English
Related papers

Related papers: UniMMAD: Unified Multi-Modal and Multi-Class Anoma…

200 papers

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

This work studies a challenging and practical issue known as multi-class unsupervised anomaly detection (MUAD). This problem requires only normal images for training while simultaneously testing both normal and anomaly images across…

Computer Vision and Pattern Recognition · Computer Science 2024-08-13 Jiangning Zhang , Xuhai Chen , Yabiao Wang , Chengjie Wang , Yong Liu , Xiangtai Li , Ming-Hsuan Yang , Dacheng Tao

Industrial anomaly detection based on RGB-3D multimodal data has emerged as a mainstream paradigm for intelligent quality inspection. However, existing unsupervised methods suffer from two critical limitations: ambiguous cross-modal…

Computer Vision and Pattern Recognition · Computer Science 2026-04-28 Zewen Li , Shuo Ye , Zitong Yu , Weicheng Xie , Linlin Shen

In the context of high usability in single-class anomaly detection models, recent academic research has become concerned about the more complex multi-class anomaly detection. Although several papers have designed unified models for this…

Computer Vision and Pattern Recognition · Computer Science 2024-03-22 Xi Jiang , Ying Chen , Qiang Nie , Jianlin Liu , Yong Liu , Chengjie Wang , Feng Zheng

Anomaly detection holds considerable industrial significance, especially in scenarios with limited anomalous data. Currently, reconstruction-based and unsupervised representation-based approaches are the primary focus. However, unsupervised…

Computer Vision and Pattern Recognition · Computer Science 2025-12-29 Xiao Jin , Liang Diao , Qixin Xiao , Yifan Hu , Ziqi Zhang , Yuchen Liu , Haisong Gu

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

We present ModMap, a natively multiview and multimodal framework for 3D anomaly detection and segmentation. Unlike existing methods that process views independently, our method draws inspiration from the crossmodal feature mapping paradigm…

Computer Vision and Pattern Recognition · Computer Science 2026-04-03 Alex Costanzino , Pierluigi Zama Ramirez , Giuseppe Lisanti , Luigi Di Stefano

Most advanced unsupervised anomaly detection (UAD) methods rely on modeling feature representations of frozen encoder networks pre-trained on large-scale datasets, e.g. ImageNet. However, the features extracted from the encoders that are…

Computer Vision and Pattern Recognition · Computer Science 2023-10-25 Jia Guo , Shuai Lu , Lize Jia , Weihang Zhang , Huiqi Li

In this paper, we introduce a novel task termed unified anomaly detection and classification, which aims to simultaneously detect anomalous regions in images and identify their specific categories. Existing methods typically treat anomaly…

Computer Vision and Pattern Recognition · Computer Science 2026-02-04 Ximiao Zhang , Min Xu , Zheng Zhang , Junlin Hu , Xiuzhuang Zhou

Medical multi-modal pre-training has revealed promise in computer-aided diagnosis by leveraging large-scale unlabeled datasets. However, existing methods based on masked autoencoders mainly rely on data-level reconstruction tasks, but lack…

Computer Vision and Pattern Recognition · Computer Science 2024-04-10 Yupei Zhang , Li Pan , Qiushi Yang , Tan Li , Zhen Chen

Recent advancements in anomaly detection have shifted focus towards Multi-class Unified Anomaly Detection (MUAD), offering more scalable and practical alternatives compared to traditional one-class-one-model approaches. However, existing…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Hossein Kashiani , Niloufar Alipour Talemi , Fatemeh Afghah

Time series anomaly detection (TSAD) has long been a hot research topic in data mining due to its various applications. Recent studies challenge the effectiveness of popular deep learning methods for TSAD, suggesting their failure in…

Machine Learning · Computer Science 2026-05-29 Qideng Tang , Dai Chaofan , Wubin Ma , Yahui Wu , Haohao Zhou , Tao Zhang , Huan Li , Dalin Zhang

Universal visual anomaly detection (AD) aims to identify anomaly images and segment anomaly regions towards open and dynamic scenarios, following zero- and few-shot paradigms without any dataset-specific fine-tuning. We have witnessed…

Computer Vision and Pattern Recognition · Computer Science 2026-01-12 Bin-Bin Gao , Chengjie Wang

Visual anomaly detection aims to learn normality from normal images, but existing approaches are fragmented across various tasks: defect detection, semantic anomaly detection, multi-class anomaly detection, and anomaly clustering. This…

Computer Vision and Pattern Recognition · Computer Science 2023-11-15 Yujin Lee , Harin Lim , Seoyoon Jang , Hyunsoo Yoon

Recent advances in unsupervised anomaly detection (UAD) have shifted from single-class to multi-class scenarios. In such complex contexts, the increasing pattern diversity has brought two challenges to reconstruction-based approaches: (1)…

Computer Vision and Pattern Recognition · Computer Science 2025-04-22 Jingyu Xing , Chenwei Tang , Tao Wang , Rong Xiao , Wei Ju , Ji-Zhe Zhou , Liangli Zhen , Jiancheng Lv

Current remote sensing change detection (CD) methods mainly rely on specialized models, which limits the scalability toward modality-adaptive Earth observation. For homogeneous CD, precise boundary delineation relies on fine-grained spatial…

Computer Vision and Pattern Recognition · Computer Science 2026-01-22 Qingling Shu , Sibao Chen , Wei Lu , Zhihui You , Chengzhuang Liu

Dealing with atypical traffic scenarios remains a challenging task in autonomous driving. However, most anomaly detection approaches cannot be trained on raw sensor data but require exposure to outlier data and powerful semantic…

Computer Vision and Pattern Recognition · Computer Science 2024-10-02 Daniel Bogdoll , Noël Ollick , Tim Joseph , Svetlana Pavlitska , J. Marius Zöllner

With the exponential growth of multimedia data, leveraging multimodal sensors presents a promising approach for improving accuracy in human activity recognition. Nevertheless, accurately identifying these activities using both video data…

Computer Vision and Pattern Recognition · Computer Science 2024-08-09 Rex Liu , Xin Liu

Multimodal feature reconstruction is a promising approach for 3D anomaly detection, leveraging the complementary information from dual modalities. We further advance this paradigm by utilizing multi-modal mentor learning, which fuses…

Computer Vision and Pattern Recognition · Computer Science 2025-06-05 Hanzhe Liang

Current vision-language models have been explored for multi-modal embedding tasks like information retrieval. However, they face significant challenges in real-world queries and targets involving diverse modality combinations, as existing…

Computer Vision and Pattern Recognition · Computer Science 2026-05-07 Jiajun Qin , Yuan Pu , Zhuolun He , Seunggeun Kim , David Z. Pan , Bei Yu