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Robots that navigate through human crowds need to be able to plan safe, efficient, and human predictable trajectories. This is a particularly challenging problem as it requires the robot to predict future human trajectories within a crowd…

Robotics · Computer Science 2018-10-31 Anirudh Vemula , Katharina Muelling , Jean Oh

Automated scene analysis has been a topic of great interest in computer vision and cognitive science. Recently, with the growth of crowd phenomena in the real world, crowded scene analysis has attracted much attention. However, the visual…

Computer Vision and Pattern Recognition · Computer Science 2015-02-09 Teng Li , Huan Chang , Meng Wang , Bingbing Ni , Richang Hong , Shuicheng Yan

An important real-world application of multi-robot systems is multi-robot patrolling (MRP), where robots must carry out the activity of going through an area at regular intervals. Motivations for MRP include the detection of anomalies that…

Robotics · Computer Science 2024-09-23 Zachary R. Madin , Jonathan Lawry , Edmund R. Hunt

We seek to improve crowd counting as we perceive limits of currently prevalent density map estimation approach on both prediction accuracy and time efficiency. We leverage multilevel pixelation of density map as it helps improve SNR of…

Computer Vision and Pattern Recognition · Computer Science 2020-08-04 Zhuojun Chen , Junhao Cheng , Yuchen Yuan , Dongping Liao , Yizhou Li , Jiancheng Lv

Among current anchor-based detectors, a positive anchor box will be intuitively assigned to the object that overlaps it the most. The assigned label to each anchor will directly determine the optimization direction of the corresponding…

Computer Vision and Pattern Recognition · Computer Science 2022-11-14 Li Xiang , He Miao , Luo Haibo , Yang Huiyuan , Xiao Jiajie

Crowdsourcing is a relatively economic and efficient solution to collect annotations from the crowd through online platforms. Answers collected from workers with different expertise may be noisy and unreliable, and the quality of annotated…

Machine Learning · Computer Science 2020-01-08 Jingzheng Tu , Guoxian Yu , Jun Wang , Carlotta Domeniconi , Xiangliang Zhang

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

The community structure of complex networks reveals both their organization and hidden relationships among their constituents. Most community detection methods currently available are not deterministic, and their results typically depend on…

Physics and Society · Physics 2012-03-29 Andrea Lancichinetti , Santo Fortunato

Recommending venues plays a critical rule in satisfying users' needs on location-based social networks. Recent studies have explored the idea of adopting collaborative ranking (CR) for recommendation, combining the idea of learning to rank…

Information Retrieval · Computer Science 2018-07-16 Mohammad Aliannejadi , Dimitrios Rafailidis , Fabio Crestani

State-of-the-art multi-object tracking~(MOT) methods follow the tracking-by-detection paradigm, where object trajectories are obtained by associating per-frame outputs of object detectors. In crowded scenes, however, detectors often fail to…

Computer Vision and Pattern Recognition · Computer Science 2021-02-03 Weihong Ren , Xinchao Wang , Jiandong Tian , Yandong Tang , Antoni B. Chan

We conducted a simple experiment in which one pedestrian passed through a crowded area and measured the body-rotational angular velocity with commercial tablets. Then, we developed a new method for predicting crowd density by applying the…

Physics and Society · Physics 2019-03-20 Koki Nagao , Daichi Yanagisawa , Katsuhiro Nishinari

In densely populated environments, socially compliant navigation is critical for autonomous robots as driving close to people is unavoidable. This manner of social navigation is challenging given the constraints of human comfort and social…

Robotics · Computer Science 2019-11-28 Xinjie Yao , Ji Zhang , Jean Oh

We consider the problem of segmenting dynamic regions in CrowdCam images, where a dynamic region is the projection of a moving 3D object on the image plane. Quite often, these regions are the most interesting parts of an image. CrowdCam…

Computer Vision and Pattern Recognition · Computer Science 2019-06-25 Nir Zarrabi , Shai Avidan , Yael Moses

It is common for CCTV operators to overlook inter- esting events taking place within the crowd due to large number of people in the crowded scene (i.e. marathon, rally). Thus, there is a dire need to automate the detection of salient crowd…

Computer Vision and Pattern Recognition · Computer Science 2014-10-15 Mei Kuan Lim , Ven Jyn Kok , Chen Change Loy , Chee Seng Chan

Current state-of-the-art crowd navigation approaches are mainly deep reinforcement learning (DRL)-based. However, DRL-based methods suffer from the issues of generalization and scalability. To overcome these challenges, we propose a method…

Robotics · Computer Science 2023-09-26 Hafiq Anas , Ong Wee Hong , Owais Ahmed Malik

Complex data in social and natural sciences find effective representation through networks, wherein quantitative and categorical information can be associated with nodes and connecting edges. The internal structure of networks can be…

Social and Information Networks · Computer Science 2024-08-07 Fabio Morea , Domenico De Stefano

In this paper, we tackle the problem of Crowd Counting, and present a crowd density estimation based approach for obtaining the crowd count. Most of the existing crowd counting approaches rely on local features for estimating the crowd…

Computer Vision and Pattern Recognition · Computer Science 2019-04-08 Viresh Ranjan , Mubarak Shah , Minh Hoai Nguyen

Social network alignment aims at aligning person identities across social networks. Embedding based models have been shown effective for the alignment where the structural proximity preserving objective is typically adopted for the model…

Social and Information Networks · Computer Science 2021-11-23 Zihan Yan , Li Liu , Xin Li , William K. Cheung , Youmin Zhang , Qun Liu , Guoyin Wang

The unsupervised anomaly localization task faces the challenge of missing anomaly sample training, detecting multiple types of anomalies, and dealing with the proportion of the area of multiple anomalies. A separate teacher-student feature…

Computer Vision and Pattern Recognition · Computer Science 2022-12-14 Chao Hu , Shengxin Lai

Recent advances in crowd counting have achieved promising results with increasingly complex convolutional neural network designs. However, due to the unpredictable domain shift, generalizing trained model to unseen scenarios is often…

Computer Vision and Pattern Recognition · Computer Science 2019-03-26 Li Wang , Yongbo Li , Xiangyang Xue