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Medical anomaly detection is a critical research area aimed at recognizing abnormal images to aid in diagnosis.Most existing methods adopt synthetic anomalies and image restoration on normal samples to detect anomaly. The unlabeled data…

图像与视频处理 · 电气工程与系统科学 2024-05-22 Zerui Zhang , Zhichao Sun , Zelong Liu , Bo Du , Rui Yu , Zhou Zhao , Yongchao Xu

Anomaly detection plays in many fields of research, along with the strongly related task of outlier detection, a very important role. Especially within the context of the automated analysis of video material recorded by surveillance…

计算机视觉与模式识别 · 计算机科学 2019-08-09 Thomas Golda , Nils Murzyn , Chengchao Qu , Kristian Kroschel

Anomaly detection is a difficult problem in many areas and has recently been subject to a lot of attention. Classifying unseen data as anomalous is a challenging matter. Latest proposed methods rely on Generative Adversarial Networks (GANs)…

计算机视觉与模式识别 · 计算机科学 2020-03-17 Pierrick Chatillon , Coloma Ballester

Time series anomaly detection plays a critical role in automated monitoring systems. Most previous deep learning efforts related to time series anomaly detection were based on recurrent neural networks (RNN). In this paper, we propose a…

机器学习 · 计算机科学 2019-06-03 Tailai Wen , Roy Keyes

Recent works have demonstrated the superiority of supervised Convolutional Neural Networks (CNNs) in learning hierarchical representations from time series data for successful classification. These methods require sufficiently large labeled…

机器学习 · 计算机科学 2023-09-12 Fanling Huang , Yangdong Deng

Over the last two decades, a lot of work has been done in improving network security, particularly in intrusion detection systems (IDS) and anomaly detection. Machine learning solutions have also been employed in IDSs to detect known and…

密码学与安全 · 计算机科学 2022-03-22 Sankha Das

In this paper we address the abnormality detection problem in crowded scenes. We propose to use Generative Adversarial Nets (GANs), which are trained using normal frames and corresponding optical-flow images in order to learn an internal…

计算机视觉与模式识别 · 计算机科学 2017-09-01 Mahdyar Ravanbakhsh , Moin Nabi , Enver Sangineto , Lucio Marcenaro , Carlo Regazzoni , Nicu Sebe

Anomaly detection is a significant and hence well-studied problem. However, developing effective anomaly detection methods for complex and high-dimensional data remains a challenge. As Generative Adversarial Networks (GANs) are able to…

机器学习 · 计算机科学 2018-12-07 Houssam Zenati , Manon Romain , Chuan Sheng Foo , Bruno Lecouat , Vijay Ramaseshan Chandrasekhar

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…

计算机视觉与模式识别 · 计算机科学 2020-07-15 Chengwei Chen , Pan Chen , Haichuan Song , Yiqing Tao , Yuan Xie , Shouhong Ding , Lizhuang Ma

Identifying anomalies refers to detecting samples that do not resemble the training data distribution. Many generative models have been used to find anomalies, and among them, generative adversarial network (GAN)-based approaches are…

机器学习 · 计算机科学 2022-01-03 Laya Rafiee Sevyeri , Thomas Fevens

In many anomaly detection tasks, where anomalous data rarely appear and are difficult to collect, training using only normal data is important. Although it is possible to manually create anomalous data using prior knowledge, they may be…

机器学习 · 计算机科学 2022-05-10 Hironori Murase , Kenji Fukumizu

Quantum computing may offer new approaches for advancing machine learning, including in complex tasks such as anomaly detection in network traffic. In this paper, we introduce a quantum generative adversarial network (QGAN) architecture for…

机器学习 · 计算机科学 2025-05-20 Wajdi Hammami , Soumaya Cherkaoui , Shengrui Wang

Unsupervised anomaly detection in time series is essential in industrial applications, as it significantly reduces the need for manual intervention. Multivariate time series pose a complex challenge due to their feature and temporal…

机器学习 · 计算机科学 2024-08-26 Zhe Liu , Xiang Huang , Jingyun Zhang , Zhifeng Hao , Li Sun , Hao Peng

Generative adversarial networks (GANs) studies have grown exponentially in the past few years. Their impact has been seen mainly in the computer vision field with realistic image and video manipulation, especially generation, making…

机器学习 · 计算机科学 2021-07-26 Eoin Brophy , Zhengwei Wang , Qi She , Tomas Ward

Current Generative Adversarial Network (GAN)-based approaches for time series generation face challenges such as suboptimal convergence, information loss in embedding spaces, and instability. To overcome these challenges, we introduce an…

机器学习 · 计算机科学 2024-10-29 MohammadReza EskandariNasab , Shah Muhammad Hamdi , Soukaina Filali Boubrahimi

In this paper, we employ a 1D deep convolutional generative adversarial network (DCGAN) for sequential anomaly detection in energy time series data. Anomaly detection involves gradient descent to reconstruct energy sub-sequences,…

机器学习 · 计算机科学 2024-02-23 Hardik Prabhu , Jayaraman Valadi , Pandarasamy Arjunan

Anomaly detection is often considered a challenging field of machine learning due to the difficulty of obtaining anomalous samples for training and the need to obtain a sufficient amount of training data. In recent years, autoencoders have…

机器学习 · 计算机科学 2018-10-15 Yotam Intrator , Gilad Katz , Asaf Shabtai

Deep Neural Networks (DNNs) have been shown vulnerable to Test-Time Evasion attacks (TTEs, or adversarial examples), which, by making small changes to the input, alter the DNN's decision. We propose an unsupervised attack detector on DNN…

机器学习 · 计算机科学 2022-05-13 Hang Wang , David J. Miller , George Kesidis

Anomaly detection suffered from the lack of anomalies due to the diversity of abnormalities and the difficulties of obtaining large-scale anomaly data. Semi-supervised anomaly detection methods are often used to solely leverage normal data…

计算机视觉与模式识别 · 计算机科学 2023-04-11 Jian Shi , Ni Zhang

Generative adversarial networks have been able to generate striking results in various domains. This generation capability can be general while the networks gain deep understanding regarding the data distribution. In many domains, this data…

机器学习 · 计算机科学 2019-09-16 Milad Salem , Shayan Taheri , Jiann Shiun Yuan