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Anomaly detection in medical imaging is to distinguish the relevant biomarkers of diseases from those of normal tissues. Deep supervised learning methods have shown potentials in various detection tasks, but its performances would be…

图像与视频处理 · 电气工程与系统科学 2021-12-01 Byungjai Kim , Kinam Kwon , Changheun Oh , Hyunwook Park

In the domain of anomaly detection, methods often excel in either high-level semantic or low-level industrial benchmarks, rarely achieving cross-domain proficiency. Semantic anomalies are novelties that differ in meaning from the training…

计算机视觉与模式识别 · 计算机科学 2024-07-18 Luc P. J. Sträter , Mohammadreza Salehi , Efstratios Gavves , Cees G. M. Snoek , Yuki M. Asano

In the advancement of industrial informatization, unsupervised anomaly detection technology effectively overcomes the scarcity of abnormal samples and significantly enhances the automation and reliability of smart manufacturing. As an…

计算机视觉与模式识别 · 计算机科学 2025-03-24 Yuxuan Lin , Yang Chang , Xuan Tong , Jiawen Yu , Antonio Liotta , Guofan Huang , Wei Song , Deyu Zeng , Zongze Wu , Yan Wang , Wenqiang Zhang

Due to the diversity of brain anatomy and the scarcity of annotated data, supervised anomaly detection for brain MRI remains challenging, driving the development of unsupervised anomaly detection (UAD) approaches. Current UAD methods…

计算机视觉与模式识别 · 计算机科学 2026-01-01 Hao Li , Zhenfeng Zhuang , Jingyu Lin , Yu Liu , Yifei Chen , Qiong Peng , Lequan Yu , Liansheng Wang

Multivariate time series anomaly detection (MTAD) plays a vital role in a wide variety of real-world application domains. Over the past few years, MTAD has attracted rapidly increasing attention from both academia and industry. Many deep…

机器学习 · 计算机科学 2023-06-13 Feng Xia , Xin Chen , Shuo Yu , Mingliang Hou , Mujie Liu , Linlin You

Anomaly detection is vital in various industrial scenarios, including the identification of unusual patterns in production lines and the detection of manufacturing defects for quality control. Existing techniques tend to be specialized in…

计算机视觉与模式识别 · 计算机科学 2025-05-21 Xiaohao Xu , Yunkang Cao , Huaxin Zhang , Nong Sang , Xiaonan Huang

Point cloud (PCD) anomaly detection steadily emerges as a promising research area. This study aims to improve PCD anomaly detection performance by combining handcrafted PCD descriptions with powerful pre-trained 2D neural networks. To this…

计算机视觉与模式识别 · 计算机科学 2025-02-17 Yunkang Cao , Xiaohao Xu , Weiming Shen

Unsupervised anomaly detection (UAD) from images strives to model normal data distributions, creating discriminative representations to distinguish and precisely localize anomalies. Despite recent advancements in the efficient and unified…

计算机视觉与模式识别 · 计算机科学 2025-03-11 Wenxin Ma , Qingsong Yao , Xiang Zhang , Zhelong Huang , Zihang Jiang , S. Kevin Zhou

This study explores the recently proposed and challenging multi-view Anomaly Detection (AD) task. Single-view tasks will encounter blind spots from other perspectives, resulting in inaccuracies in sample-level prediction. Therefore, we…

计算机视觉与模式识别 · 计算机科学 2025-08-12 Haoyang He , Jiangning Zhang , Guanzhong Tian , Chengjie Wang , Lei Xie

The purpose of multimodal industrial anomaly detection is to detect complex geometric shape defects such as subtle surface deformations and irregular contours that are difficult to detect in 2D-based methods. However, current multimodal…

计算机视觉与模式识别 · 计算机科学 2026-03-25 Min Li , Jinghui He , Gang Li , Jiachen Li , Jin Wan , Delong Han

Reconstruction-based approaches have achieved remarkable outcomes in anomaly detection. The exceptional image reconstruction capabilities of recently popular diffusion models have sparked research efforts to utilize them for enhanced…

计算机视觉与模式识别 · 计算机科学 2023-12-12 Haoyang He , Jiangning Zhang , Hongxu Chen , Xuhai Chen , Zhishan Li , Xu Chen , Yabiao Wang , Chengjie Wang , Lei Xie

Video anomaly detection is a subject of great interest across industrial and academic domains due to its crucial role in computer vision applications. However, the inherent unpredictability of anomalies and the scarcity of anomaly samples…

计算机视觉与模式识别 · 计算机科学 2024-09-27 Yalong Jiang , Liquan Mao

Unsupervised anomaly detection plays a pivotal role in industrial defect inspection and medical image analysis, with most methods relying on the reconstruction framework. However, these methods may suffer from over-generalization, enabling…

计算机视觉与模式识别 · 计算机科学 2026-03-25 Wei Luo , Peng Xing , Yunkang Cao , Haiming Yao , Weiming Shen , Zechao Li

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

Unsupervised anomaly detection (UAD) attracts a lot of research interest and drives widespread applications, where only anomaly-free samples are available for training. Some UAD applications intend to further locate the anomalous regions…

计算机视觉与模式识别 · 计算机科学 2023-08-30 Yixuan Zhou , Xing Xu , Jingkuan Song , Fumin Shen , Heng Tao Shen

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…

计算机视觉与模式识别 · 计算机科学 2024-11-26 Hossein Kashiani , Niloufar Alipour Talemi , Fatemeh Afghah

The latest trend in anomaly detection is to train a unified model instead of training a separate model for each category. However, existing multi-class anomaly detection (MCAD) models perform poorly in multi-view scenarios because they…

计算机视觉与模式识别 · 计算机科学 2025-05-01 Qianzi Yu , Yang Cao , Yu Kang

Anomaly detection (AD) is a fundamental task in computer vision. It aims to identify incorrect image data patterns which deviate from the normal ones. Conventional methods generally address AD by preparing augmented negative samples to…

计算机视觉与模式识别 · 计算机科学 2023-12-01 Jianjian Qin , Chunzhi Gu , Jun Yu , Chao Zhang

Unsupervised anomaly detection (UAD) is a widely adopted approach in industry due to rare anomaly occurrences and data imbalance. A desirable characteristic of an UAD model is contained generalization ability which excels in the…

计算机视觉与模式识别 · 计算机科学 2023-08-29 YeongHyeon Park , Sungho Kang , Myung Jin Kim , Hyeonho Jeong , Hyunkyu Park , Hyeong Seok Kim , Juneho Yi

Unsupervised anomaly localization aims to identify anomalous regions that deviate from normal sample patterns. Most recent methods perform feature matching or reconstruction for the target sample with pre-trained deep neural networks.…

计算机视觉与模式识别 · 计算机科学 2026-04-15 Katsuya Hotta , Chao Zhang , Yoshihiro Hagihara , Takuya Akashi