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This paper studies zero-shot anomaly classification (AC) and segmentation (AS) in industrial vision. We reveal that the abundant normal and abnormal cues implicit in unlabeled test images can be exploited for anomaly determination, which is…

Computer Vision and Pattern Recognition · Computer Science 2024-01-31 Xurui Li , Ziming Huang , Feng Xue , Yu Zhou

Zero-shot anomaly classification and segmentation (AC/AS) aim to detect anomalous samples and regions without any training data, a capability increasingly crucial in industrial inspection and medical imaging. This dissertation aims to…

Computer Vision and Pattern Recognition · Computer Science 2025-12-03 Tai Le-Gia

Zero-shot 3D (ZS-3D) anomaly detection aims to identify defects in 3D objects without relying on labeled training data, making it especially valuable in scenarios constrained by data scarcity, privacy, or high annotation cost. However, most…

Computer Vision and Pattern Recognition · Computer Science 2025-09-15 Gang Li , Tianjiao Chen , Mingle Zhou , Min Li , Delong Han , Jin Wan

Precise optical inspection in industrial applications is crucial for minimizing scrap rates and reducing the associated costs. Besides merely detecting if a product is anomalous or not, it is crucial to know the distinct type of defect,…

Computer Vision and Pattern Recognition · Computer Science 2025-08-07 Ylli Sadikaj , Hongkuan Zhou , Lavdim Halilaj , Stefan Schmid , Steffen Staab , Claudia Plant

Zero-shot 3D anomaly detection aims to identify anomalies without access to training data from target categories. However, existing methods mainly rely on projecting 3D observations into multi-view representations that primarily capture…

Computer Vision and Pattern Recognition · Computer Science 2026-05-08 Letian Bai , Xuanming Cao , Juan Du , Chengyu Tao

Zero-shot image anomaly classification (AC) and segmentation (AS) are vital for industrial quality control, detecting defects without prior training data. Existing representation-based methods compare patch features with nearest neighbors…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 Tai Le-Gia , Ahn Jaehyun

Industrial quality inspection plays a critical role in modern manufacturing by identifying defective products during production. While single-modality approaches using either 3D point clouds or 2D RGB images suffer from information…

Image and Video Processing · Electrical Eng. & Systems 2025-07-30 Chengyu Tao , Xuanming Cao , Juan Du

This paper considers zero-shot Anomaly Detection (AD), performing AD without reference images of the test objects. We propose a framework called CLIP-AD to leverage the zero-shot capabilities of the large vision-language model CLIP.…

Computer Vision and Pattern Recognition · Computer Science 2024-03-05 Xuhai Chen , Jiangning Zhang , Guanzhong Tian , Haoyang He , Wuhao Zhang , Yabiao Wang , Chengjie Wang , Yong Liu

Recently, multi-class anomaly classification has garnered increasing attention. Previous methods directly cluster anomalies but often struggle due to the lack of anomaly-prior knowledge. Acquiring this knowledge faces two issues: the…

Computer Vision and Pattern Recognition · Computer Science 2025-03-28 Ziming Huang , Xurui Li , Haotian Liu , Feng Xue , Yuzhe Wang , Yu Zhou

Zero-shot anomaly detection (ZSAD) recognizes and localizes anomalies in previously unseen objects by establishing feature mapping between textual prompts and inspection images, demonstrating excellent research value in flexible industrial…

Computer Vision and Pattern Recognition · Computer Science 2026-04-02 Huilin Deng , Hongchen Luo , Wei Zhai , Yang Cao , Yu Kang

The paper explores the industrial multimodal Anomaly Detection (AD) task, which exploits point clouds and RGB images to localize anomalies. We introduce a novel light and fast framework that learns to map features from one modality to the…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Alex Costanzino , Pierluigi Zama Ramirez , Giuseppe Lisanti , Luigi Di Stefano

Zero-shot anomaly detection (ZSAD) requires detecting and localizing anomalies without access to target-class anomaly samples. Mainstream methods rely on vision-language models (VLMs) such as CLIP: they build hand-crafted or learned prompt…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Yanning Hou , Peiyuan Li , Zirui Liu , Yitong Wang , Yanran Ruan , Jianfeng Qiu , Ke Xu

Zero-shot anomaly detection (ZSAD) often leverages pretrained vision or vision-language models, but many existing methods use prompt learning or complex modeling to fit the data distribution, resulting in high training or inference cost and…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Chaoran Xu , Chengkan Lv , Qiyu Chen , Feng Zhang , Zhengtao Zhang

Visual anomaly detection (AD) for industrial inspection is a highly relevant task in modern production environments. The problem becomes particularly challenging when training and deployment data differ due to changes in acquisition…

Computer Vision and Pattern Recognition · Computer Science 2026-05-15 Lukas Roming , Felix Lehnerer , Jonas V. Funk , Andreas Michel , Georg Maier , Thomas Längle , Jürgen Beyerer

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

Deep learning-based industrial anomaly detectors often behave as black boxes, making it hard to justify decisions with physically meaningful defect evidence. We propose ZSG-IAD, a multimodal vision-language framework for zero-shot grounded…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Qiuhui Chen , Jiaxiang Song , Shuai Tan , Weimin Zhong

Multimodal industrial anomaly detection benefits from integrating RGB appearance with 3D surface geometry, yet existing \emph{unsupervised} approaches commonly rely on memory banks, teacher-student architectures, or fragile fusion schemes,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-05 Radia Daci , Vito Renò , Cosimo Patruno , Angelo Cardellicchio , Abdelmalik Taleb-Ahmed , Marco Leo , Cosimo Distante

Zero-Shot Anomaly Detection (ZSAD) aims to identify and localize anomalous regions in images of unseen object classes. While recent methods based on vision-language models like CLIP show promise, their performance is constrained by existing…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Yuheng Shao , Lizhang Wang , Changhao Li , Peixian Chen , Qinyuan Liu

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

Automated visual inspection in medical-device manufacturing faces unique challenges, including extremely low defect rates, limited annotated data, hardware restrictions on production lines, and the need for validated, explainable…

Computer Vision and Pattern Recognition · Computer Science 2025-11-14 Julio Zanon Diaz , Georgios Siogkas , Peter Corcoran
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