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As a fundamental data mining task, unsupervised time series anomaly detection (TSAD) aims to build a model for identifying abnormal timestamps without assuming the availability of annotations. A key challenge in unsupervised TSAD is that…

机器学习 · 计算机科学 2026-02-10 Dezheng Wang , Tong Chen , Guansong Pang , Congyan Chen , Shihua Li , Hongzhi Yin

Anomaly detection on attributed graphs is a crucial topic for its practical application. Existing methods suffer from semantic mixture and imbalance issue because they mainly focus on anomaly discrimination, ignoring representation…

机器学习 · 计算机科学 2023-04-12 YanMing Hu , Chuan Chen , BoWen Deng , YuJing Lai , Hao Lin , ZiBin Zheng , Jing Bian

Anomaly detection and localization in images is a growing field in computer vision. In this area, a seemingly understudied problem is anomaly clustering, i.e., identifying and grouping different types of anomalies in a fully unsupervised…

计算机视觉与模式识别 · 计算机科学 2024-04-19 Andrei-Timotei Ardelean , Tim Weyrich

Early detection of anomalies in medical images such as brain MRI is highly relevant for diagnosis and treatment of many conditions. Supervised machine learning methods are limited to a small number of pathologies where there is good…

计算机视觉与模式识别 · 计算机科学 2023-12-05 Alexander Frotscher , Jaivardhan Kapoor , Thomas Wolfers , Christian F. Baumgartner

Occluded person re-identification is a challenging task as human body parts could be occluded by some obstacles (e.g. trees, cars, and pedestrians) in certain scenes. Some existing pose-guided methods solve this problem by aligning body…

计算机视觉与模式识别 · 计算机科学 2021-12-14 Tao Wang , Hong Liu , Pinhao Song , Tianyu Guo , Wei Shi

High-performing out-of-distribution (OOD) detection, both anomaly and novel class, is an important prerequisite for the practical use of classification models. In this paper, we focus on the species recognition task in images concerned with…

计算机视觉与模式识别 · 计算机科学 2024-03-12 L. E. Hogeweg , R. Gangireddy , D. Brunink , V. J. Kalkman , L. Cornelissen , J. W. Kamminga

This study addresses the issue of fusing infrared and visible images that appear differently for object detection. Aiming at generating an image of high visual quality, previous approaches discover commons underlying the two modalities and…

计算机视觉与模式识别 · 计算机科学 2022-03-31 Jinyuan Liu , Xin Fan , Zhanbo Huang , Guanyao Wu , Risheng Liu , Wei Zhong , Zhongxuan Luo

Automatic detecting anomalous regions in images of objects or textures without priors of the anomalies is challenging, especially when the anomalies appear in very small areas of the images, making difficult-to-detect visual variations,…

计算机视觉与模式识别 · 计算机科学 2022-07-05 Jie Yang , Yong Shi , Zhiquan Qi

In this paper, we introduce the novel state-of-the-art Dual-attention Transformer and Discriminative Flow (DADF) framework for visual anomaly detection. Based on only normal knowledge, visual anomaly detection has wide applications in…

计算机视觉与模式识别 · 计算机科学 2023-04-03 Haiming Yao , Wei Luo , Wenyong Yu

Anomaly detection (AD) is essential for industrial inspection, yet existing methods typically rely on ``comparing'' test images to normal references from a training set. However, variations in appearance and positioning often complicate the…

计算机视觉与模式识别 · 计算机科学 2025-07-02 Wei Luo , Yunkang Cao , Haiming Yao , Xiaotian Zhang , Jianan Lou , Yuqi Cheng , Weiming Shen , Wenyong Yu

As human-machine interaction continues to evolve, the capacity for environmental perception is becoming increasingly crucial. Integrating the two most common types of sensory data, images, and point clouds, can enhance detection accuracy.…

计算机视觉与模式识别 · 计算机科学 2024-08-12 Kai Luo , Hao Wu , Kefu Yi , Kailun Yang , Wei Hao , Rongdong Hu

Most of previous deepfake detection researches bent their efforts to describe and discriminate artifacts in human perceptible ways, which leave a bias in the learned networks of ignoring some critical invariance features intra-class and…

计算机视觉与模式识别 · 计算机科学 2022-05-17 Ruiqi Zha , Zhichao Lian , Qianmu Li , Siqi Gu

Anomaly detection is a fundamental problem in data mining field with many real-world applications. A vast majority of existing anomaly detection methods predominately focused on data collected from a single source. In real-world…

机器学习 · 计算机科学 2019-08-13 Yuening Li , Ninghao Liu , Jundong Li , Mengnan Du , Xia Hu

Industrial anomaly detection is crucial for quality control and predictive maintenance, but it presents challenges due to limited training data, diverse anomaly types, and external factors that alter object appearances. Existing methods…

计算机视觉与模式识别 · 计算机科学 2024-10-22 Sukanya Patra , Souhaib Ben Taieb

Anomalies can be defined as any non-random structure which deviates from normality. Anomaly detection methods reported in the literature are numerous and diverse, as what is considered anomalous usually varies depending on particular…

计算机视觉与模式识别 · 计算机科学 2021-10-07 Matias Tailanian , Pablo Musé , Álvaro Pardo

This study presents an adversarial method for anomaly detection in real-world applications, leveraging the power of generative adversarial neural networks (GANs) through cycle consistency in reconstruction error. Previous methods suffer…

机器学习 · 计算机科学 2024-05-01 Zahra Dehghanian , Saeed Saravani , Maryam Amirmazlaghani , Mohammad Rahmati

Current unsupervised anomaly detection approaches perform well on public datasets but struggle with specific anomaly types due to the domain gap between pre-trained feature extractors and target-specific domains. To tackle this issue, this…

计算机视觉与模式识别 · 计算机科学 2024-07-02 Yun Liang , Zhiguang Hu , Junjie Huang , Donglin Di , Anyang Su , Lei Fan

Scene text recognition has been a hot research topic in computer vision due to its various applications. The state of the art is the attention-based encoder-decoder framework that learns the mapping between input images and output sequences…

计算机视觉与模式识别 · 计算机科学 2017-10-24 Zhanzhan Cheng , Fan Bai , Yunlu Xu , Gang Zheng , Shiliang Pu , Shuigeng Zhou

Defocus blur detection (DBD) separates in-focus and out-of-focus regions in an image. Previous approaches mistakenly mistook homogeneous areas in focus for defocus blur regions, likely due to not considering the internal factors that cause…

计算机视觉与模式识别 · 计算机科学 2023-06-21 Yuxin Jin , Ming Qian , Jincheng Xiong , Nan Xue , Gui-Song Xia

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…

计算机视觉与模式识别 · 计算机科学 2026-02-04 Ximiao Zhang , Min Xu , Zheng Zhang , Junlin Hu , Xiuzhuang Zhou