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Crowd counting is a challenging problem due to the scene complexity and scale variation. Although deep learning has achieved great improvement in crowd counting, scene complexity affects the judgement of these methods and they usually…

Computer Vision and Pattern Recognition · Computer Science 2022-04-18 Jiwei Chen , Wen Su , Zengfu Wang

In visual surveillance systems, it is necessary to recognize the behavior of people handling objects such as a phone, a cup, or a plastic bag. In this paper, to address this problem, we propose a new framework for recognizing object-related…

Computer Vision and Pattern Recognition · Computer Science 2023-12-29 Sunoh Kim , Kimin Yun , Jongyoul Park , Jin Young Choi

Counting people in dense crowds is a demanding task even for humans. This is primarily due to the large variability in appearance of people. Often people are only seen as a bunch of blobs. Occlusions, pose variations and background clutter…

Computer Vision and Pattern Recognition · Computer Science 2018-07-30 Deepak Babu Sam , R. Venkatesh Babu

For pedestrians moving without spatial constraints, extensive research has been devoted to develop methods of density estimation. In this paper we present a new approach based on Voronoi cells, offering a means to estimate density for…

Physics and Society · Physics 2024-11-28 Pratik Mullick , Cécile Appert-Rolland , William H. Warren , Julien Pettré

The increasing pervasiveness of object tracking technologies leads to huge volumes of spatiotemporal data collected in the form of trajectory streams. The discovery of useful group patterns from moving objects' movement behaviours in…

Databases · Computer Science 2022-08-15 Yanwei Yu , Ruoshan Lan , Lei Cao , Peng Song , Yingjie Wang

This paper proposes a simple yet effective method for human action recognition in video. The proposed method separately extracts local appearance and motion features using state-of-the-art three-dimensional convolutional neural networks…

Computer Vision and Pattern Recognition · Computer Science 2020-02-24 David Torpey , Turgay Celik

Detecting carried objects is one of the requirements for developing systems to reason about activities involving people and objects. We present an approach to detect carried objects from a single video frame with a novel method that…

Computer Vision and Pattern Recognition · Computer Science 2018-01-12 Farnoosh Ghadiri , Robert Bergevin , Guillaume-Alexandre Bilodeau

Crowd counting is an important problem in computer vision due to its wide range of applications in image understanding. Currently, this problem is typically addressed using deep learning approaches, such as Convolutional Neural Networks…

Computer Vision and Pattern Recognition · Computer Science 2024-01-26 Zhen Wang , Yuelei Li , Jia Wan , Nuno Vasconcelos

We focus on robot navigation in crowded environments. The challenge of predicting the motion of a crowd around a robot makes it hard to ensure human safety and comfort. Recent approaches often employ end-to-end techniques for robot control…

Forecasting the flow of crowds is of great importance to traffic management and public safety, yet a very challenging task affected by many complex factors, such as inter-region traffic, events and weather. In this paper, we propose a…

Artificial Intelligence · Computer Science 2017-01-11 Junbo Zhang , Yu Zheng , Dekang Qi

In this paper, we propose a method called Convolutional Neural Network-Markov Random Field (CNN-MRF) to estimate the crowd count in a still image. We first divide the dense crowd visible image into overlapping patches and then use a deep…

Computer Vision and Pattern Recognition · Computer Science 2017-10-18 Kang Han , Wanggen Wan , Haiyan Yao , Li Hou

The goal of video-based person re-identification is to match two input videos, so that the distance of the two videos is small if two videos contain the same person. A common approach for person re-identification is to first extract image…

Computer Vision and Pattern Recognition · Computer Science 2019-04-11 Tanzila Rahman , Mrigank Rochan , Yang Wang

In this work, we propose a novel crowd counting network that progressively generates crowd density maps via residual error estimation. The proposed method uses VGG16 as the backbone network and employs density map generated by the final…

Computer Vision and Pattern Recognition · Computer Science 2019-10-29 Vishwanath A. Sindagi , Rajeev Yasarla , Vishal M. Patel

The estimation of crowd count in images has a wide range of applications such as video surveillance, traffic monitoring, public safety and urban planning. Recently, the convolutional neural network (CNN) based approaches have been shown to…

Computer Vision and Pattern Recognition · Computer Science 2018-05-16 Xinghao Ding , Zhirui Lin , Fujin He , Yu Wang , Yue Huang

The rapid development of deep learning and generative AI technologies has profoundly transformed the digital contact landscape, creating realistic Deepfake that poses substantial challenges to public trust and digital media integrity. This…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Ying Xu , Marius Pedersen , Kiran Raja

Counting and tracking dense crowds in large-scale scenes is a highly practical yet challenging problem. Existing methods mostly rely on fixed-camera datasets with limited scene coverage, making them inadequate for crowd analysis in…

Computer Vision and Pattern Recognition · Computer Science 2026-05-29 Yaowu Fan , Jia Wan , Tao Han , Andy J. Ma , Wanli Ouyang , Antoni B. Chan

Supervised crowd counting relies heavily on costly manual labeling, which is difficult and expensive, especially in dense scenes. To alleviate the problem, we propose a novel unsupervised framework for crowd counting, named CrowdCLIP. The…

Computer Vision and Pattern Recognition · Computer Science 2023-04-11 Dingkang Liang , Jiahao Xie , Zhikang Zou , Xiaoqing Ye , Wei Xu , Xiang Bai

Crowd counting is to estimate the number of objects (e.g., people or vehicles) in an image of unconstrained congested scenes. Designing a general crowd counting algorithm applicable to a wide range of crowd images is challenging, mainly due…

Computer Vision and Pattern Recognition · Computer Science 2019-09-10 Haoyue Bai , Song Wen , S. -H. Gary Chan

Most of the crowd abnormal event detection methods rely on complex hand-crafted features to represent the crowd motion and appearance. Convolutional Neural Networks (CNN) have shown to be a powerful tool with excellent representational…

Computer Vision and Pattern Recognition · Computer Science 2018-01-30 Mahdyar Ravanbakhsh , Moin Nabi , Hossein Mousavi , Enver Sangineto , Nicu Sebe

This paper proposes a novel approach for crowd counting in low to high density scenarios in static images. Current approaches cannot handle huge crowd diversity well and thus perform poorly in extreme cases, where the crowd density in…

Computer Vision and Pattern Recognition · Computer Science 2020-02-28 Usman Sajid , Hasan Sajid , Hongcheng Wang , Guanghui Wang