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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…

计算机视觉与模式识别 · 计算机科学 2026-02-03 Chaoran Xu , Chengkan Lv , Qiyu Chen , Feng Zhang , Zhengtao Zhang

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…

计算机视觉与模式识别 · 计算机科学 2026-03-10 Yanning Hou , Peiyuan Li , Zirui Liu , Yitong Wang , Yanran Ruan , Jianfeng Qiu , Ke Xu

Zero-shot anomaly detection (ZSAD) offers potential for identifying anomalies in medical imaging without task-specific training. In this paper, we evaluate CLIP-based models, originally developed for industrial tasks, on brain tumor…

计算机视觉与模式识别 · 计算机科学 2024-11-15 Aldo Marzullo , Marta Bianca Maria Ranzini

Zero-shot (ZS) 3D anomaly detection is a crucial yet unexplored field that addresses scenarios where target 3D training samples are unavailable due to practical concerns like privacy protection. This paper introduces PointAD, a novel…

计算机视觉与模式识别 · 计算机科学 2024-12-24 Qihang Zhou , Jiangtao Yan , Shibo He , Wenchao Meng , Jiming Chen

Zero-shot anomaly detection (ZSAD) enables identifying and localizing defects in unseen categories by relying solely on generalizable features rather than requiring any labeled examples of anomalies. However, existing ZSAD methods, whether…

计算机视觉与模式识别 · 计算机科学 2025-11-26 Zihan Wang , Samira Ebrahimi Kahou , Narges Armanfard

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…

计算机视觉与模式识别 · 计算机科学 2026-01-14 Samet Hicsonmez , Abd El Rahman Shabayek , Djamila Aouada

Purpose. Brain Magnetic Resonance Images (MRIs) are essential for the diagnosis of neurological diseases. Recently, deep learning methods for unsupervised anomaly detection (UAD) have been proposed for the analysis of brain MRI. These…

图像与视频处理 · 电气工程与系统科学 2021-09-15 Marcel Bengs , Finn Behrendt , Julia Krüger , Roland Opfer , Alexander Schlaefer

Automatic segmentation of brain abnormalities is challenging, as they vary considerably from one pathology to another. Current methods are supervised and require numerous annotated images for each pathology, a strenuous task. To tackle…

图像与视频处理 · 电气工程与系统科学 2021-01-27 Benjamin Lambert , Maxime Louis , Senan Doyle , Florence Forbes , Michel Dojat , Alan Tucholka

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,…

计算机视觉与模式识别 · 计算机科学 2026-05-14 Camile Lendering , Erkut Akdag , Egor Bondarev

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…

计算机视觉与模式识别 · 计算机科学 2025-03-18 Jiacong Xu , Shao-Yuan Lo , Bardia Safaei , Vishal M. Patel , Isht Dwivedi

Anomaly detection (AD) is the identification of data samples that do not fit a learned data distribution. As such, AD systems can help physicians to determine the presence, severity, and extension of a pathology. Deep generative models,…

图像与视频处理 · 电气工程与系统科学 2021-04-12 Jaime Simarro , Ezequiel de la Rosa , Thijs Vande Vyvere , David Robben , Diana M. Sima

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…

计算机视觉与模式识别 · 计算机科学 2026-04-21 Qiuhui Chen , Jiaxiang Song , Shuai Tan , Weimin Zhong

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…

计算机视觉与模式识别 · 计算机科学 2025-09-15 Gang Li , Tianjiao Chen , Mingle Zhou , Min Li , Delong Han , Jin Wan

3D object detection is fundamental for spatial understanding. Real-world environments demand models capable of recognizing diverse, previously unseen objects, which remains a major limitation of closed-set methods. Existing open-vocabulary…

计算机视觉与模式识别 · 计算机科学 2025-11-26 Andrey Lemeshko , Bulat Gabdullin , Nikita Drozdov , Anton Konushin , Danila Rukhovich , Maksim Kolodiazhnyi

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…

计算机视觉与模式识别 · 计算机科学 2026-04-02 Huilin Deng , Hongchen Luo , Wei Zhai , Yang Cao , Yu Kang

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…

计算机视觉与模式识别 · 计算机科学 2026-03-19 Peng Chen , Chao Huang

Zero-shot anomaly classification (AC) and segmentation (AS) methods aim to identify and outline defects without using any labeled samples. In this paper, we reveal a key property that is overlooked by existing methods: normal image patches…

计算机视觉与模式识别 · 计算机科学 2026-04-28 Xurui Li , Feng Xue , Yu Zhou

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…

计算机视觉与模式识别 · 计算机科学 2025-11-25 Yuheng Shao , Lizhang Wang , Changhao Li , Peixian Chen , Qinyuan Liu

Zero-shot industrial anomaly detection (ZSAD) methods typically yield coarse anomaly maps as vision transformers (ViTs) extract patch-level features only. To solve this, recent solutions attempt to predict finer anomalies using features…

计算机视觉与模式识别 · 计算机科学 2025-12-01 Dayou Huang , Feng Xue , Xurui Li , Yu Zhou

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…

计算机视觉与模式识别 · 计算机科学 2026-05-08 Letian Bai , Xuanming Cao , Juan Du , Chengyu Tao
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