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Anomaly detection is a method for discovering unusual and suspicious behavior. In many real-world scenarios, the examined events can be directly linked to the actions of an adversary, such as attacks on computer networks or frauds in…

Generative Adversarial Networks (GANs) have proven to be a powerful framework for learning to draw samples from complex distributions. However, GANs are also notoriously difficult to train, with mode collapse and oscillations a common…

机器学习 · 统计学 2018-11-28 Kevin J Liang , Chunyuan Li , Guoyin Wang , Lawrence Carin

This study presents an adversarial method for anomaly detection in real-world applications, leveraging the power of generative adversarial neural networks (GANs) through cycle consistency in reconstruction error. Previous methods suffer…

机器学习 · 计算机科学 2024-05-01 Zahra Dehghanian , Saeed Saravani , Maryam Amirmazlaghani , Mohammad Rahmati

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

Anomaly detection is to recognize samples that differ in some respect from the training observations. These samples which do not conform to the distribution of normal data are called outliers or anomalies. In real-world anomaly detection…

计算机视觉与模式识别 · 计算机科学 2022-07-05 Vahid Reza Khazaie , Anthony Wong , Yalda Mohsenzadeh

Anomaly detection in time series data, to identify points that deviate from normal behaviour, is a common problem in various domains such as manufacturing, medical imaging, and cybersecurity. Recently, Generative Adversarial Networks (GANs)…

机器学习 · 计算机科学 2025-05-27 Md Abul Bashar , Richi Nayak

Supervised classification methods have been widely utilized for the quality assurance of the advanced manufacturing process, such as additive manufacturing (AM) for anomaly (defects) detection. However, since abnormal states (with defects)…

机器学习 · 计算机科学 2022-11-29 Jihoon Chung , Bo Shen , Zhenyu , Kong

In recent years, Generative Adversarial Networks (GANs) have shown substantial progress in modeling complex distributions of data. These networks have received tremendous attention since they can generate implicit probabilistic models that…

信号处理 · 电气工程与系统科学 2018-10-25 Mehdi Ahmadi , Timothy Nest , Mostafa Abdelnaim , Thanh-Dung Le

The external visual inspections of rolling stock's underfloor equipment are currently being performed via human visual inspection. In this study, we attempt to partly automate visual inspection by investigating anomaly inspection algorithms…

计算机视觉与模式识别 · 计算机科学 2022-12-23 Yohei Baba , Takuro Hoshi , Ryosuke Mori , Gaurang Gavai

In this study, a new Anomaly Detection (AD) approach for industrial and medical images is proposed. This method leverages the theoretical strengths of unsupervised learning and the data availability of both normal and abnormal classes.…

计算机视觉与模式识别 · 计算机科学 2024-01-24 Arnaud Bougaham , Valentin Delchevalerie , Mohammed El Adoui , Benoît Frénay

Anomaly detection is the task of identifying abnormal behavior of a system. Anomaly detection in computational workflows is of special interest because of its wide implications in various domains such as cybersecurity, finance, and social…

A popular method for anomaly detection is to use the generator of an adversarial network to formulate anomaly scores over reconstruction loss of input. Due to the rare occurrence of anomalies, optimizing such networks can be a cumbersome…

计算机视觉与模式识别 · 计算机科学 2020-06-22 Muhammad Zaigham Zaheer , Jin-ha Lee , Marcella Astrid , Seung-Ik Lee

As a kind of generative self-supervised learning methods, generative adversarial nets have been widely studied in the field of anomaly detection. However, the representation learning ability of the generator is limited since it pays too…

计算机视觉与模式识别 · 计算机科学 2021-07-28 Xuan Xia , Xizhou Pan , Xing He , Jingfei Zhang , Ning Ding , Lin Ma

From generating never-before-seen images to domain adaptation, applications of Generative Adversarial Networks (GANs) spread wide in the domain of vision and graphics problems. With the remarkable ability of GANs in learning the…

计算机视觉与模式识别 · 计算机科学 2021-02-23 Saman Motamed , Farzad Khalvati

Deep anomaly detection methods have become increasingly popular in recent years, with methods like Stacked Autoencoders, Variational Autoencoders, and Generative Adversarial Networks greatly improving the state-of-the-art. Other methods…

计算与语言 · 计算机科学 2024-01-09 Andrei Manolache

With the increase in the learning capability of deep convolution-based architectures, various applications of such models have been proposed over time. In the field of anomaly detection, improvements in deep learning opened new prospects of…

计算机视觉与模式识别 · 计算机科学 2021-05-25 Jin-Ha Lee , Marcella Astrid , Muhammad Zaigham Zaheer , Seung-Ik Lee

We present a novel method for image anomaly detection, where algorithms that use samples drawn from some distribution of "normal" data, aim to detect out-of-distribution (abnormal) samples. Our approach includes a combination of encoder and…

图像与视频处理 · 电气工程与系统科学 2020-03-02 Nina Tuluptceva , Bart Bakker , Irina Fedulova , Anton Konushin

The deep generative adversarial networks (GAN) recently have been shown to be promising for different computer vision applications, like image edit- ing, synthesizing high resolution images, generating videos, etc. These networks and the…

计算机视觉与模式识别 · 计算机科学 2018-04-18 Ali Diba , Vivek Sharma , Rainer Stiefelhagen , Luc Van Gool

One of the most significant challenges in statistical signal processing and machine learning is how to obtain a generative model that can produce samples of large-scale data distribution, such as images and speeches. Generative Adversarial…

计算机视觉与模式识别 · 计算机科学 2020-05-28 Pegah Salehi , Abdolah Chalechale , Maryam Taghizadeh

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