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In unsupervised image anomaly detection, reconstruction methods aim to train models to capture normal patterns comprehensively for normal data reconstruction. Yet, these models sometimes retain unintended reconstruction capacity for…

计算机视觉与模式识别 · 计算机科学 2025-11-19 Tingfeng Huang , Weijia Kong , Yuxuan Cheng , Jingbo Xia , Rui Yu , Jinhai Xiang , Xinwei He

Unsupervised anomaly detection aims to build models to effectively detect unseen anomalies by only training on the normal data. Although previous reconstruction-based methods have made fruitful progress, their generalization ability is…

机器学习 · 计算机科学 2022-01-04 Yuxin Zhang , Jindong Wang , Yiqiang Chen , Han Yu , Tao Qin

While the mainstream research in anomaly detection has mainly followed the one-class classification, practical industrial environments often incur noisy training data due to annotation errors or lack of labels for new or refurbished…

机器学习 · 计算机科学 2024-11-26 Jiin Im , Yongho Son , Je Hyeong Hong

Reconstruction-based approaches to anomaly detection tend to fall short when applied to complex datasets with target classes that possess high inter-class variance. Similar to the idea of self-taught learning used in transfer learning, many…

机器学习 · 计算机科学 2021-11-16 Muhammad S. Battikh , Artem A. Lenskiy

Masked Image Modeling (MIM) is a promising self-supervised learning approach that enables learning from unlabeled images. Despite its recent success, learning good representations through MIM remains challenging because it requires…

计算机视觉与模式识别 · 计算机科学 2024-02-28 Amir Bar , Florian Bordes , Assaf Shocher , Mahmoud Assran , Pascal Vincent , Nicolas Ballas , Trevor Darrell , Amir Globerson , Yann LeCun

Anomaly detection is important in many real-life applications. Recently, self-supervised learning has greatly helped deep anomaly detection by recognizing several geometric transformations. However these methods lack finer features, usually…

计算机视觉与模式识别 · 计算机科学 2022-12-12 Loic Jezequel , Ngoc-Son Vu , Jean Beaudet , Aymeric Histace

Visual anomaly detection is common in several applications including medical screening and production quality check. Although a definition of the anomaly is an unknown trend in data, in many cases some hints or samples of the anomaly class…

计算机视觉与模式识别 · 计算机科学 2019-03-29 Daiki Kimura , Minori Narita , Asim Munawar , Ryuki Tachibana

Detecting abnormal nodes from attributed networks is of great importance in many real applications, such as financial fraud detection and cyber security. This task is challenging due to both the complex interactions between the anomalous…

机器学习 · 计算机科学 2023-10-02 Jiaqiang Zhang , Senzhang Wang , Songcan Chen

Automated surface inspection is an important task in many manufacturing industries and often requires machine learning driven solutions. Supervised approaches, however, can be challenging, since it is often difficult to obtain large amounts…

计算机视觉与模式识别 · 计算机科学 2018-11-19 Matthias Haselmann , Dieter P. Gruber , Paul Tabatabai

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

Many active learning methods belong to the retraining-based approaches, which select one unlabeled instance, add it to the training set with its possible labels, retrain the classification model, and evaluate the criteria that we base our…

机器学习 · 统计学 2017-03-01 Yazhou Yang , Marco Loog

Unsupervised Anomaly Detection has become a popular method to detect pathologies in medical images as it does not require supervision or labels for training. Most commonly, the anomaly detection model generates a "normal" version of an…

图像与视频处理 · 电气工程与系统科学 2023-09-26 Felix Meissen , Johannes Paetzold , Georgios Kaissis , Daniel Rueckert

Weakly supervised instance labeling using only image-level labels, in lieu of expensive fine-grained pixel annotations, is crucial in several applications including medical image analysis. In contrast to conventional instance segmentation…

计算机视觉与模式识别 · 计算机科学 2019-07-31 Jayaraman J. Thiagarajan , Satyananda Kashyap , Alexandros Karagyris

To train the change detector, bi-temporal images taken at different times in the same area are used. However, collecting labeled bi-temporal images is expensive and time consuming. To solve this problem, various unsupervised change…

计算机视觉与模式识别 · 计算机科学 2022-04-06 Hyeoncheol Noh , Jingi Ju , Minseok Seo , Jongchan Park , Dong-Geol Choi

Anomaly detection involves identifying instances within a dataset that deviate from the norm and occur infrequently. Current benchmarks tend to favor methods biased towards low diversity in normal data, which does not align with real-world…

计算机视觉与模式识别 · 计算机科学 2024-06-18 Mohammad Akhavan Anvari , Rojina Kashefi , Vahid Reza Khazaie , Mohammad Khalooei , Mohammad Sabokrou

We empirically investigate the camera bias of person re-identification (ReID) models. Previously, camera-aware methods have been proposed to address this issue, but they are largely confined to training domains of the models. We measure the…

计算机视觉与模式识别 · 计算机科学 2025-02-17 Myungseo Song , Jin-Woo Park , Jong-Seok Lee

Despite the promising progress made in recent years, person re-identification (re-ID) remains a challenging task due to the complex variations in human appearances from different camera views. For this challenging problem, a large variety…

计算机视觉与模式识别 · 计算机科学 2017-05-02 Xun Yang , Meng Wang , Richang Hong , Qi Tian , Yong Rui

Unsupervised anomaly detection and segmentation methods train a model to learn the training distribution as `normal'. In the testing phase, they identify patterns that deviate from this normal distribution as `anomalies'. To learn the…

计算机视觉与模式识别 · 计算机科学 2025-10-16 Ziyun Liang , Xiaoqing Guo , Wentian Xu , Yasin Ibrahim , Natalie Voets , Pieter M Pretorius , J. Alison Noble , Konstantinos Kamnitsas

Current methods for reconstructing training data from trained classifiers are restricted to very small models, limited training set sizes, and low-resolution images. Such restrictions hinder their applicability to real-world scenarios. In…

机器学习 · 计算机科学 2024-07-23 Yakir Oz , Gilad Yehudai , Gal Vardi , Itai Antebi , Michal Irani , Niv Haim

Recent advances in domain adaptation show that deep self-training presents a powerful means for unsupervised domain adaptation. These methods often involve an iterative process of predicting on target domain and then taking the confident…

计算机视觉与模式识别 · 计算机科学 2020-07-16 Yang Zou , Zhiding Yu , Xiaofeng Liu , B. V. K. Vijaya Kumar , Jinsong Wang