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Medical anomaly detection aims to identify abnormal findings using only normal training data, playing a crucial role in health screening and recognizing rare diseases. Reconstruction-based methods, particularly those utilizing autoencoders…

Machine Learning · Computer Science 2024-07-10 Yu Cai , Hao Chen , Kwang-Ting Cheng

In this paper, we address the anomaly detection problem where the objective is to find the anomalous processes among a given set of processes. To this end, the decision-making agent probes a subset of processes at every time instant and…

Machine Learning · Computer Science 2021-05-14 Geethu Joseph , Chen Zhong , M. Cenk Gursoy , Senem Velipasalar , Pramod K. Varshney

It is widely recognized that deep neural networks are sensitive to bias in the data. This means that during training these models are likely to learn spurious correlations between data and labels, resulting in limited generalization…

Machine Learning · Computer Science 2024-12-06 Vito Paolo Pastore , Massimiliano Ciranni , Davide Marinelli , Francesca Odone , Vittorio Murino

Anomaly Detection and Segmentation (AD&S) is crucial for industrial quality control. While existing methods excel in generating anomaly scores for each pixel, practical applications require producing a binary segmentation to identify…

Computer Vision and Pattern Recognition · Computer Science 2024-04-08 Alex Costanzino , Pierluigi Zama Ramirez , Mirko Del Moro , Agostino Aiezzo , Giuseppe Lisanti , Samuele Salti , Luigi Di Stefano

We have developed an unsupervised anomalous sound detection method for machine condition monitoring that utilizes an auxiliary task -- detecting when the target machine is active. First, we train a model that detects machine activity by…

Audio and Speech Processing · Electrical Eng. & Systems 2022-04-18 Tomoya Nishida , Kota Dohi , Takashi Endo , Masaaki Yamamoto , Yohei Kawaguchi

Anomaly detection aims to detect abnormal events by a model of normality. It plays an important role in many domains such as network intrusion detection, criminal activity identity and so on. With the rapidly growing size of accessible…

Machine Learning · Computer Science 2018-08-02 Chu Wang , Yan-Ming Zhang , Cheng-Lin Liu

Anomaly detection for time-series data has been an important research field for a long time. Seminal work on anomaly detection methods has been focussing on statistical approaches. In recent years an increasing number of machine learning…

Machine Learning · Computer Science 2020-04-02 Mohammad Braei , Sebastian Wagner

As the labor force decreases, the demand for labor-saving automatic anomalous sound detection technology that conducts maintenance of industrial equipment has grown. Conventional approaches detect anomalies based on the reconstruction…

Audio and Speech Processing · Electrical Eng. & Systems 2020-05-20 Kaori Suefusa , Tomoya Nishida , Harsh Purohit , Ryo Tanabe , Takashi Endo , Yohei Kawaguchi

Anomaly detectors address the difficult problem of detecting automatically exceptions in an arbitrary background image. Detection methods have been proposed by the thousands because each problem requires a different background model. By…

Computer Vision and Pattern Recognition · Computer Science 2019-04-26 Axel Davy , Thibaud Ehret , Jean-Michel Morel , Mauricio Delbracio

We propose the Autoencoding Binary Classifiers (ABC), a novel supervised anomaly detector based on the Autoencoder (AE). There are two main approaches in anomaly detection: supervised and unsupervised. The supervised approach accurately…

Machine Learning · Statistics 2019-03-27 Yuki Yamanaka , Tomoharu Iwata , Hiroshi Takahashi , Masanori Yamada , Sekitoshi Kanai

Anomaly detection algorithms are often thought to be limited because they don't facilitate the process of validating results performed by domain experts. In Contrast, deep learning algorithms for anomaly detection, such as autoencoders,…

Machine Learning · Computer Science 2020-07-02 Liat Antwarg , Ronnie Mindlin Miller , Bracha Shapira , Lior Rokach

Anomaly driving detection is an important problem in advanced driver assistance systems (ADAS). It is important to identify potential hazard scenarios as early as possible to avoid potential accidents. This study proposes an unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2022-03-17 Yuning Qiu , Teruhisa Misu , Carlos Busso

In anomaly detection, a prominent task is to induce a model to identify anomalies learned solely based on normal data. Generally, one is interested in finding an anomaly detector that correctly identifies anomalies, i.e., data points that…

Machine Learning · Computer Science 2022-11-28 David Schubert , Pritha Gupta , Marcel Wever

Anomaly detection from images captured using camera sensors is one of the mainstream applications at the industrial level. Particularly, it maintains the quality and optimizes the efficiency in production processes across diverse industrial…

Computer Vision and Pattern Recognition · Computer Science 2025-01-22 Abdelrahman Alzarooni , Ehtesham Iqbal , Samee Ullah Khan , Sajid Javed , Brain Moyo , Yusra Abdulrahman

Anomaly detection has many applications ranging from bank-fraud detection and cyber-threat detection to equipment maintenance and health monitoring. However, choosing a suitable algorithm for a given application remains a challenging design…

Anomaly detection techniques are essential in automating the monitoring of IT systems and operations. These techniques imply that machine learning algorithms are trained on operational data corresponding to a specific period of time and…

Machine Learning · Computer Science 2024-04-12 Lorena Poenaru-Olaru , Natalia Karpova , Luis Cruz , Jan Rellermeyer , Arie van Deursen

Inspection of insulators is important to ensure reliable operation of the power system. Deep learning is being increasingly exploited to automate the inspection process by leveraging object detection models to analyse aerial images captured…

Computer Vision and Pattern Recognition · Computer Science 2024-08-28 Laya Das , Blazhe Gjorgiev , Giovanni Sansavini

Anomaly detection is a well-established field in machine learning, identifying observations that deviate from typical patterns. The principles of anomaly detection could enhance our understanding of how biological systems recognize and…

Populations and Evolution · Quantitative Biology 2025-10-30 Steven A. Frank

Visual anomaly detection targets to detect images that notably differ from normal pattern, and it has found extensive application in identifying defective parts within the manufacturing industry. These anomaly detection paradigms…

Computer Vision and Pattern Recognition · Computer Science 2024-11-15 Anindya Sundar Das , Guansong Pang , Monowar Bhuyan

A significant limitation of one-class classification anomaly detection methods is their reliance on the assumption that unlabeled training data only contains normal instances. To overcome this impractical assumption, we propose two novel…

Machine Learning · Computer Science 2023-09-04 Le Thi Khanh Hien , Sukanya Patra , Souhaib Ben Taieb
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