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With the widespread deployment of video surveillance devices and the demand for intelligent system development, video anomaly detection (VAD) has become an important part of constructing intelligent surveillance systems. Expanding the…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Jiahao Lyu , Minghua Zhao , Jing Hu , Runtao Xi , Xuewen Huang , Shuangli Du , Cheng Shi , Tian Ma

This paper explores the problem of Generalist Anomaly Detection (GAD), aiming to train one single detection model that can generalize to detect anomalies in diverse datasets from different application domains without any further training on…

Computer Vision and Pattern Recognition · Computer Science 2024-03-19 Jiawen Zhu , Guansong Pang

Unsupervised approaches for video anomaly detection may not perform as good as supervised approaches. However, learning unknown types of anomalies using an unsupervised approach is more practical than a supervised approach as annotation is…

Computer Vision and Pattern Recognition · Computer Science 2022-11-03 Kamalakar Thakare , Yash Raghuwanshi , Debi Prosad Dogra , Heeseung Choi , Ig-Jae Kim

Many types of anomaly detection methods have been proposed recently, and applied to a wide variety of fields including medical screening and production quality checking. Some methods have utilized images, and, in some cases, a part of the…

Computer Vision and Pattern Recognition · Computer Science 2018-10-08 Minori Narita , Daiki Kimura , Ryuki Tachibana

Unsupervised anomaly detection (UAD) has been widely implemented in industrial and medical applications, which reduces the cost of manual annotation and improves efficiency in disease diagnosis. Recently, deep auto-encoder with its variants…

Computer Vision and Pattern Recognition · Computer Science 2023-03-31 Mingqing Wang , Jiawei Li , Zhenyang Li , Chengxiao Luo , Bin Chen , Shu-Tao Xia , Zhi Wang

Unsupervised anomaly detection (UAD) seeks to localize the anomaly mask of an input image with respect to normal samples. Either by reconstructing normal counterparts (reconstruction-based) or by learning an image feature embedding space…

Image and Video Processing · Electrical Eng. & Systems 2025-10-06 Zhe Zhang , Mingxiu Cai , Hanxiao Wang , Gaochang Wu , Tianyou Chai , Xiatian Zhu

This thesis is part of a CIFRE agreement between the company Othello and the LIASD laboratory. The objective is to develop an artificial intelligence system that can detect real-time dangers in a video stream. To achieve this, a novel…

Computer Vision and Pattern Recognition · Computer Science 2024-12-02 Fabien Poirier

Detecting anomalies within point clouds is crucial for various industrial applications, but traditional unsupervised methods face challenges due to data acquisition costs, early-stage production constraints, and limited generalization…

Computer Vision and Pattern Recognition · Computer Science 2024-09-23 Yuqi Cheng , Yunkang Cao , Guoyang Xie , Zhichao Lu , Weiming Shen

This paper explores the problem of class-agnostic anomaly detection (AD), where the objective is to train one class-agnostic AD model that can generalize to detect anomalies in diverse new classes from different domains without any…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Xincheng Yao , Chao Shi , Muming Zhao , Guangtao Zhai , Chongyang Zhang

In the realm of diverse high-dimensional data, images play a significant role across various processes of manufacturing systems where efficient image anomaly detection has emerged as a core technology of utmost importance. However, when…

Computer Vision and Pattern Recognition · Computer Science 2025-12-24 Ji Song , Xing Wang , Jianguo Wu , Xiaowei Yue

Universal visual anomaly detection (AD) aims to identify anomaly images and segment anomaly regions towards open and dynamic scenarios, following zero- and few-shot paradigms without any dataset-specific fine-tuning. We have witnessed…

Computer Vision and Pattern Recognition · Computer Science 2026-01-12 Bin-Bin Gao , Chengjie Wang

Due to the limited availability of anomaly examples, video anomaly detection is often seen as one-class classification (OCC) problem. A popular way to tackle this problem is by utilizing an autoencoder (AE) trained only on normal data. At…

Computer Vision and Pattern Recognition · Computer Science 2021-10-20 Marcella Astrid , Muhammad Zaigham Zaheer , Seung-Ik Lee

Time series anomaly detection plays a crucial role in a wide range of real-world applications. Given that time series data can exhibit different patterns at different sampling granularities, multi-scale modeling has proven beneficial for…

Machine Learning · Computer Science 2025-10-15 Beibu Li , Qichao Shentu , Yang Shu , Hui Zhang , Ming Li , Ning Jin , Bin Yang , Chenjuan Guo

Accurately estimating the orientation of pedestrians is an important and challenging task for autonomous driving because this information is essential for tracking and predicting pedestrian behavior. This paper presents a flexible Virtual…

Computer Vision and Pattern Recognition · Computer Science 2019-07-17 Jason Ku , Alex D. Pon , Sean Walsh , Steven L. Waslander

Anomalies are those deviating from the norm. Unsupervised anomaly detection often translates to identifying low density regions. Major problems arise when data is high-dimensional and mixed of discrete and continuous attributes. We propose…

Machine Learning · Computer Science 2016-10-21 Kien Do , Truyen Tran , Svetha Venkatesh

Although unsupervised generative modeling of an image dataset using a Variational AutoEncoder (VAE) has been used to detect anomalous images, or anomalous regions in images, recent works have shown that this method often identifies images…

Computer Vision and Pattern Recognition · Computer Science 2020-08-13 David Dehaene , Pierre Eline

The paper explores the industrial multimodal Anomaly Detection (AD) task, which exploits point clouds and RGB images to localize anomalies. We introduce a novel light and fast framework that learns to map features from one modality to the…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Alex Costanzino , Pierluigi Zama Ramirez , Giuseppe Lisanti , Luigi Di Stefano

Visual Anomaly Detection (VAD) is a critical task for many applications including industrial inspection and healthcare. While VAD has been extensively studied, two key challenges remain largely unaddressed in conjunction: edge deployment,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-09 Manuel Barusco , Francesco Borsatti , David Petrovic , Davide Dalle Pezze , Gian Antonio Susto

Visual Anomaly Detection (VAD) is a key task in industrial settings, where minimizing operational costs is essential. Deploying deep learning models within Internet of Things (IoT) environments introduces specific challenges due to limited…

Computer Vision and Pattern Recognition · Computer Science 2025-12-15 Arianna Stropeni , Francesco Borsatti , Manuel Barusco , Davide Dalle Pezze , Marco Fabris , Gian Antonio Susto

Image anomaly detection and localization perform not only image-level anomaly classification but also locate pixel-level anomaly regions. Recently, it has received much research attention due to its wide application in various fields. This…

Computer Vision and Pattern Recognition · Computer Science 2024-05-28 Chao Huang , Zhao Kang , Hong Wu
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