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We present an approach for improving spatial frequency sampling in active incoherent millimeter-wave (AIM) imaging systems using frequency diversity. AIM imaging relies on active transmission of spatio-temporally incoherent signals to…

Signal Processing · Electrical Eng. & Systems 2025-03-12 Jorge R. Colon-Berrios , Jeffrey A. Nanzer

Few-shot fine-grained image classification aims to recognize subcategories with high visual similarity using only a limited number of annotated samples. Existing metric learning-based methods typically rely solely on spatial domain…

Computer Vision and Pattern Recognition · Computer Science 2026-04-17 Meijia Wang , Guochao Wang , Haozhen Chu , Bin Yao , Weichuan Zhang , Yuan Wang , Junpo Yang

Low-light image enhancement remains a challenging problem due to severe noise, color distortion, contrast degradation, and loss of structural details under insufficient illumination. Existing methods typically apply uniform enhancement…

Image and Video Processing · Electrical Eng. & Systems 2026-05-19 Bibhabasu Debnath , Sahana Ray , Sanjay Ghosh

Image restoration involves recovering high-quality images from their corrupted versions, requiring a nuanced balance between spatial details and contextual information. While certain methods address this balance, they predominantly…

Computer Vision and Pattern Recognition · Computer Science 2025-04-16 Hu Gao , Depeng Dang

In the fast-evolving field of medical image analysis, Deep Learning (DL)-based methods have achieved tremendous success. However, these methods require plaintext data for training and inference stages, raising privacy concerns, especially…

Cryptography and Security · Computer Science 2024-03-26 Mengyu Sun , Ziyuan Yang , Maosong Ran , Zhiwen Wang , Hui Yu , Yi Zhang

Purpose Medical imaging diagnosis faces challenges, including low-resolution images due to machine artifacts and patient movement. This paper presents the Frequency-Guided U-Net (GFNet), a novel approach for medical image segmentation that…

Image and Video Processing · Electrical Eng. & Systems 2024-05-03 Haytham Al Ewaidat , Youness El Brag , Ahmad Wajeeh Yousef E'layan , Ali Almakhadmeh

How to effectively explore semantic feature is vital for low-light image enhancement (LLE). Existing methods usually utilize the semantic feature that is only drawn from the output produced by high-level semantic segmentation (SS) network.…

Computer Vision and Pattern Recognition · Computer Science 2024-10-22 Mingye Ju , Chuheng Chen , Charles A. Guo , Jinshan Pan , Jinhui Tang , Dacheng Tao

This paper presents Fd-CycleGAN, an image-to-image (I2I) translation framework that enhances latent representation learning to approximate real data distributions. Building upon the foundation of CycleGAN, our approach integrates Local…

Computer Vision and Pattern Recognition · Computer Science 2025-08-06 Shivangi Nigam , Adarsh Prasad Behera , Shekhar Verma , P. Nagabhushan

Images captured under low-light conditions are often plagued by several challenges, including diminished contrast, increased noise, loss of fine details, and unnatural color reproduction. These factors can significantly hinder the…

Computer Vision and Pattern Recognition · Computer Science 2023-05-16 Miao Zhang , Yiqing Shen , Shenghui Zhong

Occupancy prediction aims to estimate the 3D spatial distribution of occupied regions along with their corresponding semantic labels. Existing vision-based methods perform well on daytime benchmarks but struggle in nighttime scenarios due…

Computer Vision and Pattern Recognition · Computer Science 2025-10-23 Yuan Wu , Zhiqiang Yan , Yigong Zhang , Xiang Li , Jian Yang

Deep neural networks have achieved remarkable success in computer vision tasks. Existing neural networks mainly operate in the spatial domain with fixed input sizes. For practical applications, images are usually large and have to be…

Computer Vision and Pattern Recognition · Computer Science 2020-04-02 Kai Xu , Minghai Qin , Fei Sun , Yuhao Wang , Yen-Kuang Chen , Fengbo Ren

Due to the emergence of powerful computing resources and large-scale annotated datasets, deep learning has seen wide applications in our daily life. However, most current methods require extensive data collection and retraining when dealing…

Computer Vision and Pattern Recognition · Computer Science 2023-04-04 Chuangguan Ye , Hongyuan Zhu , Yongbin Liao , Yanggang Zhang , Tao Chen , Jiayuan Fan

Deep learning has achieved notable performance in the denoising task of low-quality medical images and the detection task of lesions, respectively. However, existing low-quality medical image denoising approaches are disconnected from the…

Computer Vision and Pattern Recognition · Computer Science 2021-04-20 Kecheng Chen , Kun Long , Yazhou Ren , Jiayu Sun , Xiaorong Pu

Images obtained under low-light conditions will seriously affect the quality of the images. Solving the problem of poor low-light image quality can effectively improve the visual quality of images and better improve the usability of…

Computer Vision and Pattern Recognition · Computer Science 2022-09-27 Yonglong Jiang , Liangliang Li , Yuan Xue , Hongbing Ma

Imaging in low-light environments is challenging due to reduced scene radiance, which leads to elevated sensor noise and reduced color saturation. Most learning-based low-light enhancement methods rely on paired training data captured under…

Computer Vision and Pattern Recognition · Computer Science 2026-04-10 Maria Pilligua , David Serrano-Lozano , Pai Peng , Ramon Baldrich , Michael S. Brown , Javier Vazquez-Corral

Latent diffusion models (LDMs) have achieved remarkable success in a variety of image tasks, yet achieving fine-grained, disentangled control over global structures versus fine details remains challenging. This paper explores…

Computer Vision and Pattern Recognition · Computer Science 2025-05-30 Chao Huang , Susan Liang , Yunlong Tang , Jing Bi , Li Ma , Yapeng Tian , Chenliang Xu

Low-light image enhancement restores the colors and details of a single image and improves high-level visual tasks. However, restoring the lost details in the dark area is still a challenge relying only on the RGB domain. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2025-01-09 Xiangchen Yin , Zhenda Yu , Xin Gao , Xiao Sun

Increasing concerns on intelligent spectrum sensing call for efficient training and inference technologies. In this paper, we propose a novel federated learning (FL) framework, dubbed federated spectrum learning (FSL), which exploits the…

Networking and Internet Architecture · Computer Science 2022-05-24 Bo Yang , Xuelin Cao , Chongwen Huang , Chau Yuen , Marco Di Renzo , Yong Liang Guan , Dusit Niyato , Lijun Qian , Merouane Debbah

In the realm of Low-Light Image Enhancement (LLIE), existing research primarily focuses on enhancing images globally. However, many applications require local LLIE, where users are allowed to illuminate specific regions using an input mask,…

Computer Vision and Pattern Recognition · Computer Science 2023-12-01 Shihurong Yao , Yizhan Huang , Xiaogang Xu

Multi-exposure image fusion aims to generate a single high-dynamic image by integrating images with different exposures. Existing deep learning-based multi-exposure image fusion methods primarily focus on spatial domain fusion, neglecting…

Computer Vision and Pattern Recognition · Computer Science 2023-12-19 Guang Yang , Jie Li , Xinbo Gao