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Anomalous Sound Detection (ASD) aims at identifying anomalous sounds from machines and has gained extensive research interests from both academia and industry. However, the uncertainty of anomaly location and much redundant information such…

Sound · Computer Science 2025-08-22 Guirui Zhong , Qing Wang , Jun Du , Lei Wang , Mingqi Cai , Xin Fang

Anomaly detection (AD) under data contamination is critical for deploying unsupervised defect detection in industrial environments, where curating perfectly clean training sets is impractical. However, existing methods are sensitive to…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Sirojbek Safarov , Jaewoo Park , Yoon Gyo Jung , Kuan-Chuan Peng , Wonchul Kim , Seongdeok Bang , Octavia Camps

Industrial anomaly detection is an important task within computer vision with a wide range of practical use cases. The small size of anomalous regions in many real-world datasets necessitates processing the images at a high resolution. This…

Computer Vision and Pattern Recognition · Computer Science 2024-04-10 Blaž Rolih , Dick Ameln , Ashwin Vaidya , Samet Akcay

The detection and localization of anomalies is one important medical image analysis task. Most commonly, Computer Vision anomaly detection approaches rely on manual annotations that are both time consuming and expensive to obtain.…

Computer Vision and Pattern Recognition · Computer Science 2023-11-14 Sergio Naval Marimont , Giacomo Tarroni

Generative Adversarial Networks (GANs) have made a dramatic leap in high-fidelity image synthesis and stylized face generation. Recently, a layer-swapping mechanism has been developed to improve the stylization performance. However, this…

Computer Vision and Pattern Recognition · Computer Science 2021-10-25 Mingcong Liu , Qiang Li , Zekui Qin , Guoxin Zhang , Pengfei Wan , Wen Zheng

Anomaly inspection plays an important role in industrial manufacture. Existing anomaly inspection methods are limited in their performance due to insufficient anomaly data. Although anomaly generation methods have been proposed to augment…

Computer Vision and Pattern Recognition · Computer Science 2024-02-23 Teng Hu , Jiangning Zhang , Ran Yi , Yuzhen Du , Xu Chen , Liang Liu , Yabiao Wang , Chengjie Wang

Graph anomaly detection (GAD) has garnered increasing attention in recent years, yet remains challenging due to two key factors: (1) label scarcity stemming from the high cost of annotations and (2) homophily disparity at node and class…

Machine Learning · Computer Science 2026-01-30 Yunhui Liu , Jiashun Cheng , Yiqing Lin , Qizhuo Xie , Jia Li , Fugee Tsung , Hongzhi Yin , Tao Zheng , Jianhua Zhao , Tieke He

This paper presents a novel anomaly detection methodology termed Statistical Aggregated Anomaly Detection (SAAD). The SAAD approach integrates advanced statistical techniques with machine learning, and its efficacy is demonstrated through…

Machine Learning · Computer Science 2024-06-14 Dacian Goina , Eduard Hogea , George Maties

Anomaly detection is a critical problem in the manufacturing industry. In many applications, images of objects to be analyzed are captured from multiple perspectives which can be exploited to improve the robustness of anomaly detection. In…

Computer Vision and Pattern Recognition · Computer Science 2021-09-01 Peter Jakob , Manav Madan , Tobias Schmid-Schirling , Abhinav Valada

Anomaly generation is an effective way to mitigate data scarcity for anomaly detection task. Most existing works shine at industrial anomaly generation with multiple specialists or large generative models, rarely generalizing to anomalies…

Computer Vision and Pattern Recognition · Computer Science 2025-04-08 Ying Zhao

The application of supervised models to clinical screening tasks is challenging due to the need for annotated data for each considered pathology. Unsupervised Anomaly Detection (UAD) is an alternative approach that aims to identify any…

Image and Video Processing · Electrical Eng. & Systems 2025-01-24 Finn Behrendt , Debayan Bhattacharya , Robin Mieling , Lennart Maack , Julia Krüger , Roland Opfer , Alexander Schlaefer

In image anomaly detection, significant advancements have been made using un- and self-supervised methods with datasets containing only normal samples. However, these approaches often struggle with fine-grained anomalies. This paper…

Computer Vision and Pattern Recognition · Computer Science 2025-04-02 Huichuan Huang , Zhiqing Zhong , Guangyu Wei , Yonghao Wan , Wenlong Sun , Aimin Feng

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…

Computer Vision and Pattern Recognition · Computer Science 2023-04-11 Jian Shi , Ni Zhang

Anomaly detection in videos is a significant yet challenging problem. Previous approaches based on deep neural networks employ either reconstruction-based or prediction-based approaches. Nevertheless, existing reconstruction-based methods…

Computer Vision and Pattern Recognition · Computer Science 2023-01-31 Yizhou Wang , Can Qin , Yue Bai , Yi Xu , Xu Ma , Yun Fu

Anomaly awareness is an essential capability for safety-critical applications such as autonomous driving. While recent progress of robotics and computer vision has enabled anomaly detection for image classification, anomaly detection on…

Computer Vision and Pattern Recognition · Computer Science 2021-11-30 Guan-Rong Lu , Yueh-Cheng Liu , Tung-I Chen , Hung-Ting Su , Tsung-Han Wu , Winston H. Hsu

Despite the remarkable success, recent reconstruction-based anomaly detection (AD) methods via diffusion modeling still involve fine-grained noise-strength tuning and computationally expensive multi-step denoising, leading to a fundamental…

Computer Vision and Pattern Recognition · Computer Science 2026-03-13 Shunsuke Sakai , Xiangteng He , Chunzhi Gu , Leonid Sigal , Tatsuhito Hasegawa

Anomaly detection is a task that recognizes whether an input sample is included in the distribution of a target normal class or an anomaly class. Conventional generative adversarial network (GAN)-based methods utilize an entire image…

Computer Vision and Pattern Recognition · Computer Science 2021-04-01 Jou Won Song , Kyeongbo Kong , Ye In Park , Suk-Ju Kang

Unsupervised anomaly detection stands as an important problem in machine learning, with applications in financial fraud prevention, network security and medical diagnostics. Existing unsupervised anomaly detection algorithms rarely perform…

Machine Learning · Computer Science 2026-02-04 Pritam Kar , Rahul Bordoloi , Olaf Wolkenhauer , Saptarshi Bej

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…

Computer Vision and Pattern Recognition · Computer Science 2022-07-05 Vahid Reza Khazaie , Anthony Wong , Yalda Mohsenzadeh

Continuous efforts are being made to advance anomaly detection in various manufacturing processes to increase the productivity and safety of industrial sites. Deep learning replaced rule-based methods and recently emerged as a promising…

Machine Learning · Computer Science 2024-06-28 Kukjin Choi , Jihun Yi , Jisoo Mok , Sungroh Yoon