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Time series anomaly detection (TSAD) has long been a hot research topic in data mining due to its various applications. Recent studies challenge the effectiveness of popular deep learning methods for TSAD, suggesting their failure in…

Machine Learning · Computer Science 2026-05-29 Qideng Tang , Dai Chaofan , Wubin Ma , Yahui Wu , Haohao Zhou , Tao Zhang , Huan Li , Dalin Zhang

Unsupervised domain adaptive semantic segmentation (UDA-SS) aims to train a model on the source domain data (e.g., synthetic) and adapt the model to predict target domain data (e.g., real-world) without accessing target annotation data.…

Computer Vision and Pattern Recognition · Computer Science 2024-10-29 Md. Al-Masrur Khan , Zheng Chen , Lantao Liu

Intelligent anomaly detection in dynamic visual environments requires reconciling real-time performance with semantic interpretability. Conventional approaches address only fragments of this challenge. Reconstruction-based models capture…

Computer Vision and Pattern Recognition · Computer Science 2026-01-19 Tayyab Rehman , Giovanni De Gasperis , Aly Shmahell

Industrial anomaly detection has attracted significant attention as a fundamental challenge in industrial systems. The rapid advancement of heterogeneous industrial sensors has driven industrial anomaly detection from unimodal to multimodal…

Machine Learning · Computer Science 2026-05-26 Heqiang Wang , Weihong Yang , Zheyuan Yang , Jia Zhou , Xiaoxiong Zhong , Fangming Liu , Weizhe Zhang

Time series anomaly detection holds notable importance for risk identification and fault detection across diverse application domains. Unsupervised learning methods have become popular because they have no requirement for labels. However,…

Machine Learning · Computer Science 2025-05-05 Wenxin Zhang , Xiaojian Lin , Wenjun Yu , Guangzhen Yao , jingxiang Zhong , Yu Li , Renda Han , Songcheng Xu , Hao Shi , Cuicui Luo

The ongoing challenges in time series anomaly detection (TSAD), notably the scarcity of anomaly labels and the variability in anomaly lengths and shapes, have led to the need for a more efficient solution. As limited anomaly labels hinder…

Machine Learning · Computer Science 2023-11-28 Yuting Sun , Guansong Pang , Guanhua Ye , Tong Chen , Xia Hu , Hongzhi Yin

Anomaly detection is facing with emerging challenges in many important industry domains, such as cyber security and online recommendation and advertising. The recent trend in these areas calls for anomaly detection on time-evolving data…

Machine Learning · Computer Science 2019-07-16 Zheng Gao , Lin Guo , Chi Ma , Xiao Ma , Kai Sun , Hang Xiang , Xiaoqiang Zhu , Hongsong Li , Xiaozhong Liu

Time series anomaly detection is a critical task across various industrial domains. However, capturing temporal dependencies and multivariate correlations within patch-level representation learning remains underexplored, and reliance on…

Machine Learning · Computer Science 2026-02-04 Jinwoo Park , Hyeongwon Kang , Seung Hun Han , Pilsung Kang

Existing approaches for unsupervised domain adaptive object detection perform feature alignment via adversarial training. While these methods achieve reasonable improvements in performance, they typically perform category-agnostic domain…

Computer Vision and Pattern Recognition · Computer Science 2021-04-06 Vibashan VS , Vikram Gupta , Poojan Oza , Vishwanath A. Sindagi , Vishal M. Patel

Domain adaptation is critical for success in new, unseen environments. Adversarial adaptation models applied in feature spaces discover domain invariant representations, but are difficult to visualize and sometimes fail to capture…

Computer Vision and Pattern Recognition · Computer Science 2018-01-01 Judy Hoffman , Eric Tzeng , Taesung Park , Jun-Yan Zhu , Phillip Isola , Kate Saenko , Alexei A. Efros , Trevor Darrell

We propose a novel statistical method for testing the results of anomaly detection (AD) under domain adaptation (DA), which we call CAD-DA -- controllable AD under DA. The distinct advantage of the CAD-DA lies in its ability to control the…

Machine Learning · Statistics 2023-10-24 Vo Nguyen Le Duy , Hsuan-Tien Lin , Ichiro Takeuchi

Anomaly detection (AD) is a fundamental task of critical importance across numerous domains. Current systems increasingly operate in rapidly evolving environments that generate diverse yet interconnected data modalities -- such as time…

Machine Learning · Computer Science 2025-12-02 Zhongyuan Wu , Jingyuan Wang , Zexuan Cheng , Yilong Zhou , Weizhi Wang , Juhua Pu , Chao Li , Changqing Ma

Modern software systems generate extensive heterogeneous log data with dynamic formats, fragmented event sequences, and varying temporal patterns, making anomaly detection both crucial and challenging. To address these complexities, we…

Artificial Intelligence · Computer Science 2025-12-17 Przemek Pospieszny , Wojciech Mormul , Karolina Szyndler , Sanjeev Kumar

Anomaly detection and root cause analysis (RCA) are critical for ensuring the safety and resilience of cyber-physical systems such as power grids. However, existing machine learning models for time series anomaly detection often operate as…

Machine Learning · Computer Science 2026-02-16 Yue Sun , Likai Wang , Rick S. Blum , Parv Venkitasubramaniam

Continual Test-Time Adaptation (CTTA) is proposed to migrate a source pre-trained model to continually changing target distributions, addressing real-world dynamism. Existing CTTA methods mainly rely on entropy minimization or…

Computer Vision and Pattern Recognition · Computer Science 2024-03-28 Jiaming Liu , Ran Xu , Senqiao Yang , Renrui Zhang , Qizhe Zhang , Zehui Chen , Yandong Guo , Shanghang Zhang

With the widespread success of deep learning in biomedical image segmentation, domain shift becomes a critical and challenging problem, as the gap between two domains can severely affect model performance when deployed to unseen data with…

Computer Vision and Pattern Recognition · Computer Science 2021-03-04 Ping Gong , Wenwen Yu , Qiuwen Sun , Ruohan Zhao , Junfeng Hu

Although action recognition has achieved impressive results over recent years, both collection and annotation of video training data are still time-consuming and cost intensive. Therefore, image-to-video adaptation has been proposed to…

Computer Vision and Pattern Recognition · Computer Science 2023-03-23 Wei Lin , Anna Kukleva , Kunyang Sun , Horst Possegger , Hilde Kuehne , Horst Bischof

Continual domain shift poses a significant challenge in real-world applications, particularly in situations where labeled data is not available for new domains. The challenge of acquiring knowledge in this problem setting is referred to as…

Machine Learning · Computer Science 2023-10-16 Wonguk Cho , Jinha Park , Taesup Kim

Unsupervised Domain Adaptation (UDA) endeavors to adjust models trained on a source domain to perform well on a target domain without requiring additional annotations. In the context of domain adaptive semantic segmentation, which tackles…

Computer Vision and Pattern Recognition · Computer Science 2024-03-25 Wenlve Zhou , Zhiheng Zhou , Tianlei Wang , Delu Zeng

Semi-supervised Learning plays a crucial role in network anomaly detection applications, however, learning anomaly patterns with limited labeled samples is not easy. Additionally, the lack of interpretability creates key barriers to the…

Machine Learning · Computer Science 2025-11-11 Yachao Yuan , Yu Huang , Yingwen Wu , Jin Wang