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Anomaly detection is a fundamental problem in computer vision area with many real-world applications. Given a wide range of images belonging to the normal class, emerging from some distribution, the objective of this task is to construct…

Computer Vision and Pattern Recognition · Computer Science 2020-07-15 Chengwei Chen , Pan Chen , Haichuan Song , Yiqing Tao , Yuan Xie , Shouhong Ding , Lizhuang Ma

Due to the difficulty of obtaining labeled data for hyperspectral images (HSIs), cross-scene classification has emerged as a widely adopted approach in the remote sensing community. It involves training a model using labeled data from a…

Computer Vision and Pattern Recognition · Computer Science 2025-02-26 Rong Liu , Junye Liang , Jiaqi Yang , Jiang He , Peng Zhu

Background subtraction (BGS) is utilized to detect moving objects in a video and is commonly employed at the onset of object tracking and human recognition processes. Nevertheless, existing BGS techniques utilizing deep learning still…

Computer Vision and Pattern Recognition · Computer Science 2025-05-13 Zhixuan Zhang , Xiaopeng Li , Qi Liu

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…

Computer Vision and Pattern Recognition · Computer Science 2023-12-12 Haoyang He , Jiangning Zhang , Hongxu Chen , Xuhai Chen , Zhishan Li , Xu Chen , Yabiao Wang , Chengjie Wang , Lei Xie

Infrared small target detection based on deep learning offers unique advantages in separating small targets from complex and dynamic backgrounds. However, the features of infrared small targets gradually weaken as the depth of convolutional…

Computer Vision and Pattern Recognition · Computer Science 2024-01-18 Chun Bao , Jie Cao , Yaqian Ning , Tianhua Zhao , Zhijun Li , Zechen Wang , Li Zhang , Qun Hao

Due to scarcity of anomaly situations in the early manufacturing stage, an unsupervised anomaly detection (UAD) approach is widely adopted which only uses normal samples for training. This approach is based on the assumption that the…

Computer Vision and Pattern Recognition · Computer Science 2023-11-13 YeongHyeon Park , Sungho Kang , Myung Jin Kim , Yeonho Lee , Hyeong Seok Kim , Juneho Yi

We focus on the real-world problem of training accurate deep models for image classification of a small number of rare categories. In these scenarios, almost all images belong to the background category in the dataset (>95% of the dataset…

Computer Vision and Pattern Recognition · Computer Science 2020-09-01 Ravi Teja Mullapudi , Fait Poms , William R. Mark , Deva Ramanan , Kayvon Fatahalian

The UNet model consists of fully convolutional network (FCN) layers arranged as contracting encoder and upsampling decoder maps. Nested arrangements of these encoder and decoder maps give rise to extensions of the UNet model, such as UNete…

Image and Video Processing · Electrical Eng. & Systems 2023-04-11 Yilong Yang , Srinandan Dasmahapatra , Sasan Mahmoodi

The high performance of denoising diffusion models for image generation has paved the way for their application in unsupervised medical anomaly detection. As diffusion-based methods require a lot of GPU memory and have long sampling times,…

Computer Vision and Pattern Recognition · Computer Science 2024-03-19 Julia Wolleb , Florentin Bieder , Paul Friedrich , Peter Zhang , Alicia Durrer , Philippe C. Cattin

Anomaly detection tools and methods present a key capability in modern cyberphysical and failure prediction systems. Despite the fast-paced development in deep learning architectures for anomaly detection, model optimization for a given…

Machine Learning · Computer Science 2023-05-29 Marcin Pietron , Dominik Zurek , Kamil Faber , Roberto Corizzo

Advances in deep neural networks (DNN) greatly bolster real-time detection of anomalous IoT data. However, IoT devices can hardly afford complex DNN models, and offloading anomaly detection tasks to the cloud incurs long delay. In this…

Machine Learning · Computer Science 2020-04-16 Mao V. Ngo , Tie Luo , Hakima Chaouchi , Tony Q. S. Quek

Even though convolutional neural networks can classify objects in images very accurately, it is well known that the attention of the network may not always be on the semantically important regions of the scene. It has been observed that…

Computer Vision and Pattern Recognition · Computer Science 2022-02-10 Maliha Arif , Calvin Yong , Abhijit Mahalanobis

In the realm of machine learning, the study of anomaly detection and localization within image data has gained substantial traction, particularly for practical applications such as industrial defect detection. While the majority of existing…

Computer Vision and Pattern Recognition · Computer Science 2023-05-02 Wenping Jin , Fei Guo , Li Zhu

With the hyperspectral imaging technology, hyperspectral data provides abundant spectral information and plays a more important role in geological survey, vegetation analysis and military reconnaissance. Different from normal change…

Image and Video Processing · Electrical Eng. & Systems 2020-10-28 Meiqi Hu , Chen Wu , Liangpei Zhang , Bo Du

The majority of existing hyperspectral anomaly detection (HAD) methods use the low-rank representation (LRR) model to separate the background and anomaly components, where the anomaly component is optimized by handcrafted sparse priors…

Computer Vision and Pattern Recognition · Computer Science 2024-04-23 Yidan Liu , Weiying Xie , Kai Jiang , Jiaqing Zhang , Yunsong Li , Leyuan Fang

A recent class of hyperspectral anomaly detection methods can be trained once on background datasets and then deployed universally without per-scene retraining or parameter tuning, showing strong efficiency and robustness. Building upon…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 Wenping Jin , Li Zhu , Fei Guo

Blind image separation (BIS) refers to the inverse problem of simultaneously estimating and restoring multiple independent source images from a single observation image under conditions of unknown mixing mode and without prior knowledge of…

Computer Vision and Pattern Recognition · Computer Science 2026-02-17 Jingwei Li , Wei Pu

We propose a novel hyperspectral (HS) anomaly detection method that is robust to various types of noise. Most existing HS anomaly detection methods are designed without explicit consideration of noise or are based on the assumption of…

Image and Video Processing · Electrical Eng. & Systems 2026-02-04 Koyo Sato , Shunsuke Ono

<<<This is a pre-acceptance version, please, go through Pattern Recognition Journal on Sciencedirect to read the final version>>>. Edge detection is the basis of many computer vision applications. State of the art predominantly relies on…

Computer Vision and Pattern Recognition · Computer Science 2023-02-28 Xavier Soria , Angel Sappa , Patricio Humanante , Arash Akbarinia

The detection and classification of anomalies in gravitational wave data plays a critical role in improving the sensitivity of searches for signals of astrophysical origins. We present ABNORMAL (AI Based Nonstationarity Observer for…

General Relativity and Quantum Cosmology · Physics 2025-08-28 Yi-Yang Guo , Soumya D. Mohanty , Xie Qunying , Yu-Xiao Liu