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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

Industrial surface defect inspection for sample-wise quality control (QC) must simultaneously decide whether a given sample contains defects and localize those defects spatially. In real production lines, extreme foreground-background…

Computer Vision and Pattern Recognition · Computer Science 2025-10-16 Hang-Cheng Dong , Yibo Jiao , Fupeng Wei , Guodong Liu , Dong Ye , Bingguo Liu

We study the problem of few-shot out-of-distribution (OOD) detection, which aims to detect OOD samples from unseen categories during inference time with only a few labeled in-domain (ID) samples. Existing methods mainly focus on training…

Computer Vision and Pattern Recognition · Computer Science 2024-05-28 Xinyi Chen , Yaohui Li , Haoxing Chen

Open-set supervised anomaly detection (OSAD) - a recently emerging anomaly detection area - aims at utilizing a few samples of anomaly classes seen during training to detect unseen anomalies (i.e., samples from open-set anomaly classes),…

Computer Vision and Pattern Recognition · Computer Science 2024-03-19 Jiawen Zhu , Choubo Ding , Yu Tian , Guansong Pang

Multivariate time series anomaly detection (MTSAD) aims to accurately identify and localize complex abnormal patterns in the large-scale industrial control systems. While existing approaches excel in recognizing the distinct patterns under…

Machine Learning · Computer Science 2025-12-17 Xuechun Liu , Heli Sun , Xuecheng Wu , Ruichen Cao , Yunyun Shi , Dingkang Yang , Haoran Li

Previous industrial anomaly detection methods often struggle to handle the extensive diversity in training sets, particularly when they contain stylistically diverse and feature-rich samples, which we categorize as feature-rich anomaly…

Computer Vision and Pattern Recognition · Computer Science 2025-06-16 Fengjie Wang , Chengming Liu , Lei Shi , Pang Haibo

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

Anomaly detection (AD) is a fundamental task of critical importance across numerous domains. Current systems increasingly operate in rapidly evolving environments that generate diverse yet interconnected data modalities -- such as time…

Machine Learning · Computer Science 2025-12-02 Zhongyuan Wu , Jingyuan Wang , Zexuan Cheng , Yilong Zhou , Weizhi Wang , Juhua Pu , Chao Li , Changqing Ma

Image-based systems have gained popularity owing to their capacity to provide rich manufacturing status information, low implementation costs and high acquisition rates. However, the complexity of the image background and various anomaly…

Machine Learning · Statistics 2025-01-06 Hao Xu , Juan Du , Andi Wang , YingCong Chen

With the advent of vision-language models (e.g., CLIP) in zero- and few-shot settings, CLIP has been widely applied to zero-shot anomaly detection (ZSAD) in recent research, where the rare classes are essential and expected in many…

Computer Vision and Pattern Recognition · Computer Science 2025-07-16 Yuhu Bai , Jiangning Zhang , Yunkang Cao , Guangyuan Lu , Qingdong He , Xiangtai Li , Guanzhong Tian

Multimodal industrial surface defect detection (MISDD) aims to identify and locate defect in industrial products by fusing RGB and 3D modalities. This article focuses on modality-missing problems caused by uncertain sensors availability in…

Computer Vision and Pattern Recognition · Computer Science 2025-09-18 Shuai Jiang , Yunfeng Ma , Jingyu Zhou , Yuan Bian , Yaonan Wang , Min Liu

Visual anomaly detection plays a crucial role in not only manufacturing inspection to find defects of products during manufacturing processes, but also maintenance inspection to keep equipment in optimum working condition particularly…

Computer Vision and Pattern Recognition · Computer Science 2022-11-29 Tianpeng Bao , Jiadong Chen , Wei Li , Xiang Wang , Jingjing Fei , Liwei Wu , Rui Zhao , Ye Zheng

In industrial product quality assessment, it is essential to determine whether a product is defect-free and further analyze the severity of anomality. To this end, accurate defect segmentation on images of products provides an important…

Computer Vision and Pattern Recognition · Computer Science 2021-04-07 Dongyun Lin , Yanpeng Cao , Wenbing Zhu , Yiqun Li

This paper explores the problem of Generalist Anomaly Detection (GAD), aiming to train one single detection model that can generalize to detect anomalies in diverse datasets from different application domains without any further training on…

Computer Vision and Pattern Recognition · Computer Science 2024-03-19 Jiawen Zhu , Guansong Pang

Reliable anomaly detection in brain MRI remains challenging due to the scarcity of annotated abnormal cases and the frequent absence of key imaging modalities in real clinical workflows. Existing single-class or multi-class anomaly…

Computer Vision and Pattern Recognition · Computer Science 2025-12-25 Changwei Wu , Yifei Chen , Yuxin Du , Mingxuan Liu , Jinying Zong , Beining Wu , Jie Dong , Feiwei Qin , Yunkang Cao , Qiyuan Tian

Anomaly segmentation plays a pivotal role in identifying atypical objects in images, crucial for hazard detection in autonomous driving systems. While existing methods demonstrate noteworthy results on synthetic data, they often fail to…

Computer Vision and Pattern Recognition · Computer Science 2023-10-17 Ji Zhang , Xiao Wu , Zhi-Qi Cheng , Qi He , Wei Li

Unsupervised anomaly detection (UAD) has evolved from building specialized single-class models to unified multi-class models, yet existing multi-class models significantly underperform the most advanced one-for-one counterparts. Moreover,…

Computer Vision and Pattern Recognition · Computer Science 2025-10-27 Jia Guo , Shuai Lu , Lei Fan , Zelin Li , Donglin Di , Yang Song , Weihang Zhang , Wenbing Zhu , Hong Yan , Fang Chen , Huiqi Li , Hongen Liao

Accurate segmentation of nodules in both 2D breast ultrasound (BUS) and 3D automated breast ultrasound (ABUS) is crucial for clinical diagnosis and treatment planning. Therefore, developing an automated system for nodule segmentation can…

Computer Vision and Pattern Recognition · Computer Science 2025-11-04 Yuhao Huang , Ao Chang , Haoran Dou , Xing Tao , Xinrui Zhou , Yan Cao , Ruobing Huang , Alejandro F Frangi , Lingyun Bao , Xin Yang , Dong Ni

Anomalies are samples that significantly deviate from the rest of the data and their detection plays a major role in building machine learning models that can be reliably used in applications such as data-driven design and novelty…

Machine Learning · Statistics 2023-06-19 Amin Yousefpour , Mehdi Shishehbor , Zahra Zanjani Foumani , Ramin Bostanabad

Industrial anomaly classification (AC) is an indispensable task in industrial manufacturing, which guarantees quality and safety of various product. To address the scarcity of data in industrial scenarios, lots of few-shot anomaly detection…

Computer Vision and Pattern Recognition · Computer Science 2024-12-06 Zuo Zuo , Jiahao Dong , Yao Wu , Yanyun Qu , Zongze Wu