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Visual localization is the problem of estimating the position and orientation from which a given image (or a sequence of images) is taken in a known scene. It is an important part of a wide range of computer vision and robotics…

Computer Vision and Pattern Recognition · Computer Science 2021-09-13 Ara Jafarzadeh , Manuel Lopez Antequera , Pau Gargallo , Yubin Kuang , Carl Toft , Fredrik Kahl , Torsten Sattler

Forecasting human activities observed in videos is a long-standing challenge in computer vision, which leads to various real-world applications such as mobile robots, autonomous driving, and assistive systems. In this work, we present a new…

Computer Vision and Pattern Recognition · Computer Science 2019-11-25 Hiroaki Minoura , Ryo Yonetani , Mai Nishimura , Yoshitaka Ushiku

Drones, or general UAVs, equipped with cameras have been fast deployed with a wide range of applications, including agriculture, aerial photography, and surveillance. Consequently, automatic understanding of visual data collected from…

Computer Vision and Pattern Recognition · Computer Science 2021-10-05 Pengfei Zhu , Longyin Wen , Dawei Du , Xiao Bian , Heng Fan , Qinghua Hu , Haibin Ling

Over the past few years, researchers have presented many different applications for convolutional neural networks, including those for the detection and recognition of objects from images. The desire to understand our own nature has always…

Computer Vision and Pattern Recognition · Computer Science 2019-11-06 Gergely Csönde , Yoshihide Sekimoto , Takehiro Kashiyama

Crowd counting aims to count the number of instantaneous people in a crowded space, and many promising solutions have been proposed for single image crowd counting. With the ubiquitous video capture devices in public safety field, how to…

Computer Vision and Pattern Recognition · Computer Science 2022-02-15 Xingjiao Wu , Baohan Xu , Yingbin Zheng , Hao Ye , Jing Yang , Liang He

In this paper, we address the challenging problem of crowd counting in congested scenes. Specifically, we present Inverse Attention Guided Deep Crowd Counting Network (IA-DCCN) that efficiently infuses segmentation information through an…

Computer Vision and Pattern Recognition · Computer Science 2019-07-23 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

State-of-the-art methods for counting people in crowded scenes rely on deep networks to estimate crowd density in the image plane. While useful for this purpose, this image-plane density has no immediate physical meaning because it is…

Computer Vision and Pattern Recognition · Computer Science 2019-07-19 Weizhe Liu , Krzysztof Lis , Mathieu Salzmann , Pascal Fua

Crowd monitoring and analysis in mass events are highly important technologies to support the security of attending persons. Proposed methods based on terrestrial or airborne image/video data often fail in achieving sufficiently accurate…

Computer Vision and Pattern Recognition · Computer Science 2013-04-24 Roland Perko , Thomas Schnabel , Gerald Fritz , Alexander Almer , Lucas Paletta

It is important to monitor and analyze crowd events for the sake of city safety. In an EDOF (extended depth of field) image with a crowded scene, the distribution of people is highly imbalanced. People far away from the camera look much…

Computer Vision and Pattern Recognition · Computer Science 2018-04-24 Mingliang Xu , Zhaoyang Ge , Xiaoheng Jiang , Gaoge Cui , Pei Lv , Bing Zhou , Changsheng Xu

Compared with single image based crowd counting, video provides the spatial-temporal information of the crowd that would help improve the robustness of crowd counting. But translation, rotation and scaling of people lead to the change of…

Computer Vision and Pattern Recognition · Computer Science 2019-07-19 Yanyan Fang , Biyun Zhan , Wandi Cai , Shenghua Gao , Bo Hu

Crowd counting problem that counts the number of people in an image has been extensively studied in recent years. In this paper, we introduce a new variant of crowd counting problem, namely "Categorized Crowd Counting", that counts the…

Computer Vision and Pattern Recognition · Computer Science 2019-12-13 Sarkar Snigdha Sarathi Das , Syed Md. Mukit Rashid , Mohammed Eunus Ali

Detecting anomalies in crowded scenes is challenging due to severe inter-person occlusions and highly dynamic, context-dependent motion patterns. Existing approaches often struggle to adapt to varying crowd densities and lack interpretable…

Computer Vision and Pattern Recognition · Computer Science 2025-10-22 Fatima AlGhamdi , Omar Alharbi , Abdullah Aldwyish , Raied Aljadaany , Muhammad Kamran J Khan , Huda Alamri

Semantic segmentation of drone images is critical for various aerial vision tasks as it provides essential semantic details to understand scenes on the ground. Ensuring high accuracy of semantic segmentation models for drones requires…

Computer Vision and Pattern Recognition · Computer Science 2025-04-01 Wenxiao Cai , Ke Jin , Jinyan Hou , Cong Guo , Letian Wu , Wankou Yang

Crowd counting aims to predict the number of people and generate the density map in the image. There are many challenges, including varying head scales, the diversity of crowd distribution across images and cluttered backgrounds. In this…

Computer Vision and Pattern Recognition · Computer Science 2021-04-07 Xin Wang , Yang Zhao , Tangwen Yang , Qiuqi Ruan

Most existing video tasks related to "human" focus on the segmentation of salient humans, ignoring the unspecified others in the video. Few studies have focused on segmenting and tracking all humans in a complex video, including pedestrians…

Computer Vision and Pattern Recognition · Computer Science 2021-08-17 Ran Yu , Chenyu Tian , Weihao Xia , Xinyuan Zhao , Haoqian Wang , Yujiu Yang

Visual counting, a task that aims to estimate the number of objects from an image/video, is an open-set problem by nature, i.e., the number of population can vary in [0, inf) in theory. However, collected data and labeled instances are…

Computer Vision and Pattern Recognition · Computer Science 2020-06-02 Haipeng Xiong , Hao Lu , Chengxin Liu , Liang Liu , Chunhua Shen , Zhiguo Cao

Recent deep learning-based multi-view people detection (MVD) methods have shown promising results on existing datasets. However, current methods are mainly trained and evaluated on small, single scenes with a limited number of multi-view…

Computer Vision and Pattern Recognition · Computer Science 2024-05-31 Qi Zhang , Yunfei Gong , Daijie Chen , Antoni B. Chan , Hui Huang

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…

Computer Vision and Pattern Recognition · Computer Science 2026-04-03 Sebastian-Ion Nae , Radu Moldoveanu , Alexandra Stefania Ghita , Adina Magda Florea

Despite the dynamic development of computer vision algorithms, the implementation of perception and control systems for autonomous vehicles such as drones and self-driving cars still poses many challenges. A video stream captured by…

Computer Vision and Pattern Recognition · Computer Science 2023-11-14 Piotr Wzorek , Tomasz Kryjak