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3D anomaly detection (AD) is a crucial task in computer vision, aiming to identify anomalous points or regions from point cloud data. However, existing methods may encounter challenges when handling point clouds with changes in orientation…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Hanzhe Liang , Jie Zhou , Can Gao , Bingyang Guo , Jinbao Wang , Linlin Shen

Anomaly detection is an emerging approach in digital pathology for its ability to efficiently and effectively utilize data for disease diagnosis. While supervised learning approaches deliver high accuracy, they rely on extensively annotated…

Image and Video Processing · Electrical Eng. & Systems 2025-08-22 Jiamu Wang , Keunho Byeon , Jinsol Song , Anh Nguyen , Sangjeong Ahn , Sung Hak Lee , Jin Tae Kwak

Deepfake detectors face growing challenges in generalization as new image synthesis techniques emerge. In particular, deepfakes generated by diffusion models are highly photorealistic and often evade detectors trained on GAN-based…

Computer Vision and Pattern Recognition · Computer Science 2026-04-17 Hongyuan Qi , Wenjin Hou , Hehe Fan , Jun Xiao

Deep generative models have emerged as promising tools for detecting arbitrary anomalies in data, dispensing with the necessity for manual labelling. Recently, autoregressive transformers have achieved state-of-the-art performance for…

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

Deploying video anomaly detection in practice is hampered by the scarcity and collection cost of real abnormal footage. We address this by training without any real abnormal videos while evaluating under the standard weakly supervised…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Satoshi Hashimoto , Hitoshi Nishimura , Yanan Wang , Mori Kurokawa

Graph anomaly detection (GAD) is crucial in applications like fraud detection and cybersecurity. Despite recent advancements using graph neural networks (GNNs), two major challenges persist. At the model level, most methods adopt a…

Machine Learning · Computer Science 2026-02-06 Chunyu Wei , Siyuan He , Yu Wang , Yueguo Chen , Yunhai Wang , Bing Bai , Yidong Zhang , Yong Xie , Shunming Zhang , Fei Wang

The rapid advancement of generative image models has transformed digital media to the point where AI generated images can no longer be reliably distinguished from authentic photographs by human observers or many conventional detection…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Mohd Ruhul Ameen , Akif Islam

Industrial anomaly detection (AD) plays a significant role in manufacturing where a long-standing challenge is data scarcity. A growing body of works have emerged to address insufficient anomaly data via anomaly generation. However, these…

Computer Vision and Pattern Recognition · Computer Science 2025-08-18 Zuo Zuo , Jiahao Dong , Yanyun Qu , Zongze Wu

Visual anomaly inspection is critical in manufacturing, yet hampered by the scarcity of real anomaly samples for training robust detectors. Synthetic data generation presents a viable strategy for data augmentation; however, current methods…

Computer Vision and Pattern Recognition · Computer Science 2025-09-17 Linchun Wu , Qin Zou , Xianbiao Qi , Bo Du , Zhongyuan Wang , Qingquan Li

Current anomaly detection methods primarily focus on low-resolution scenarios. For high-resolution images, conventional downsampling often results in missed detections of subtle anomalous regions due to the loss of fine-grained…

Computer Vision and Pattern Recognition · Computer Science 2025-08-19 Ximiao Zhang , Min Xu , Xiuzhuang Zhou

Graph anomaly detection (GAD) aims to identify anomalous graphs that significantly deviate from other ones, which has raised growing attention due to the broad existence and complexity of graph-structured data in many real-world scenarios.…

Machine Learning · Computer Science 2024-02-21 Jinyu Cai , Yunhe Zhang , Zhoumin Lu , Wenzhong Guo , See-kiong Ng

Heterogeneous dynamics commonly emerges in anomalous diffusion with intermittent transitions of diffusion states but proves challenging to identify using conventional statistical methods. To effectively capture these transient changes of…

Biological Physics · Physics 2024-01-24 Xiang Qu , Yi Hu , Wenjie Cai , Yang Xu , Hu Ke , Guolong Zhu , Zihan Huang

Unsupervised image Anomaly Detection (UAD) aims to learn robust and discriminative representations of normal samples. While separate solutions per class endow expensive computation and limited generalizability, this paper focuses on…

Computer Vision and Pattern Recognition · Computer Science 2023-10-24 Ruiying Lu , YuJie Wu , Long Tian , Dongsheng Wang , Bo Chen , Xiyang Liu , Ruimin Hu

Hyperspectral anomaly detection (HAD), a crucial approach for many civilian and military applications, seeks to identify pixels with spectral signatures that are anomalous relative to a preponderance of background signatures. Significant…

Computer Vision and Pattern Recognition · Computer Science 2025-10-02 Abu Hasnat Mohammad Rubaiyat , Jordan Vincent , Colin Olson

The introduction of diffusion models in anomaly detection has paved the way for more effective and accurate image reconstruction in pathologies. However, the current limitations in controlling noise granularity hinder diffusion models'…

Computer Vision and Pattern Recognition · Computer Science 2023-06-01 Cosmin I. Bercea , Michael Neumayr , Daniel Rueckert , Julia A. Schnabel

Domain generalization (DG) for object detection aims to enhance detectors' performance in unseen scenarios. This task remains challenging due to complex variations in real-world applications. Recently, diffusion models have demonstrated…

Computer Vision and Pattern Recognition · Computer Science 2025-06-05 Boyong He , Yuxiang Ji , Qianwen Ye , Zhuoyue Tan , Liaoni Wu

Graph anomaly detection (GAD) is a challenging binary classification problem due to its different structural distribution between anomalies and normal nodes -- abnormal nodes are a minority, therefore holding high heterophily and low…

Machine Learning · Computer Science 2024-01-26 Yuan Gao , Xiang Wang , Xiangnan He , Zhenguang Liu , Huamin Feng , Yongdong Zhang

Recent studies emphasize the crucial role of data augmentation in enhancing the performance of object detection models. However,existing methodologies often struggle to effectively harmonize dataset diversity with semantic coordination.To…

Computer Vision and Pattern Recognition · Computer Science 2024-08-07 Sen Nie , Zhuo Wang , Xinxin Wang , Kun He

We introduce Neural Contextual Anomaly Detection (NCAD), a framework for anomaly detection on time series that scales seamlessly from the unsupervised to supervised setting, and is applicable to both univariate and multivariate time series.…

Machine Learning · Computer Science 2021-07-19 Chris U. Carmona , François-Xavier Aubet , Valentin Flunkert , Jan Gasthaus
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