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Video anomaly detection (VAD) aims to identify and ground anomalous behaviors or events in videos, serving as a core technology in the fields of intelligent surveillance and public safety. With the advancement of deep learning, the…

Computer Vision and Pattern Recognition · Computer Science 2025-07-30 Shibo Gao , Peipei Yang , Haiyang Guo , Yangyang Liu , Yi Chen , Shuai Li , Han Zhu , Jian Xu , Xu-Yao Zhang , Linlin Huang

Current state-of-the-art multi-class unsupervised anomaly detection (MUAD) methods rely on training encoder-decoder models to reconstruct anomaly-free features. We first show these approaches have an inherent fidelity-stability dilemma in…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Xingwu Zhang , Guanxuan Li , Paul Henderson , Gerardo Aragon-Camarasa , Zijun Long

Recent advances in Visual Anomaly Detection (VAD) have introduced sophisticated algorithms leveraging embeddings generated by pre-trained feature extractors. Inspired by these developments, we investigate the adaptation of such algorithms…

Video anomaly detection (VAD) has long been studied as a crucial problem in public security and crime prevention. In recent years, weakly-supervised VAD (WVAD) have attracted considerable attention due to their easy annotation process and…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Satoshi Hashimoto , Tatsuya Konishi , Tomoya Kaichi , Kazunori Matsumoto , Mori Kurokawa

Video anomaly detection (VAD) is essential for enhancing safety and security by identifying unusual events across different environments. Existing VAD benchmarks, however, are primarily designed for general-purpose scenarios, neglecting the…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Xinyi Zhao , Congjing Zhang , Pei Guo , Wei Li , Lin Chen , Chaoyue Zhao , Shuai Huang

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

We propose a novel unsupervised approach based on a two-stage object-centric adversarial framework that only needs object regions for detecting frame-level local anomalies in videos. The first stage consists in learning the correspondence…

Computer Vision and Pattern Recognition · Computer Science 2020-11-16 Pankaj Raj Roy , Guillaume-Alexandre Bilodeau , Lama Seoud

Video anomaly detection (VAD) is currently a challenging task due to the complexity of anomaly as well as the lack of labor-intensive temporal annotations. In this paper, we propose an end-to-end Global Information Guided (GIG) anomaly…

Computer Vision and Pattern Recognition · Computer Science 2021-04-15 Hui Lv , Chunyan Xu , Zhen Cui

Women's safety and security are paramount for a modern society. Crimes against women occur in daylight as well as in low-light conditions. Often, such events are captured through real-world surveillance cameras that operate at lower…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Sangeeta , Maddikuntla Sai Prajwal , Debi Prosad Dogra , Kamalakar Vijay Thakare , Hyungjoo Jung , Ig-Jae Kim , Heeseung Choi

Weakly supervised video anomaly detection (WSVAD) is a challenging task since only video-level labels are available for training. In previous studies, the discriminative power of the learned features is not strong enough, and the data…

Computer Vision and Pattern Recognition · Computer Science 2022-12-19 Congqi Cao , Xin Zhang , Shizhou Zhang , Peng Wang , Yanning Zhang

The ability to understand the surrounding scene is of paramount importance for Autonomous Vehicles (AVs). This paper presents a system capable to work in an online fashion, giving an immediate response to the arise of anomalies surrounding…

Computer Vision and Pattern Recognition · Computer Science 2025-06-19 Leonardo Rossi , Vittorio Bernuzzi , Tomaso Fontanini , Massimo Bertozzi , Andrea Prati

This paper introduces a novel anomaly detection (AD) problem aimed at identifying `odd-looking' objects within a scene by comparing them to other objects present. Unlike traditional AD benchmarks with fixed anomaly criteria, our task…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Ankan Bhunia , Changjian Li , Hakan Bilen

Pose-based anomaly detection is a video-analysis technique for detecting anomalous events or behaviors by examining human pose extracted from the video frames. Utilizing pose data alleviates privacy and ethical issues. Also,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-10 Ghazal Alinezhad Noghre , Armin Danesh Pazho , Vinit Katariya , Hamed Tabkhi

Developing an accurate and fast anomaly detection model is an important task in real-time computer vision applications. There has been much research to develop a single model that detects either structural or logical anomalies, which are…

Computer Vision and Pattern Recognition · Computer Science 2024-12-10 Shota Sugawara , Ryuji Imamura

Video Anomaly Detection (VAD) aims to identify and locate deviations from normal patterns in video sequences. Traditional methods often struggle with substantial computational demands and a reliance on extensive labeled datasets, thereby…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Zhaolin Cai , Fan Li , Ziwei Zheng , Yanjun Qin

Video anomaly detection (VAD) is a critical yet challenging task due to the complex and diverse nature of real-world scenarios. Previous methods typically rely on domain-specific training data and manual adjustments when applying to new…

Computer Vision and Pattern Recognition · Computer Science 2025-10-29 Zhiwei Yang , Chen Gao , Mike Zheng Shou

Space missions generate massive volumes of high-resolution orbital and surface imagery that far exceed the capacity for manual inspection. Detecting rare phenomena is scientifically critical, yet traditional supervised learning struggles…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Fabrizio Genilotti , Arianna Stropeni , Francesco Borsatti , Manuel Barusco , Davide Dalle Pezze , Gian Antonio Susto

With the recent advances in deep neural networks, anomaly detection in multimedia has received much attention in the computer vision community. While reconstruction-based methods have recently shown great promise for anomaly detection, the…

Computer Vision and Pattern Recognition · Computer Science 2020-12-15 Chaoqin Huang , Fei Ye , Jinkun Cao , Maosen Li , Ya Zhang , Cewu Lu

In recent years, we have seen a significant interest in data-driven deep learning approaches for video anomaly detection, where an algorithm must determine if specific frames of a video contain abnormal behaviors. However, video anomaly…

Computer Vision and Pattern Recognition · Computer Science 2023-06-05 Armin Danesh Pazho , Ghazal Alinezhad Noghre , Babak Rahimi Ardabili , Christopher Neff , Hamed Tabkhi

Video Anomaly Detection (VAD) is a fundamental challenge in computer vision, particularly due to the open-set nature of anomalies. While recent training-free approaches utilizing Vision-Language Models (VLMs) have shown promise, they…

Computer Vision and Pattern Recognition · Computer Science 2026-04-06 Lokman Bekit , Hamza Karim , Nghia T Nguyen , Yasin Yilmaz