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In a corpus of data, outliers are either errors: mistakes in the data that are counterproductive, or are unique: informative samples that improve model robustness. Identifying outliers can lead to better datasets by (1) removing noise in…

For real-world language applications, detecting an out-of-distribution (OOD) sample is helpful to alert users or reject such unreliable samples. However, modern over-parameterized language models often produce overconfident predictions for…

计算与语言 · 计算机科学 2023-07-20 Jaeyoung Kim , Kyuheon Jung , Dongbin Na , Sion Jang , Eunbin Park , Sungchul Choi

Detecting out-of-distribution (OOD) samples is essential when deploying machine learning models in open-world scenarios. Zero-shot OOD detection, requiring no training on in-distribution (ID) data, has been possible with the advent of…

机器学习 · 计算机科学 2024-06-04 Chentao Cao , Zhun Zhong , Zhanke Zhou , Yang Liu , Tongliang Liu , Bo Han

Out-of-distribution (OOD) detection is essential for ensuring the reliability of deep learning models operating in open-world scenarios. Current OOD detectors mainly rely on statistical models to identify unusual patterns in the latent…

机器学习 · 计算机科学 2025-06-06 Konstantin Kirchheim , Frank Ortmeier

Reliable out-of-distribution (OOD) detection is fundamental to implementing safer modern machine learning (ML) systems. In this paper, we introduce Igeood, an effective method for detecting OOD samples. Igeood applies to any pre-trained…

Modern neural networks are known to give overconfident prediction for out-of-distribution inputs when deployed in the open world. It is common practice to leverage a surrogate outlier dataset to regularize the model during training, and…

机器学习 · 计算机科学 2024-02-27 Wenyu Jiang , Hao Cheng , Mingcai Chen , Chongjun Wang , Hongxin Wei

This paper introduces a novel method leveraging bi-encoder-based detectors along with a comprehensive study comparing different out-of-distribution (OOD) detection methods in NLP using different feature extractors. The feature extraction…

计算与语言 · 计算机科学 2024-03-14 Louis Owen , Biddwan Ahmed , Abhay Kumar

Outlier detection (OD) has received continuous research interests due to its wide applications. With the development of deep learning, increasingly deep OD algorithms are proposed. Despite the availability of numerous deep OD models,…

机器学习 · 计算机科学 2023-05-29 Yihong Huang , Yuang Zhang , Liping Wang , Xuemin Lin

Clustering and outlier detection are two important tasks in data mining. Outliers frequently interfere with clustering algorithms to determine the similarity between objects, resulting in unreliable clustering results. Currently, only a few…

机器学习 · 计算机科学 2024-12-10 Qi Li , Shuliang Wang

Utilizing auxiliary outlier datasets to regularize the machine learning model has demonstrated promise for out-of-distribution (OOD) detection and safe prediction. Due to the labor intensity in data collection and cleaning, automating…

机器学习 · 计算机科学 2023-09-26 Xuefeng Du , Yiyou Sun , Xiaojin Zhu , Yixuan Li

The ability to detect objects that are not prevalent in the training set is a critical capability in many 3D applications, including autonomous driving. Machine learning methods for object recognition often assume that all object categories…

计算机视觉与模式识别 · 计算机科学 2025-07-02 Zizhao Li , Xueyang Kang , Joseph West , Kourosh Khoshelham

In recent years, online learning has attracted increasing attention due to its adaptive capability to process streaming and non-stationary data. To facilitate algorithm development and practical deployment in this area, we introduce…

机器学习 · 计算机科学 2025-07-29 Zeyi Liu , Songqiao Hu , Pengyu Han , Jiaming Liu , Xiao He

Out-of-Distribution (OOD) detection is crucial for the reliable deployment of machine learning models in-the-wild, enabling accurate identification of test samples that differ from the training data distribution. Existing methods rely on…

计算机视觉与模式识别 · 计算机科学 2025-08-15 Ruisong Han , Zongbo Han , Jiahao Zhang , Mingyue Cheng , Changqing Zhang

State-of-the-art models can perform well in controlled environments, but they often struggle when presented with out-of-distribution (OOD) examples, making OOD detection a critical component of NLP systems. In this paper, we focus on…

计算与语言 · 计算机科学 2023-07-17 Mateusz Baran , Joanna Baran , Mateusz Wójcik , Maciej Zięba , Adam Gonczarek

We propose two new outlier detection methods, for identifying and classifying different types of outliers in (big) functional data sets. The proposed methods are based on an existing method called Massive Unsupervised Outlier Detection…

统计方法学 · 统计学 2021-10-15 Oluwasegun Taiwo Ojo , Antonio Fernández Anta , Rosa E. Lillo , Carlo Sguera

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) robustness is a critical challenge for modern machine learning systems, particularly as they increasingly operate in multimodal settings involving inputs like video, audio, and sensor data. Currently, many OOD…

机器学习 · 计算机科学 2026-02-23 Yuehan Qin , Li Li , Defu Cao , Tiankai Yang , Jiate Li , Yue Zhao

Out-of-distribution (OOD) detection is essential for deploying machine learning models in open-world and safety-critical scenarios, where test inputs may deviate from the training distribution and overconfident predictions on unknown…

机器学习 · 计算机科学 2026-05-28 Fengqiang Wan , Qing-Yuan Jiang , Yang Yang

Outlier detection in tabular data is crucial for safeguarding data integrity in high-stakes domains such as cybersecurity, financial fraud detection, and healthcare, where anomalies can cause serious operational and economic impacts.…

机器学习 · 计算机科学 2025-10-13 Yihao Ang , Peicheng Yao , Yifan Bao , Yushuo Feng , Qiang Huang , Anthony K. H. Tung , Zhiyong Huang

Open-world machine learning (ML) combines closed-world models trained on in-distribution data with out-of-distribution (OOD) detectors, which aim to detect and reject OOD inputs. Previous works on open-world ML systems usually fail to test…

机器学习 · 计算机科学 2020-07-10 Liwei Song , Vikash Sehwag , Arjun Nitin Bhagoji , Prateek Mittal