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Unsupervised anomaly detection plays a pivotal role in industrial defect inspection and medical image analysis, with most methods relying on the reconstruction framework. However, these methods may suffer from over-generalization, enabling…

Computer Vision and Pattern Recognition · Computer Science 2026-03-25 Wei Luo , Peng Xing , Yunkang Cao , Haiming Yao , Weiming Shen , Zechao Li

Anomaly detection has a wide range of applications and is especially important in industrial quality inspection. Currently, many top-performing anomaly-detection models rely on feature-embedding methods. However, these methods do not…

Computer Vision and Pattern Recognition · Computer Science 2023-07-07 Shiqi Deng , Zhiyu Sun , Ruiyan Zhuang , Jun Gong

Unsupervised visual anomaly detection is crucial for enhancing industrial production quality and efficiency. Among unsupervised methods, reconstruction approaches are popular due to their simplicity and effectiveness. The key aspect of…

Computer Vision and Pattern Recognition · Computer Science 2024-12-17 Wei Luo , Haiming Yao , Wenyong Yu , Zhengyong Li

Anomaly detection is nowadays increasingly used in industrial applications and processes. One of the main fields of the appliance is the visual inspection for surface anomaly detection, which aims to spot regions that deviate from…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Niccolò Ferrari , Michele Fraccaroli , Evelina Lamma

With the recent advances in deep neural networks, anomaly detection in multimedia has received much attention in the computer vision community. While reconstruction-based methods have recently shown great promise for anomaly detection, the…

Computer Vision and Pattern Recognition · Computer Science 2020-12-15 Chaoqin Huang , Fei Ye , Jinkun Cao , Maosen Li , Ya Zhang , Cewu Lu

Within (semi-)automated visual industrial inspection, learning-based approaches for assessing visual defects, including deep neural networks, enable the processing of otherwise small defect patterns in pixel size on high-resolution imagery.…

Computer Vision and Pattern Recognition · Computer Science 2023-11-08 André Luiz Buarque Vieira e Silva , Francisco Simões , Danny Kowerko , Tobias Schlosser , Felipe Battisti , Veronica Teichrieb

Recently, 3D anomaly detection, a crucial problem involving fine-grained geometry discrimination, is getting more attention. However, the lack of abundant real 3D anomaly data limits the scalability of current models. To enable scalable…

Computer Vision and Pattern Recognition · Computer Science 2023-12-01 Wenqiao Li , Xiaohao Xu , Yao Gu , Bozhong Zheng , Shenghua Gao , Yingna Wu

We address the problem of anomaly detection, that is, detecting anomalous events in a video sequence. Anomaly detection methods based on convolutional neural networks (CNNs) typically leverage proxy tasks, such as reconstructing input video…

Computer Vision and Pattern Recognition · Computer Science 2020-03-31 Hyunjong Park , Jongyoun Noh , Bumsub Ham

Visual anomaly detection plays a significant role in the development of industrial automatic product quality inspection. As a result of the utmost imbalance in the amount of normal and abnormal data, growing attention has been given to…

Computer Vision and Pattern Recognition · Computer Science 2023-01-16 Wei Luo , Haiming Yao , Wenyong Yu

Anomaly detection and localization are important problems in computer vision. Recently, Convolutional Neural Network (CNN) has been used for visual inspection. In particular, the scarcity of anomalous samples increases the difficulty of…

Computer Vision and Pattern Recognition · Computer Science 2022-03-10 Shinji Yamada , Kazuhiro Hotta

Reconstruction-based methods are widely explored in industrial visual anomaly detection. Such methods commonly require the model to well reconstruct the normal patterns but fail in the anomalies, and thus the anomalies can be detected by…

Computer Vision and Pattern Recognition · Computer Science 2025-03-17 Tongkun Liu , Bing Li , Zhuo Zhao , Xiao Du , Bingke Jiang , Leqi Geng

Anomaly detection and localization is an important vision problem, having multiple applications. Effective and generic semantic segmentation of anomalous regions on various different surfaces, where most anomalous regions inherently do not…

Computer Vision and Pattern Recognition · Computer Science 2021-12-03 Hrishikesh Sharma , Prakhar Pradhan , Balamuralidhar P

Recent efforts towards video anomaly detection (VAD) try to learn a deep autoencoder to describe normal event patterns with small reconstruction errors. The video inputs with large reconstruction errors are regarded as anomalies at the test…

Computer Vision and Pattern Recognition · Computer Science 2021-09-03 Yuandu Lai , Yahong Han , Yaowei Wang

Anomaly detection is critical for the secure and reliable operation of industrial control systems. As our reliance on such complex cyber-physical systems grows, it becomes paramount to have automated methods for detecting anomalies,…

Machine Learning · Computer Science 2024-05-10 Mayra Macas , Chunming Wu , Walter Fuertes

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

Within (semi-)automated visual inspection, learning-based approaches for assessing visual defects, including deep neural networks, enable the processing of otherwise small defect patterns in pixel size on high-resolution imagery. The…

Computer Vision and Pattern Recognition · Computer Science 2024-01-18 André Luiz B. Vieira e Silva , Francisco Simões , Danny Kowerko , Tobias Schlosser , Felipe Battisti , Veronica Teichrieb

Data augmentation methods are commonly integrated into the training of anomaly detection models. Previous approaches have primarily focused on replicating real-world anomalies or enhancing diversity, without considering that the standard of…

Artificial Intelligence · Computer Science 2024-12-30 Jiang Lin , Yaping Yan

Visual surface anomaly detection aims to detect local image regions that significantly deviate from normal appearance. Recent surface anomaly detection methods rely on generative models to accurately reconstruct the normal areas and to fail…

Computer Vision and Pattern Recognition · Computer Science 2021-09-28 Vitjan Zavrtanik , Matej Kristan , Danijel Skočaj

Industrial anomaly detection plays a crucial role in ensuring product quality control. Therefore, proposing an effective anomaly detection model is of great significance. While existing feature-reconstruction methods have demonstrated…

Computer Vision and Pattern Recognition · Computer Science 2026-03-25 Wei Luo , Haiming Yao , Wenyong Yu

Unsupervised reconstruction networks using self-attention transformers have achieved state-of-the-art performance for multi-class (unified) anomaly detection with a single model. However, these self-attention reconstruction models primarily…

Computer Vision and Pattern Recognition · Computer Science 2025-05-15 Bin-Bin Gao
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