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In this article, we propose the detection of crowd anomalies through the extraction of information in the form of time series from video format using a multimodal approach. Through pattern recognition algorithms and segmentation,…

Computer Vision and Pattern Recognition · Computer Science 2024-05-22 Alejandro Dionis-Ros , Joan Vila-Francés , Rafael Magdalena-Benedicto , Fernando Mateo , Antonio J. Serrano-López

In this paper, we propose a novel self-training approach named Crowd-SDNet that enables a typical object detector trained only with point-level annotations (i.e., objects are labeled with points) to estimate both the center points and sizes…

Computer Vision and Pattern Recognition · Computer Science 2021-02-19 Yi Wang , Junhui Hou , Xinyu Hou , Lap-Pui Chau

This paper provides an overview of the Arabic Sentiment Analysis Challenge organized by King Abdullah University of Science and Technology (KAUST). The task in this challenge is to develop machine learning models to classify a given tweet…

Computation and Language · Computer Science 2021-09-30 Hind Alamro , Manal Alshehri , Basma Alharbi , Zuhair Khayyat , Manal Kalkatawi , Inji Ibrahim Jaber , Xiangliang Zhang

Pedestrian detection in crowded scenes is a challenging problem, because occlusion happens frequently among different pedestrians. In this paper, we propose an effective and efficient detection network to hunt pedestrians in crowd scenes.…

Computer Vision and Pattern Recognition · Computer Science 2019-09-17 Cheng Chi , Shifeng Zhang , Junliang Xing , Zhen Lei , Stan Z. Li , Xudong Zou

Crowd counting is a challenging yet critical task in computer vision with applications ranging from public safety to urban planning. Recent advances using Convolutional Neural Networks (CNNs) that estimate density maps have shown…

Computer Vision and Pattern Recognition · Computer Science 2025-07-10 Abhinav Sagar

We propose a novel crowd counting approach that leverages abundantly available unlabeled crowd imagery in a learning-to-rank framework. To induce a ranking of cropped images , we use the observation that any sub-image of a crowded scene…

Computer Vision and Pattern Recognition · Computer Science 2018-03-09 Xialei Liu , Joost van de Weijer , Andrew D. Bagdanov

With the rapid development of deep learning, object detection and tracking play a vital role in today's society. Being able to identify and track all the pedestrians in the dense crowd scene with computer vision approaches is a typical…

Computer Vision and Pattern Recognition · Computer Science 2023-11-01 Yu Zhang , Huaming Chen , Wei Bao , Zhongzheng Lai , Zao Zhang , Dong Yuan

We present a novel, realtime algorithm to compute the trajectory of each pedestrian in moderately dense crowd scenes. Our formulation is based on an adaptive particle filtering scheme that uses a multi-agent motion model based on…

Computer Vision and Pattern Recognition · Computer Science 2014-02-13 Aniket Bera , Dinesh Manocha

Traffic flow prediction is crucial for urban traffic management and public safety. Its key challenges lie in how to adaptively integrate the various factors that affect the flow changes. In this paper, we propose a unified neural network…

Machine Learning · Computer Science 2018-09-05 Lingbo Liu , Ruimao Zhang , Jiefeng Peng , Guanbin Li , Bowen Du , Liang Lin

Crowd counting problem aims to count the number of objects within an image or a frame in the videos and is usually solved by estimating the density map generated from the object location annotations. The values in the density map, by…

Computer Vision and Pattern Recognition · Computer Science 2019-06-21 Shengqin Jiang , Xiaobo Lu , Yinjie Lei , Lingqiao Liu

Monitoring the dynamics of traffic in major corridors can provide invaluable insight for traffic planning purposes. An important requirement for this monitoring is the availability of methods to automatically detect major traffic events and…

Computer Vision and Pattern Recognition · Computer Science 2020-07-13 Sanaz Aliari , Kaveh F. Sadabadi

Crowd trajectory prediction plays a crucial role in public safety and management, where it can help prevent disasters such as stampedes. Recent works address the problem by predicting individual trajectories and considering surrounding…

Artificial Intelligence · Computer Science 2026-03-20 Antonius Bima Murti Wijaya , Paul Henderson , Marwa Mahmoud

Semi-supervised approaches for crowd counting attract attention, as the fully supervised paradigm is expensive and laborious due to its request for a large number of images of dense crowd scenarios and their annotations. This paper proposes…

Computer Vision and Pattern Recognition · Computer Science 2021-08-03 Yanda Meng , Hongrun Zhang , Yitian Zhao , Xiaoyun Yang , Xuesheng Qian , Xiaowei Huang , Yalin Zheng

In this paper, we propose a simple yet effective crowd counting and localization network named SCALNet. Unlike most existing works that separate the counting and localization tasks, we consider those tasks as a pixel-wise dense prediction…

Computer Vision and Pattern Recognition · Computer Science 2021-04-27 Yi Wang , Xinyu Hou , Lap-Pui Chau

In this paper, we aim at tackling the problem of crowd counting in extremely high-density scenes, which contain hundreds, or even thousands of people. We begin by a comprehensive analysis of the most widely used density map-based methods,…

Computer Vision and Pattern Recognition · Computer Science 2018-01-23 Hanhui Li , Xiangjian He , Hefeng Wu , Saeed Amirgholipour Kasmani , Ruomei Wang , Xiaonan Luo , Liang Lin

Safe and computationally efficient local planning for mobile robots in dense, unstructured human crowds remains a fundamental challenge. Moreover, ensuring that robot trajectories are similar to how a human moves will increase the…

Single image-based crowd counting has recently witnessed increased focus, but many leading methods are far from optimal, especially in highly congested scenes. In this paper, we present Hierarchical Attention-based Crowd Counting Network…

Computer Vision and Pattern Recognition · Computer Science 2019-10-23 Vishwanath A. Sindagi , Vishal M. Patel

Accurate crowd detection (CD) is critical for public safety and historical pattern analysis, yet existing methods relying on ground and aerial imagery suffer from limited spatio-temporal coverage. The development of very-fine-resolution…

Computer Vision and Pattern Recognition · Computer Science 2025-04-29 Tong Xiao , Qunming Wang , Ping Lu , Tenghai Huang , Xiaohua Tong , Peter M. Atkinson

Semi-supervised crowd counting is crucial for addressing the high annotation costs of densely populated scenes. Although several methods based on pseudo-labeling have been proposed, it remains challenging to effectively and accurately…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Maochen Yang , Zekun Li , Jian Zhang , Lei Qi , Yinghuan Shi

Modeling and simulation approaches that express crowd movement with mathematical models are widely and actively studied to understand crowd movement and resolve crowd accidents. Existing literature on crowd modeling focuses on only the…

Multiagent Systems · Computer Science 2023-02-27 Ryo Nishida , Masaki Onishi , Koichi Hashimoto