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Zero-shot anomaly detection (ZSAD) aims to detect anomalies without any target domain training samples, relying solely on external auxiliary data. Existing CLIP-based methods attempt to activate the model's ZSAD potential via handcrafted or…

Computer Vision and Pattern Recognition · Computer Science 2025-10-07 Ziteng Yang , Jingzehua Xu , Yanshu Li , Zepeng Li , Yeqiang Wang , Xinghui Li

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

This paper presents a novel method that leverages a visual-language model, CLIP, as a data source for zero-shot anomaly detection. Tremendous efforts have been put towards developing anomaly detectors due to their potential industrial…

Computer Vision and Pattern Recognition · Computer Science 2023-09-26 Masato Tamura

Recently, foundational models such as CLIP and SAM have shown promising performance for the task of Zero-Shot Anomaly Segmentation (ZSAS). However, either CLIP-based or SAM-based ZSAS methods still suffer from non-negligible key drawbacks:…

Computer Vision and Pattern Recognition · Computer Science 2024-01-30 Shengze Li , Jianjian Cao , Peng Ye , Yuhan Ding , Chongjun Tu , Tao Chen

Zero-shot anomaly detection (ZSAD) targets the identification of anomalies within images from arbitrary novel categories. This study introduces AdaCLIP for the ZSAD task, leveraging a pre-trained vision-language model (VLM), CLIP. AdaCLIP…

Computer Vision and Pattern Recognition · Computer Science 2025-02-17 Yunkang Cao , Jiangning Zhang , Luca Frittoli , Yuqi Cheng , Weiming Shen , Giacomo Boracchi

Visual anomaly detection has been widely used in industrial inspection and medical diagnosis. Existing methods typically demand substantial training samples, limiting their utility in zero-/few-shot scenarios. While recent efforts have…

Computer Vision and Pattern Recognition · Computer Science 2025-07-29 Qingqing Fang , Wenxi Lv , Qinliang Su

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

Visual anomaly classification and segmentation are vital for automating industrial quality inspection. The focus of prior research in the field has been on training custom models for each quality inspection task, which requires…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Jongheon Jeong , Yang Zou , Taewan Kim , Dongqing Zhang , Avinash Ravichandran , Onkar Dabeer

Zero-shot anomaly detection (ZSAD) identifies anomalies without needing training samples from the target dataset, essential for scenarios with privacy concerns or limited data. Vision-language models like CLIP show potential in ZSAD but…

Computer Vision and Pattern Recognition · Computer Science 2025-01-08 Chengyuan Li , Suyang Zhou , Jieping Kong , Lei Qi , Hui Xue

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 anomalies in unseen categories by leveraging CLIP's zero-shot capabilities to match text prompts with visual features. A key challenge in ZSAD is learning general prompts stably and…

Computer Vision and Pattern Recognition · Computer Science 2026-03-09 Donghyeong Kim , Chaewon Park , Suhwan Cho , Hyeonjeong Lim , Minseok Kang , Jungho Lee , Sangyoun Lee

Zero-shot anomaly detection (ZSAD) is crucial for detecting anomalous patterns in target datasets without using training samples, specifically in scenarios where there are distributional differences between the target domain and training…

Computer Vision and Pattern Recognition · Computer Science 2024-12-10 Jiyul Ham , Yonggon Jung , Jun-Geol Baek

Universal visual anomaly detection aims to identify anomalies from novel or unseen vision domains without additional fine-tuning, which is critical in open scenarios. Recent studies have demonstrated that pre-trained vision-language models…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Bin-Bin Gao , Yue Zhou , Jiangtao Yan , Yuezhi Cai , Weixi Zhang , Meng Wang , Jun Liu , Yong Liu , Lei Wang , Chengjie Wang

Large-scale contrastive vision-language pre-training has shown significant progress in visual representation learning. Unlike traditional visual systems trained by a fixed set of discrete labels, a new paradigm was introduced in…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Peng Gao , Shijie Geng , Renrui Zhang , Teli Ma , Rongyao Fang , Yongfeng Zhang , Hongsheng Li , Yu Qiao

Contrastive Language-Image Pre-training (CLIP) models have shown promising performance on zero-shot visual recognition tasks by learning visual representations under natural language supervision. Recent studies attempt the use of CLIP to…

Computer Vision and Pattern Recognition · Computer Science 2024-02-28 Hanqiu Deng , Zhaoxiang Zhang , Jinan Bao , Xingyu Li

Vision-Language Models (VLMs), particularly CLIP, have revolutionized anomaly detection by enabling zero-shot and few-shot defect identification without extensive labeled datasets. By learning aligned representations of images and text,…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Mohit Kakda , Mirudula Shri Muthukumaran , Uttapreksha Patel , Lawrence Swaminathan Xavier Prince

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

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

Pre-trained vision-language models, e.g., CLIP, have been successfully applied to zero-shot semantic segmentation. Existing CLIP-based approaches primarily utilize visual features from the last layer to align with text embeddings, while…

Computer Vision and Pattern Recognition · Computer Science 2024-06-07 Yunheng Li , ZhongYu Li , Quansheng Zeng , Qibin Hou , Ming-Ming Cheng

Enhancing the alignment between text and image features in the CLIP model is a critical challenge in zero-shot industrial anomaly detection tasks. Recent studies predominantly utilize specific category prompts during pretraining, which can…

Computer Vision and Pattern Recognition · Computer Science 2025-07-08 Yanning Hou , Yanran Ruan , Junfa Li , Shanshan Wang , Jianfeng Qiu , Ke Xu
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