networks, which can subsequently lead to high-confidence predictions for OOD samples. This…

Machine Learning · Computer Science 2023-10-03 Zhilin Zhao , Longbing Cao , Kun-Yu Lin

Large-scale datasets may contain significant proportions of noisy (incorrect) class labels, and it is well-known that modern deep neural networks (DNNs) poorly generalize from such noisy training datasets. To mitigate the issue, we propose…

Machine Learning · Statistics 2019-05-15 Kimin Lee , Sukmin Yun , Kibok Lee , Honglak Lee , Bo Li , Jinwoo Shin

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

Deep neural networks achieve superior performance in challenging tasks such as image classification. However, deep classifiers tend to incorrectly classify out-of-distribution (OOD) inputs, which are inputs that do not belong to the…

Machine Learning · Computer Science 2019-10-24 Vahdat Abdelzad , Krzysztof Czarnecki , Rick Salay , Taylor Denounden , Sachin Vernekar , Buu Phan

When evaluating the performance of a pre-trained model transferred to a downstream task, it is imperative to assess not only the in-distribution (ID) accuracy of the downstream model but also its capacity to generalize and identify…

Machine Learning · Computer Science 2024-04-02 Andrew Geng , Pin-Yu Chen

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

Deep neural networks often struggle to recognize when an input lies outside their training experience, leading to unreliable and overconfident predictions. Building dependable machine learning systems therefore requires methods that can…

Machine Learning · Computer Science 2025-12-02 Pirzada Suhail , Rehna Afroz , Amit Sethi

Detecting out-of-distribution (OOD) samples is crucial to the safe deployment of a classifier in the real world. However, deep neural networks are known to be overconfident for abnormal data. Existing works directly design score function by…

Computer Vision and Pattern Recognition · Computer Science 2023-01-06 Wenyu Jiang , Yuxin Ge , Hao Cheng , Mingcai Chen , Shuai Feng , Chongjun Wang

Out-of-distribution (OOD) detection is crucial for ensuring the reliability of deep learning models in real-world applications. Existing methods typically focus on feature representations or output-space analysis, often assuming a…

Computer Vision and Pattern Recognition · Computer Science 2025-09-18 Mostafa ElAraby , Sabyasachi Sahoo , Yann Pequignot , Paul Novello , Liam Paull

Deep neural networks (DNNs) are often constructed under the closed-world assumption, which may fail to generalize to the out-of-distribution (OOD) data. This leads to DNNs producing overconfident wrong predictions and can result in…

Machine Learning · Statistics 2024-12-31 Yang Chen , Chih-Li Sung , Arpan Kusari , Xiaoyang Song , Wenbo Sun

Machine learning methods must be trusted to make appropriate decisions in real-world environments, even when faced with out-of-distribution (OOD) samples. Many current approaches simply aim to detect OOD examples and alert the user when an…

Machine Learning · Computer Science 2022-09-13 Randolph Linderman , Jingyang Zhang , Nathan Inkawhich , Hai Li , Yiran Chen

Out-of-distribution (OOD) detection is crucial to safety-critical machine learning applications and has been extensively studied. While recent studies have predominantly focused on classifier-based methods, research on deep generative model…

Machine Learning · Computer Science 2024-02-19 Genki Osada , Tsubasa Takahashi , Takashi Nishide

Out-of-distribution (OOD) detection is critical for ensuring the reliability of deep learning systems, particularly in safety-critical applications. Likelihood-based deep generative models have historically faced criticism for their…

Machine Learning · Computer Science 2025-07-11 Yifan Ding , Arturas Aleksandraus , Amirhossein Ahmadian , Jonas Unger , Fredrik Lindsten , Gabriel Eilertsen

Out-of-distribution (OOD) detection is essential for reliably deploying machine learning models in the wild. Yet, most methods treat large pre-trained models as monolithic encoders and rely solely on their final-layer representations for…

Computer Vision and Pattern Recognition · Computer Science 2025-10-21 I. M. De la Jara , C. Rodriguez-Opazo , D. Teney , D. Ranasinghe , E. Abbasnejad

Implicit generative models have the capability to learn arbitrary complex data distributions. On the downside, training requires telling apart real data from artificially-generated ones using adversarial discriminators, leading to unstable…

Machine Learning · Computer Science 2024-02-27 José Manuel de Frutos , Pablo M. Olmos , Manuel A. Vázquez , Joaquín Míguez