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This paper focuses on detecting social, physical-world events from photos posted on social media sites. The problem is important: cheap media capture devices have significantly increased the number of photos shared on these sites. The main…

社会与信息网络 · 计算机科学 2015-03-20 Yanxiang Wang , Hari Sundaram , Lexing Xie

Anomaly detection in spatiotemporal data is a challenging problem encountered in a variety of applications including hyperspectral imaging, video surveillance and urban traffic monitoring. In the case of urban traffic data, anomalies refer…

信号处理 · 电气工程与系统科学 2021-03-02 Seyyid Emre Sofuoglu , Selin Aviyente

Modern crowd theories agree that collective behavior is the result of the underlying interactions among small groups of individuals. In this work, we propose a novel algorithm for detecting social groups in crowds by means of a Correlation…

计算机视觉与模式识别 · 计算机科学 2015-08-07 Francesco Solera , Simone Calderara , Rita Cucchiara

Real-time video surveillance, through CCTV camera systems has become essential for ensuring public safety which is a priority today. Although CCTV cameras help a lot in increasing security, these systems require constant human interaction…

计算机视觉与模式识别 · 计算机科学 2023-02-23 Labib Ahmed Siddique , Rabita Junhai , Tanzim Reza , Salman Sayeed Khan , Tanvir Rahman

In real-world crowd counting applications, the crowd densities vary greatly in spatial and temporal domains. A detection based counting method will estimate crowds accurately in low density scenes, while its reliability in congested areas…

计算机视觉与模式识别 · 计算机科学 2018-03-08 Jiang Liu , Chenqiang Gao , Deyu Meng , Alexander G. Hauptmann

Depression is a prevalent global mental health disorder, characterised by persistent low mood and anhedonia. However, it remains underdiagnosed because current diagnostic methods depend heavily on subjective clinical assessments. To enable…

计算机视觉与模式识别 · 计算机科学 2025-11-24 Sejuti Rahman , Swakshar Deb , MD. Sameer Iqbal Chowdhury , MD. Jubair Ahmed Sourov , Mohammad Shamsuddin

We present an improved clustering based, unsupervised anomalous trajectory detection algorithm for crowded scenes. The proposed work is based on four major steps, namely, extraction of trajectories from crowded scene video, extraction of…

计算机视觉与模式识别 · 计算机科学 2019-07-04 Deepan Das , Deepak Mishra

Crowd evacuation simulation is critical for enhancing public safety, and demanded for realistic virtual environments. Current mainstream evacuation models overlook the complex human behaviors that occur during evacuation, such as pedestrian…

计算机视觉与模式识别 · 计算机科学 2025-10-07 Xiaolin Liu , Tianyi Zhou , Hongbo Kang , Jian Ma , Ziwen Wang , Jing Huang , Wenguo Weng , Yu-Kun Lai , Kun Li

Cyber-physical systems for robotic surgery have enabled minimally invasive procedures with increased precision and shorter hospitalization. However, with increasing complexity and connectivity of software and major involvement of human…

机器人学 · 计算机科学 2020-06-19 Mohammad Samin Yasar , Homa Alemzadeh

Abnormal driving behaviour is one of the leading cause of terrible traffic accidents endangering human life. Therefore, study on driving behaviour surveillance has become essential to traffic security and public management. In this paper,…

计算机视觉与模式识别 · 计算机科学 2018-12-04 Yaocong Hu , MingQi Lu , Xiaobo Lu

Computer vision techniques have been used to produce accurate and generic crowd count estimators in recent years. Due to severe occlusions, appearance variations, perspective distortions and illumination conditions, crowd counting is a very…

计算机视觉与模式识别 · 计算机科学 2017-10-27 Haiyan Yao , Kang Han , Wanggen Wan , Li Hou

In this paper, we are presenting a rotation variant Oriented Texture Curve (OTC) descriptor based mean shift algorithm for tracking an object in an unstructured crowd scene. The proposed algorithm works by first obtaining the OTC features…

计算机视觉与模式识别 · 计算机科学 2015-10-05 Ishan Jindal , Shanmuganathan Raman

In this paper we propose a new framework to categorize social interactions in egocentric videos, we named InteractionGCN. Our method extracts patterns of relational and non-relational cues at the frame level and uses them to build a…

计算机视觉与模式识别 · 计算机科学 2021-06-09 Simone Felicioni , Mariella Dimiccoli

Accurate traffic prediction is essential for Intelligent Transportation Systems (ITS), yet current methods struggle with the inherent complexity and non-linearity of traffic dynamics, making it difficult to integrate spatial and temporal…

机器学习 · 计算机科学 2025-07-02 Ruiyuan Jiang , Dongyao Jia , Eng Gee Lim , Pengfei Fan , Yuli Zhang , Shangbo Wang

The simulation of the dynamical behavior of pedestrians and crowds in spatial structures is a consolidated research and application context that still presents challenges for researchers in different fields and disciplines. Despite…

多智能体系统 · 计算机科学 2016-08-18 Giuseppe Vizzari , Stefania Bandini

The rapid development of Deepfake technology has enabled the generation of highly realistic manipulated videos, posing severe social and ethical challenges. Existing Deepfake detection methods primarily focused on either spatial or temporal…

计算机视觉与模式识别 · 计算机科学 2025-01-24 Jiaxin Chen , Miao Hu , Dengyong Zhang , Jingyang Meng

Understanding human activity is a crucial aspect of developing intelligent robots, particularly in the domain of human-robot collaboration. Nevertheless, existing systems encounter challenges such as over-segmentation, attributed to errors…

机器人学 · 计算机科学 2024-10-11 Hao Xing , Darius Burschka

Region of Interest (ROI) crowd counting can be formulated as a regression problem of learning a mapping from an image or a video frame to a crowd density map. Recently, convolutional neural network (CNN) models have achieved promising…

计算机视觉与模式识别 · 计算机科学 2017-07-26 Feng Xiong , Xingjian Shi , Dit-Yan Yeung

This study enhances a crowd density estimation algorithm originally designed for image-based analysis by adapting it for video-based scenarios. The proposed method integrates a denoising probabilistic model that utilizes diffusion processes…

计算机视觉与模式识别 · 计算机科学 2025-11-14 Balachandra Devarangadi Sunil , Rakshith Venkatesh , Shantanu Todmal

Understanding human behaviour in crowded indoor environments is central to surveillance, smart buildings, and human-robot interaction, yet existing datasets rarely capture real-world indoor complexity at scale. We introduce IndoorCrowd, a…

计算机视觉与模式识别 · 计算机科学 2026-04-03 Sebastian-Ion Nae , Radu Moldoveanu , Alexandra Stefania Ghita , Adina Magda Florea