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Zero-Shot Anomaly Detection (ZSAD) seeks to identify anomalies from arbitrary novel categories, offering a scalable and annotation-efficient solution. Traditionally, most ZSAD works have been based on the CLIP model, which performs anomaly…

Computer Vision and Pattern Recognition · Computer Science 2025-09-19 Jingyi Yuan , Jianxiong Ye , Wenkang Chen , Chenqiang Gao

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

Recently, zero-shot anomaly detection (ZSAD) has emerged as a pivotal paradigm for industrial inspection and medical diagnostics, detecting defects in novel objects without requiring any target-dataset samples during training. Existing…

Computer Vision and Pattern Recognition · Computer Science 2025-08-19 Jingyi Yuan , Chenqiang Gao , Pengyu Jie , Xuan Xia , Shangri Huang , Wanquan Liu

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

Zero-Shot Anomaly Detection (ZSAD) aims to detect anomalies in unseen domains without target-domain adaptation. Recent CLIP-based methods have shown promising performance by leveraging prompt learning and visual-text alignment. However,…

Computer Vision and Pattern Recognition · Computer Science 2026-05-28 Xinyu Zhao , Qingyun Sun , Jiayi Luo , Jianxin Li

Zero-Shot image Anomaly Detection (ZSAD) aims to detect and localise anomalies without access to any normal training samples of the target data. While recent ZSAD approaches leverage additional modalities such as language to generate…

Computer Vision and Pattern Recognition · Computer Science 2026-01-14 Samet Hicsonmez , Abd El Rahman Shabayek , Djamila Aouada

Vision-language models have recently shown strong generalization in zero-shot anomaly detection (ZSAD), enabling the detection of unseen anomalies without task-specific supervision. However, existing approaches typically rely on fixed…

Computer Vision and Pattern Recognition · Computer Science 2026-03-19 Peng Chen , Chao Huang

Zero-shot anomaly detection aims to identify defects in unseen categories without target-specific training. Existing methods usually apply the same feature transformation to all samples, treating normal and anomalous data uniformly despite…

Computer Vision and Pattern Recognition · Computer Science 2026-05-13 Muhammad Aqeel , Maham Nazir , Uzair Khan , Marco Cristani , Francesco Setti

Zero-shot anomaly detection (ZSAD) requires detection models trained using auxiliary data to detect anomalies without any training sample in a target dataset. It is a crucial task when training data is not accessible due to various…

Computer Vision and Pattern Recognition · Computer Science 2026-01-05 Qihang Zhou , Guansong Pang , Yu Tian , Shibo He , Jiming Chen

Zero-shot anomaly detection (ZSAD) enables anomaly detection without normal samples from target categories, addressing scenarios where task-specific training data is unavailable. However, existing ZSAD methods either neglect adaptation of…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Kiyoon Jeong , Jaehyuk Heo , Junyeong Son , Pilsung Kang

Anomaly detection identifies departures from expected behavior in safety-critical settings. When target-domain normal data are unavailable, zero-shot anomaly detection (ZSAD) leverages vision-language models (VLMs). However, CLIP's coarse…

Computer Vision and Pattern Recognition · Computer Science 2026-02-26 Alireza Salehi , Ehsan Karami , Sepehr Noey , Sahand Noey , Makoto Yamada , Reshad Hosseini , Mohammad Sabokrou

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

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

Zero-shot anomaly detection (ZSAD) methods entail detecting anomalies directly without access to any known normal or abnormal samples within the target item categories. Existing approaches typically rely on the robust generalization…

Computer Vision and Pattern Recognition · Computer Science 2026-03-03 Zhaopeng Gu , Bingke Zhu , Guibo Zhu , Yingying Chen , Hao Li , Ming Tang , Jinqiao Wang

Detecting visual anomalies in industrial inspection often requires training with only a few normal images per category. Recent few-shot methods achieve strong results employing foundation-model features, but typically rely on memory banks,…

Computer Vision and Pattern Recognition · Computer Science 2026-05-14 Camile Lendering , Erkut Akdag , Egor Bondarev

Industrial image anomaly detection (IAD) is a pivotal topic with huge value. Due to anomaly's nature, real anomalies in a specific modern industrial domain (i.e. domain-specific anomalies) are usually too rare to collect, which severely…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Siqi Wang , Yuanze Hu , Xinwang Liu , Siwei Wang , Guangpu Wang , Chuanfu Xu , Jie Liu , Ping Chen

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

Zero-Shot Anomaly Detection (ZSAD) is an emerging AD paradigm. Unlike the traditional unsupervised AD setting that requires a large number of normal samples to train a model, ZSAD is more practical for handling data-restricted real-world…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Jiacong Xu , Shao-Yuan Lo , Bardia Safaei , Vishal M. Patel , Isht Dwivedi

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

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
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