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X-ray baggage security screening is in widespread use and crucial to maintaining transport security for threat/anomaly detection tasks. The automatic detection of anomaly, which is concealed within cluttered and complex…

Computer Vision and Pattern Recognition · Computer Science 2022-11-01 Neelanjan Bhowmik , Toby P. Breckon

Overhead line inspection greatly benefits from defect recognition using visible light imagery. Addressing the limitations of existing feature extraction techniques and the heavy data dependency of deep learning approaches, this paper…

Computer Vision and Pattern Recognition · Computer Science 2023-12-08 Weixi Wang , Xichen Zhong , Xin Li , Sizhe Li , Xun Ma

Reliable detection of anomalies is crucial when deploying machine learning models in practice, but remains challenging due to the lack of labeled data. To tackle this challenge, contrastive learning approaches are becoming increasingly…

Computer Vision and Pattern Recognition · Computer Science 2021-07-19 Puck de Haan , Sindy Löwe

Anomaly detection is a critical requirement for ensuring safety in autonomous driving. In this work, we leverage Cooperative Perception to share information across nearby vehicles, enabling more accurate identification and consensus of…

Multiagent Systems · Computer Science 2025-01-30 Ashish Bastola , Hao Wang , Abolfazl Razi

Mobile network operators must monitor thousands of heterogeneous network elements across the radio access network and the packet core, each exposing high-dimensional KPI time series. The scale and cost of incident labelling make supervised…

Machine Learning · Computer Science 2026-05-04 Sara Malacarne , Eirik Hoel-Høiseth , Erlend Aune , David Zsolt Biró , Massimiliano Ruocco

Anomaly localization is an important problem in computer vision which involves localizing anomalous regions within images with applications in industrial inspection, surveillance, and medical imaging. This task is challenging due to the…

Computer Vision and Pattern Recognition · Computer Science 2020-07-20 Shashanka Venkataramanan , Kuan-Chuan Peng , Rajat Vikram Singh , Abhijit Mahalanobis

Recent advances in semi-supervised object detection (SSOD) are largely driven by consistency-based pseudo-labeling methods for image classification tasks, producing pseudo labels as supervisory signals. However, when using pseudo labels,…

Computer Vision and Pattern Recognition · Computer Science 2022-01-03 Hengduo Li , Zuxuan Wu , Abhinav Shrivastava , Larry S. Davis

Anomaly Detection (AD) focuses on detecting samples that differ from the standard pattern, making it a vital tool in process control. Logical anomalies may appear visually normal yet violate predefined constraints on object presence,…

Computer Vision and Pattern Recognition · Computer Science 2025-05-21 Yejin Kwon , Daeun Moon , Youngje Oh , Hyunsoo Yoon

Recent developments for Semi-Supervised Object Detection (SSOD) have shown the promise of leveraging unlabeled data to improve an object detector. However, thus far these methods have assumed that the unlabeled data does not contain…

Computer Vision and Pattern Recognition · Computer Science 2022-08-30 Yen-Cheng Liu , Chih-Yao Ma , Xiaoliang Dai , Junjiao Tian , Peter Vajda , Zijian He , Zsolt Kira

The goal of unsupervised anomaly segmentation (UAS) is to detect the pixel-level anomalies unseen during training. It is a promising field in the medical imaging community, e.g, we can use the model trained with only healthy data to segment…

Image and Video Processing · Electrical Eng. & Systems 2021-03-17 Chenxin Li , Yunlong Zhang , Jiongcheng Li , Yue Huang , Xinghao Ding

Semantic segmentation requires extensive pixel-level annotation, motivating unsupervised domain adaptation (UDA) to transfer knowledge from labelled source domains to unlabelled or weakly labelled target domains. One of the most efficient…

Computer Vision and Pattern Recognition · Computer Science 2025-04-08 Jongmin Yu , Zhongtian Sun , Chen Bene Chi , Jinhong Yang , Shan Luo

Panoptic segmentation aims to address semantic and instance segmentation simultaneously in a unified framework. However, an efficient solution of panoptic segmentation in applications like autonomous driving is still an open research…

Computer Vision and Pattern Recognition · Computer Science 2021-09-01 Enxu Li , Ryan Razani , Yixuan Xu , Liu Bingbing

The difficulty of pixel-level annotation has significantly hindered the development of the Camouflaged Object Detection (COD) field. To save on annotation costs, previous works leverage the semi-supervised COD framework that relies on a…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Weiqi Yan , Lvhai Chen , Shengchuan Zhang , Yan Zhang , Liujuan Cao

Detecting anomaly patterns from images is a crucial artificial intelligence technique in industrial applications. Recent research in this domain has emphasized the necessity of a large volume of training data, overlooking the practical…

Computer Vision and Pattern Recognition · Computer Science 2025-07-30 Shenxing Wei , Xing Wei , Zhiheng Ma , Songlin Dong , Shaochen Zhang , Yihong Gong

Deep learning has emerged as an effective solution for solving the task of object detection in images but at the cost of requiring large labeled datasets. To mitigate this cost, semi-supervised object detection methods, which consist in…

Computer Vision and Pattern Recognition · Computer Science 2025-02-18 Renaud Vandeghen , Gilles Louppe , Marc Van Droogenbroeck

Anomaly detection is a fundamental problem in computer vision area with many real-world applications. Given a wide range of images belonging to the normal class, emerging from some distribution, the objective of this task is to construct…

Computer Vision and Pattern Recognition · Computer Science 2020-07-15 Chengwei Chen , Pan Chen , Haichuan Song , Yiqing Tao , Yuan Xie , Shouhong Ding , Lizhuang Ma

Anomaly detection (AD) plays an important role in numerous applications. We focus on two understudied aspects of AD that are critical for integration into real-world applications. First, most AD methods cannot incorporate labeled data that…

Machine Learning · Computer Science 2023-06-06 Chun-Hao Chang , Jinsung Yoon , Sercan Arik , Madeleine Udell , Tomas Pfister

Zero-shot anomaly classification (AC) and segmentation (AS) methods aim to identify and outline defects without using any labeled samples. In this paper, we reveal a key property that is overlooked by existing methods: normal image patches…

Computer Vision and Pattern Recognition · Computer Science 2026-04-28 Xurui Li , Feng Xue , Yu Zhou

Weakly supervised object detection (WSOD) aims to classify and locate objects with only image-level supervision. Many WSOD approaches adopt multiple instance learning as the initial model, which is prone to converge to the most…

Computer Vision and Pattern Recognition · Computer Science 2020-11-23 Wenlong Gao , Ying Chen , Yong Peng

We study anomaly detection and introduce an algorithm that processes variable length, irregularly sampled sequences or sequences with missing values. Our algorithm is fully unsupervised, however, can be readily extended to supervised or…

Machine Learning · Statistics 2020-05-26 Oguzhan Karaahmetoglu , Fatih Ilhan , Ismail Balaban , Suleyman Serdar Kozat