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Anomaly detection aims at identifying deviant samples from the normal data distribution. Contrastive learning has provided a successful way to sample representation that enables effective discrimination on anomalies. However, when…

计算机视觉与模式识别 · 计算机科学 2022-07-26 Gaoang Wang , Yibing Zhan , Xinchao Wang , Mingli Song , Klara Nahrstedt

Unsupervised anomaly in industry has been a concerning topic and a stepping stone for high performance industrial automation process. The vast majority of industry-oriented methods focus on learning from good samples to detect anomaly…

计算机视觉与模式识别 · 计算机科学 2023-06-21 Simon Thomine , Hichem Snoussi , Mahmoud Soua

Despite the impressive performance of current vision-based facial action unit (AU) detection approaches, they are heavily susceptible to the variations across different domains and the cross-domain AU detection methods are under-explored.…

计算机视觉与模式识别 · 计算机科学 2025-03-13 Yong Li , Menglin Liu , Zhen Cui , Yi Ding , Yuan Zong , Wenming Zheng , Shiguang Shan , Cuntai Guan

Crater detection can provide valuable information for humans to explore the topography and understand the history of extraterrestrial planets. Due to the significantly varying scenario distributions, existing detection models trained on…

计算机视觉与模式识别 · 计算机科学 2024-06-12 Yifan Liu , Tiecheng Song , Chengye Xian , Ruiyuan Chen , Yi Zhao , Rui Li , Tan Guo

Reliably detecting anomalies in a given set of images is a task of high practical relevance for visual quality inspection, surveillance, or medical image analysis. Autoencoder neural networks learn to reconstruct normal images, and hence…

机器学习 · 计算机科学 2019-01-21 Laura Beggel , Michael Pfeiffer , Bernd Bischl

Traditional deep learning models often lack annotated data, especially in cross-domain applications such as anomaly detection, which is critical for early disease diagnosis in medicine and defect detection in industry. To address this…

计算机视觉与模式识别 · 计算机科学 2026-02-06 Wahyu Rahmaniar , Kenji Suzuki

Visual anomaly detection targets to detect images that notably differ from normal pattern, and it has found extensive application in identifying defective parts within the manufacturing industry. These anomaly detection paradigms…

计算机视觉与模式识别 · 计算机科学 2024-11-15 Anindya Sundar Das , Guansong Pang , Monowar Bhuyan

Generative adversarial networks (GANs) have shown promise for various problems including anomaly detection. When anomaly detection is performed using GAN models that learn only the features of normal data samples, data that are not similar…

机器学习 · 计算机科学 2020-12-23 Teguh Budianto , Tomohiro Nakai , Kazunori Imoto , Takahiro Takimoto , Kosuke Haruki

Authentication is a task aiming to confirm the truth between data instances and personal identities. Typical authentication applications include face recognition, person re-identification, authentication based on mobile devices and so on.…

机器学习 · 统计学 2019-05-29 Jian Liang , Yuren Cao , Chenbin Zhang , Shiyu Chang , Kun Bai , Zenglin Xu

We focus on a specific use case in anomaly detection where the distribution of normal samples is supported by a lower-dimensional manifold. Here, regularized autoencoders provide a popular approach by learning the identity mapping on the…

计算机视觉与模式识别 · 计算机科学 2024-05-14 Alexander Bauer , Shinichi Nakajima , Klaus-Robert Müller

Unsupervised anomaly detection (UAD) learns one-class classifiers exclusively with normal (i.e., healthy) images to detect any abnormal (i.e., unhealthy) samples that do not conform to the expected normal patterns. UAD has two main…

计算机视觉与模式识别 · 计算机科学 2021-07-01 Yu Tian , Guansong Pang , Fengbei Liu , Yuanhong chen , Seon Ho Shin , Johan W. Verjans , Rajvinder Singh , Gustavo Carneiro

In this work, we train a network to simultaneously perform segmentation and pixel-wise Out-of-Distribution (OoD) detection, such that the segmentation of unknown regions of scenes can be rejected. This is made possible by leveraging an OoD…

计算机视觉与模式识别 · 计算机科学 2021-03-02 David Williams , Matthew Gadd , Daniele De Martini , Paul Newman

Test-time adaptation is a special setting of unsupervised domain adaptation where a trained model on the source domain has to adapt to the target domain without accessing source data. We propose a novel way to leverage self-supervised…

计算机视觉与模式识别 · 计算机科学 2022-04-25 Dian Chen , Dequan Wang , Trevor Darrell , Sayna Ebrahimi

Automated surface-anomaly detection using machine learning has become an interesting and promising area of research, with a very high and direct impact on the application domain of visual inspection. Deep-learning methods have become the…

计算机视觉与模式识别 · 计算机科学 2019-06-12 Domen Tabernik , Samo Šela , Jure Skvarč , Danijel Skočaj

The external visual inspections of rolling stock's underfloor equipment are currently being performed via human visual inspection. In this study, we attempt to partly automate visual inspection by investigating anomaly inspection algorithms…

计算机视觉与模式识别 · 计算机科学 2022-12-23 Yohei Baba , Takuro Hoshi , Ryosuke Mori , Gaurang Gavai

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

It is well-known that in inverse problems, end-to-end trained networks overfit the degradation model seen in the training set, i.e., they do not generalize to other types of degradations well. Recently, an approach to first map images…

图像与视频处理 · 电气工程与系统科学 2021-06-02 Cansu Korkmaz , A. Murat Tekalp , Zafer Dogan

Graph anomaly detection aims to identify abnormal patterns in networks, but faces significant challenges from label scarcity and extreme class imbalance. While graph contrastive learning offers a promising unsupervised solution, existing…

机器学习 · 计算机科学 2026-01-30 Kamal Berahmand , Saman Forouzandeh , Mehrnoush Mohammadi , Parham Moradi , Mahdi Jalili

Recently, anomaly scores have been formulated using reconstruction loss of the adversarially learned generators and/or classification loss of discriminators. Unavailability of anomaly examples in the training data makes optimization of such…

计算机视觉与模式识别 · 计算机科学 2024-10-28 Muhammad Zaigham Zaheer , Jin Ha Lee , Arif Mahmood , Marcella Astrid , Seung-Ik Lee

Neural networks follow a gradient-based learning scheme, adapting their mapping parameters by back-propagating the output loss. Samples unlike the ones seen during training cause a different gradient distribution. Based on this intuition,…

机器学习 · 计算机科学 2023-04-25 Jan-Philipp Schulze , Philip Sperl , Ana Răduţoiu , Carla Sagebiel , Konstantin Böttinger