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Image registration is a fundamental task for medical imaging. Resampling of the intensity values is required during registration and better spatial resolution with finer and sharper structures can improve the resampling performance and…

Image and Video Processing · Electrical Eng. & Systems 2022-01-03 Kaicong Sun , Sven Simon

Labeled crowd scene images are expensive and scarce. To significantly reduce the requirement of the labeled images, we propose ColorCount, a novel CNN-based approach by combining self-supervised transfer colorization learning and global…

Computer Vision and Pattern Recognition · Computer Science 2021-05-21 Haoyue Bai , Song Wen , S. -H. Gary Chan

Non-visual imaging sensors are widely used in the industry for different purposes. Those sensors are more expensive than visual (RGB) sensors, and usually produce images with lower resolution. To this end, Cross-Modality Super-Resolution…

Computer Vision and Pattern Recognition · Computer Science 2021-01-25 Guy Shacht , Sharon Fogel , Dov Danon , Daniel Cohen-Or , Ilya Leizerson

Recently, counting the number of people for crowd scenes is a hot topic because of its widespread applications (e.g. video surveillance, public security). It is a difficult task in the wild: changeable environment, large-range number of…

Computer Vision and Pattern Recognition · Computer Science 2019-03-11 Qi Wang , Junyu Gao , Wei Lin , Yuan Yuan

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

Super-resolution (SR) is a technique that allows increasing the resolution of a given image. Having applications in many areas, from medical imaging to consumer electronics, several SR methods have been proposed. Currently, the best…

Computer Vision and Pattern Recognition · Computer Science 2019-12-02 Marija Vella , João F. C. Mota

Crowd counting is an important task in computer vision, which has many applications in video surveillance. Although the regression-based framework has achieved great improvements for crowd counting, how to improve the discriminative power…

Computer Vision and Pattern Recognition · Computer Science 2016-05-02 Biyun Sheng , Chunhua Shen , Guosheng Lin , Jun Li , Wankou Yang , Changyin Sun

Even without auxiliary images, single hyperspectral image super-resolution (SHSR) methods can be designed to improve the spatial resolution of hyperspectral images. However, failing to explore coherence thoroughly along bands and…

Image and Video Processing · Electrical Eng. & Systems 2025-06-25 Xufei Wang , Mingjian Zhang , Fei Ge , Jinchen Zhu , Wen Sha , Jifen Ren , Zhimeng Hou , Shouguo Zheng , ling Zheng , Shizhuang Weng

Detecting and Counting people in a human crowd from a moving drone present challenging problems that arisefrom the constant changing in the image perspective andcamera angle. In this paper, we test two different state-of-the-art approaches,…

Computer Vision and Pattern Recognition · Computer Science 2022-03-01 Javier Gonzalez-Trejo , Diego Mercado-Ravell

While RGB-Thermal crowd counting has shown promise, the paradigm faces critical limitations: RGB data raises privacy concerns in public surveillance, and multi-modal misalignment degrades fusion performance. We propose the first…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Yifei Qian , Zhongliang Guo , Chun Tong Lei , Bowen Deng , Chun Pong Lau , Xiaopeng Hong , Michael P. Pound

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

The rich textual information of large vision-language models (VLMs) combined with the powerful generative prior of pre-trained text-to-image (T2I) diffusion models has achieved impressive performance in single-image super-resolution (SISR).…

Computer Vision and Pattern Recognition · Computer Science 2025-08-25 Haodong He , Yancheng Bai , Rui Lan , Xu Duan , Lei Sun , Xiangxiang Chu , Gui-Song Xia

Single-image super-resolution (SISR) remains challenging due to the inherent difficulty of recovering fine-grained details and preserving perceptual quality from low-resolution inputs. Existing methods often rely on limited image priors,…

Computer Vision and Pattern Recognition · Computer Science 2025-03-19 Kangfu Mei , Hossein Talebi , Mojtaba Ardakani , Vishal M. Patel , Peyman Milanfar , Mauricio Delbracio

Recently the crowd counting has received more and more attention. Especially the technology of high-density environment has become an important research content, and the relevant methods for the existence of extremely dense crowd are not…

Computer Vision and Pattern Recognition · Computer Science 2021-05-25 Mengxiao Tian , Hao Guo , Chengjiang Long

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

Despite empirical risk minimization (ERM) is widely applied in the machine learning community, its performance is limited on data with spurious correlation or subpopulation that is introduced by hidden attributes. Existing literature…

Machine Learning · Computer Science 2024-12-18 Hongyu Shen , Zhizhen Zhao

Deep learning techniques have been applied in the context of image super-resolution (SR), achieving remarkable advances in terms of reconstruction performance. Existing techniques typically employ highly complex model structures which…

Image and Video Processing · Electrical Eng. & Systems 2024-11-22 Yuxuan Jiang , Jakub Nawala , Fan Zhang , David Bull

Most of the existing blind image Super-Resolution (SR) methods assume that the blur kernels are space-invariant. However, the blur involved in real applications are usually space-variant due to object motion, out-of-focus, etc., resulting…

Computer Vision and Pattern Recognition · Computer Science 2023-04-10 Xuhai Chen , Jiangning Zhang , Chao Xu , Yabiao Wang , Chengjie Wang , Yong Liu

Automatic Crowd behavior analysis can be applied to effectively help the daily transportation statistics and planning, which helps the smart city construction. As one of the most important keys, crowd counting has drawn increasing…

Computer Vision and Pattern Recognition · Computer Science 2024-03-27 Haoran Duan , Fan Wan , Rui Sun , Zeyu Wang , Varun Ojha , Yu Guan , Hubert P. H. Shum , Bingzhang Hu , Yang Long

Crowd counting typically relies on labor-intensive point-level annotations and computationally intensive backbones, restricting its scalability and deployment in resource-constrained environments. To address these challenges, this paper…

Computer Vision and Pattern Recognition · Computer Science 2025-12-30 Qiang Guo , Rubo Zhang , Bingbing Zhang , Junjie Liu , Jianqing Liu