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Video anomaly detection (VAD) is an essential task in the image processing community with prospects in video surveillance, which faces fundamental challenges in balancing detection accuracy with computational efficiency. As video content…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Yang Liu , Boan Chen , Xiaoguang Zhu , Jing Liu , Peng Sun , Wei Zhou

Logs play a crucial role in system monitoring and debugging by recording valuable system information, including events and states. Although various methods have been proposed to detect anomalies in log sequences, they often overlook the…

Machine Learning · Computer Science 2023-09-13 Yufei Li , Yanchi Liu , Haoyu Wang , Zhengzhang Chen , Wei Cheng , Yuncong Chen , Wenchao Yu , Haifeng Chen , Cong Liu

Graph Anomaly Detection (GAD) aims to identify atypical graph entities, such as nodes, edges, or substructures, that deviate significantly from the majority. While existing text-rich approaches typically integrate structural context into…

Computation and Language · Computer Science 2026-05-20 Wen Shi , Zhe Wang , Huafei Huang , Qing Qing , Ziqi Xu , Qixin Zhang , Xikun Zhang , Renqiang Luo , Feng Xia

Medical ultrasound video analysis is challenging due to variable sequence lengths, subtle spatial cues, and the need for interpretable video-level assessment. We introduce GADA, a Graph Attention-based Detection Aggregation framework that…

Image and Video Processing · Electrical Eng. & Systems 2025-10-14 Li Chen , Naveen Balaraju , Jochen Kruecker , Balasundar Raju , Alvin Chen

Video anomaly detection (VAD) holds immense importance across diverse domains such as surveillance, healthcare, and environmental monitoring. While numerous surveys focus on conventional VAD methods, they often lack depth in exploring…

Computer Vision and Pattern Recognition · Computer Science 2024-07-02 Moshira Abdalla , Sajid Javed , Muaz Al Radi , Anwaar Ulhaq , Naoufel Werghi

The strong temporal consistency of surveillance video enables compelling compression performance with traditional methods, but downstream vision applications operate on decoded image frames with a high data rate. Since it is not…

Multimedia · Computer Science 2024-02-09 Andrew C. Freeman , Ketan Mayer-Patel , Montek Singh

Few-shot anomaly detection (FSAD) aims to detect unseen anomaly regions with the guidance of very few normal support images from the same class. Existing FSAD methods usually find anomalies by directly designing complex text prompts to…

Computer Vision and Pattern Recognition · Computer Science 2025-04-17 Fenfang Tao , Guo-Sen Xie , Fang Zhao , Xiangbo Shu

The primary challenge in Video Object Detection (VOD) is effectively exploiting temporal information to enhance object representations. Traditional strategies, such as aggregating region proposals, often suffer from feature variance due to…

Computer Vision and Pattern Recognition · Computer Science 2024-12-09 Khurram Azeem Hashmi , Talha Uddin Sheikh , Didier Stricker , Muhammad Zeshan Afzal

This paper investigates the performance of diffusion models for video anomaly detection (VAD) within the most challenging but also the most operational scenario in which the data annotations are not used. As being sparse, diverse,…

Computer Vision and Pattern Recognition · Computer Science 2023-07-04 Anil Osman Tur , Nicola Dall'Asen , Cigdem Beyan , Elisa Ricci

Recent advances in AI-driven image generation have introduced new challenges for verifying the authenticity of digital evidence in forensic investigations. Modern generative models can produce visually consistent forgeries that evade…

Computer Vision and Pattern Recognition · Computer Science 2025-12-18 Opeyemi Bamigbade , Mark Scanlon , John Sheppard

This paper considers few-shot anomaly detection (FSAD), a practical yet under-studied setting for anomaly detection (AD), where only a limited number of normal images are provided for each category at training. So far, existing FSAD studies…

Computer Vision and Pattern Recognition · Computer Science 2022-07-18 Chaoqin Huang , Haoyan Guan , Aofan Jiang , Ya Zhang , Michael Spratling , Yan-Feng Wang

Most existing anomaly detection (AD) methods require a dedicated model for each category. Such a paradigm, despite its promising results, is computationally expensive and inefficient, thereby failing to meet the requirements for realworld…

Computer Vision and Pattern Recognition · Computer Science 2024-10-10 Chaoqin Huang , Haoyan Guan , Aofan Jiang , Ya Zhang , Michael Spratling , Xinchao Wang , Yanfeng Wang

Video anomaly detection (VAD) has been intensively studied for years because of its potential applications in intelligent video systems. Existing unsupervised VAD methods tend to learn normality from training sets consisting of only normal…

Computer Vision and Pattern Recognition · Computer Science 2023-01-10 Mengyang Zhao , Xinhua Zeng , Yang Liu , Jing Liu , Di Li , Xing Hu , Chengxin Pang

Anomaly detection in videos refers to the identification of events that do not conform to expected behavior. However, almost all existing methods tackle the problem by minimizing the reconstruction errors of training data, which cannot…

Computer Vision and Pattern Recognition · Computer Science 2018-03-14 Wen Liu , Weixin Luo , Dongze Lian , Shenghua Gao

Anomaly recognition plays a vital role in surveillance, transportation, healthcare, and public safety. However, most existing approaches rely solely on visual data, making them unreliable under challenging conditions such as occlusion, low…

Computer Vision and Pattern Recognition · Computer Science 2025-11-12 Amjid Ali , Zulfiqar Ahmad Khan , Altaf Hussain , Muhammad Munsif , Adnan Hussain , Sung Wook Baik

Human-centric Video Anomaly Detection (VAD) aims to identify human behaviors that deviate from normal. At its core, human-centric VAD faces substantial challenges, such as the complexity of diverse human behaviors, the rarity of anomalies,…

Computer Vision and Pattern Recognition · Computer Science 2025-03-21 Armin Danesh Pazho , Shanle Yao , Ghazal Alinezhad Noghre , Babak Rahimi Ardabili , Vinit Katariya , Hamed Tabkhi

Graph-level anomaly detection aims to identify anomalous graphs or subgraphs within graph datasets, playing a vital role in various fields such as fraud detection, review classification, and biochemistry. While Graph Neural Networks (GNNs)…

Machine Learning · Computer Science 2025-10-10 Liting Li , Yumeng Wang , Yueheng Sun

Fusing Events and RGB images for object detection leverages the robustness of Event cameras in adverse environments and the rich semantic information provided by RGB cameras. However, two critical mismatches: low-latency Events…

Computer Vision and Pattern Recognition · Computer Science 2025-02-28 Haitian Zhang , Xiangyuan Wang , Chang Xu , Xinya Wang , Fang Xu , Huai Yu , Lei Yu , Wen Yang

Detecting anomalous nodes in attributed networks, where each node is associated with both structural connections and descriptive attributes, is essential for identifying fraud, misinformation, and suspicious behavior in domains such as…

Social and Information Networks · Computer Science 2025-10-31 Apu Chakraborty , Anshul Kumar , Gagan Raj Gupta

Video anomaly detection (VAD) methods are mostly CNN-based or Transformer-based, achieving impressive results, but the focus on detection accuracy often comes at the expense of inference speed. The emergence of state space models in…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Jiahao Lyu , Minghua Zhao , Jing Hu , Xuewen Huang , Yifei Chen , Shuangli Du
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