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Most existing anomaly detection (AD) methods require a dedicated model for each category. Such a paradigm, despite its promising results, is computationally expensive and inefficient, thereby failing to meet the requirements for realworld…

Computer Vision and Pattern Recognition · Computer Science 2024-10-10 Chaoqin Huang , Haoyan Guan , Aofan Jiang , Ya Zhang , Michael Spratling , Xinchao Wang , Yanfeng Wang

Few-shot anomaly detection (FSAD) has emerged as a crucial yet challenging task in industrial inspection, where normal distribution modeling must be accomplished with only a few normal images. While existing approaches typically employ…

Computer Vision and Pattern Recognition · Computer Science 2025-05-09 Qishan Wang , Jia Guo , Shuyong Gao , Haofen Wang , Li Xiong , Junjie Hu , Hanqi Guo , Wenqiang Zhang

This paper considers few-shot anomaly detection (FSAD), a practical yet under-studied setting for anomaly detection (AD), where only a limited number of normal images are provided for each category at training. So far, existing FSAD studies…

Computer Vision and Pattern Recognition · Computer Science 2022-07-18 Chaoqin Huang , Haoyan Guan , Aofan Jiang , Ya Zhang , Michael Spratling , Yan-Feng Wang

Few-shot anomaly detection (FSAD) has made significant strides, yet existing methods still face critical challenges: (i) dependence on task- or dataset-specific training/fine-tuning, (ii) reliance on language supervision or carefully…

Computer Vision and Pattern Recognition · Computer Science 2026-05-12 Guohuan Xie , Xin He , Dingying Fan , Siqi Li , Yun Liu

Few-shot anomaly detection (FSAD) methods identify anomalous regions with few known normal samples. Most existing methods rely on the generalization ability of pre-trained vision-language models (VLMs) to recognize potentially anomalous…

Computer Vision and Pattern Recognition · Computer Science 2025-10-31 Yuanting Fan , Jun Liu , Xiaochen Chen , Bin-Bin Gao , Jian Li , Yong Liu , Jinlong Peng , Chengjie Wang

Graph anomaly detection plays a crucial role in identifying exceptional instances in graph data that deviate significantly from the majority. It has gained substantial attention in various domains of information security, including network…

Machine Learning · Computer Science 2023-11-20 Fan Xu , Nan Wang , Xuezhi Wen , Meiqi Gao , Chaoqun Guo , Xibin Zhao

Graph-level anomaly detection aims to identify anomalous graphs or subgraphs within graph datasets, playing a vital role in various fields such as fraud detection, review classification, and biochemistry. While Graph Neural Networks (GNNs)…

Machine Learning · Computer Science 2025-10-10 Liting Li , Yumeng Wang , Yueheng Sun

Few-Shot Industrial Visual Anomaly Detection (FS-IVAD) comprises a critical task in modern manufacturing settings, where automated product inspection systems need to identify rare defects using only a handful of normal/defect-free training…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Aggelos Psiris , Yannis Panagakis , Maria Vakalopoulou , Georgios Th. Papadopoulos

Few-shot graph anomaly detection (GAD) has recently garnered increasing attention, which aims to discern anomalous patterns among abundant unlabeled test nodes under the guidance of a limited number of labeled training nodes. Existing…

Machine Learning · Computer Science 2024-10-14 Jiazhen Chen , Sichao Fu , Zhibin Zhang , Zheng Ma , Mingbin Feng , Tony S. Wirjanto , Qinmu Peng

Graph anomaly detection (GAD) is critical for identifying abnormal nodes in graph-structured data from diverse domains, including cybersecurity and social networks. The existing GAD methods often focus on the learning paradigms of…

Machine Learning · Computer Science 2026-02-24 Yixin Liu , Shiyuan Li , Yu Zheng , Qingfeng Chen , Chengqi Zhang , Philip S. Yu , Shirui Pan

Existing approaches towards anomaly detection~(AD) often rely on a substantial amount of anomaly-free data to train representation and density models. However, large anomaly-free datasets may not always be available before the inference…

Computer Vision and Pattern Recognition · Computer Science 2024-03-01 Jingyi Liao , Xun Xu , Manh Cuong Nguyen , Adam Goodge , Chuan Sheng Foo

Few-shot anomaly detection (FSAD) denotes the identification of anomalies within a target category with a limited number of normal samples. Existing FSAD methods largely rely on pre-trained feature representations to detect anomalies, but…

Computer Vision and Pattern Recognition · Computer Science 2025-12-18 Yuxin Jiang , Yunkang Cao , Weiming Shen

The vision-language model has brought great improvement to few-shot industrial anomaly detection, which usually needs to design of hundreds of prompts through prompt engineering. For automated scenarios, we first use conventional prompt…

Computer Vision and Pattern Recognition · Computer Science 2024-07-17 Xiaofan Li , Zhizhong Zhang , Xin Tan , Chengwei Chen , Yanyun Qu , Yuan Xie , Lizhuang Ma

Few-shot object detection (FSOD) aims to detect never-seen objects using few examples. This field sees recent improvement owing to the meta-learning techniques by learning how to match between the query image and few-shot class examples,…

Computer Vision and Pattern Recognition · Computer Science 2022-05-10 Guangxing Han , Yicheng He , Shiyuan Huang , Jiawei Ma , Shih-Fu Chang

Graph anomaly detection (GAD) aims to identify abnormal nodes that differ from the majority of the nodes in a graph, which has been attracting significant attention in recent years. Existing generalist graph models have achieved remarkable…

Machine Learning · Computer Science 2025-06-03 Hezhe Qiao , Chaoxi Niu , Ling Chen , Guansong Pang

Current zero-shot anomaly detection (ZSAD) methods show remarkable success in prompting large pre-trained vision-language models to detect anomalies in a target dataset without using any dataset-specific training or demonstration. However,…

Computer Vision and Pattern Recognition · Computer Science 2025-10-06 Jiawen Zhu , Yew-Soon Ong , Chunhua Shen , Guansong Pang

Graph anomaly detection has long been an important problem in various domains pertaining to information security such as financial fraud, social spam and network intrusion. The majority of existing methods are performed in an unsupervised…

Machine Learning · Computer Science 2024-08-27 Xiongxiao Xu , Kaize Ding , Canyu Chen , Kai Shu

Detecting anomaly patterns from images is a crucial artificial intelligence technique in industrial applications. Recent research in this domain has emphasized the necessity of a large volume of training data, overlooking the practical…

Computer Vision and Pattern Recognition · Computer Science 2025-07-30 Shenxing Wei , Xing Wei , Zhiheng Ma , Songlin Dong , Shaochen Zhang , Yihong Gong

Few-normal shot anomaly detection (FNSAD) aims to detect abnormal regions in images using only a few normal training samples, making the task highly challenging due to limited supervision and the diversity of potential defects. Recent…

Computer Vision and Pattern Recognition · Computer Science 2026-01-23 Morteza Poudineh , Marc Lalonde

Graph anomaly detection (GAD), which aims to identify nodes in a graph that significantly deviate from normal patterns, plays a crucial role in broad application domains. However, existing GAD methods are one-model-for-one-dataset…

Machine Learning · Computer Science 2025-06-10 Chaoxi Niu , Hezhe Qiao , Changlu Chen , Ling Chen , Guansong Pang
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