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Region-based image retrieval (RBIR) technique is revisited. In early attempts at RBIR in the late 90s, researchers found many ways to specify region-based queries and spatial relationships; however, the way to characterize the regions, such…

Multimedia · Computer Science 2017-09-27 Ryota Hinami , Yusuke Matsui , Shin'ichi Satoh

Reconfigurable Intelligent Surfaces (RISs) are regarded as a key technology for future wireless communications, enabling programmable radio propagation environments. However, the passive reflecting feature of RISs induces notable challenges…

Signal Processing · Electrical Eng. & Systems 2022-02-15 Liuhang Wang , Nir Shlezinger , George C. Alexandropoulos , Haiyang Zhang , Baoyun Wang , Yonina C. Elda

Fusion-based hyperspectral image (HSI) super-resolution has become increasingly prevalent for its capability to integrate high-frequency spatial information from the paired high-resolution (HR) RGB reference image. However, most of the…

Computer Vision and Pattern Recognition · Computer Science 2023-02-14 Zeqiang Lai , Ying Fu , Jun Zhang

Ultra High Resolution (UHR) remote sensing imagery (RSI) (e.g. 100,000 $\times$ 100,000 pixels or more) poses a significant challenge for current Remote Sensing Multimodal Large Language Models (RSMLLMs). If choose to resize the UHR image…

Computer Vision and Pattern Recognition · Computer Science 2025-05-29 Zilun Zhang , Haozhan Shen , Tiancheng Zhao , Zian Guan , Bin Chen , Yuhao Wang , Xu Jia , Yuxiang Cai , Yongheng Shang , Jianwei Yin

Referring image segmentation aims to segment an object referred to by natural language expression from an image. However, this task is challenging due to the distinct data properties between text and image, and the randomness introduced by…

Computer Vision and Pattern Recognition · Computer Science 2023-05-25 Yichen Yan , Xingjian He , Wenxuan Wan , Jing Liu

One-shot medical image segmentation (MIS) is crucial for medical analysis due to the burden of medical experts on manual annotation. The recent emergence of the segment anything model (SAM) has demonstrated remarkable adaptation in MIS but…

Image and Video Processing · Electrical Eng. & Systems 2025-04-30 Jia Wang , Yunan Mei , Jiarui Liu , Xin Fan

Geometric information in the normalized digital surface models (nDSM) is highly correlated with the semantic class of the land cover. Exploiting two modalities (RGB and nDSM (height)) jointly has great potential to improve the segmentation…

Computer Vision and Pattern Recognition · Computer Science 2023-05-25 Zhitong Xiong , Sining Chen , Yi Wang , Lichao Mou , Xiao Xiang Zhu

Reconfigurable intelligent surface (RIS) is a promising reflective radio technology for improving the coverage and rate of future wireless systems by reconfiguring the wireless propagation environment. The current work mainly focuses on the…

Networking and Internet Architecture · Computer Science 2021-03-24 Xuelin Cao , Bo Yang , Hongliang Zhang , Chongwen Huang , Chau Yuen , Zhu Han

Deep convolutional neural networks (DCNNs) have been used to achieve state-of-the-art performance on many computer vision tasks (e.g., object recognition, object detection, semantic segmentation) thanks to a large repository of annotated…

Computer Vision and Pattern Recognition · Computer Science 2018-05-03 Ronald Kemker , Carl Salvaggio , Christopher Kanan

The fusion of low-spatial-resolution hyperspectral images (HSIs) with high-spatial-resolution conventional images (e.g., panchromatic or RGB) has played a significant role in recent advancements in HSI super-resolution. However, this fusion…

Computer Vision and Pattern Recognition · Computer Science 2025-05-07 Usman Muhammad , Jorma Laaksonen

Intelligent reflecting surface (IRS) is envisioned to play a significant role in future wireless communication systems thanks to its powerful capability of enabling smart and reconfigurable radio environment. In this paper, we study the…

Information Theory · Computer Science 2021-02-23 Weidong Mei , Rui Zhang

Remote sensing video referring object segmentation (RS-RVOS) is challenged by weak target saliency and severe visual information truncation in dynamic scenes, making it extremely difficult to maintain discriminative target representations…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 H. Jiang , Y. Sun , Z. Dong , T. Liu , Y. Gu

Magnetic resonance imaging (MRI) reconstruction is an active inverse problem which can be addressed by conventional compressed sensing (CS) MRI algorithms that exploit the sparse nature of MRI in an iterative optimization-based manner.…

Computer Vision and Pattern Recognition · Computer Science 2019-06-13 Yuxiang Dai , Peixian Zhuang

Reconfigurable Intelligent Surfaces (RISs) are an emerging technology for future wireless communication systems, enabling improved coverage in an energy efficient manner. RISs are usually metasurfaces, constituting of two-dimensional…

Information Theory · Computer Science 2022-03-28 Konstantinos D. Katsanos , Nir Shlezinger , Mohammadreza F. Imani , George C. Alexandropoulos

In opportunistic cognitive radio networks, when the primary signal is very weak compared to the background noise, the secondary user requires long sensing time to achieve a reliable spectrum sensing performance, leading to little remaining…

Information Theory · Computer Science 2024-04-29 Jungang Ge , Ying-Chang Liang , Sumei Sun , Yonghong Zeng , Zhidong Bai

Reconfigurable intelligent surface (RIS) is considered as a promising solution for next-generation wireless communication networks due to a variety of merits, e.g., customizing the communication environment. Therefore, deploying multiple…

Signal Processing · Electrical Eng. & Systems 2023-02-09 Mengbing Liu , Chongwen Huang , Marco Di Renzo , Merouane Debbah , Chau Yuen

Medical image segmentation remains challenging due to the vast diversity of anatomical structures, imaging modalities, and segmentation tasks. While deep learning has made significant advances, current approaches struggle to generalize as…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Yunhe Gao , Di Liu , Zhuowei Li , Yunsheng Li , Dongdong Chen , Mu Zhou , Dimitris N. Metaxas

Referring Image Segmentation (RIS) is a task that segments image regions based on language expressions, requiring fine-grained alignment between two modalities. However, existing methods often struggle with multimodal misalignment and…

Computer Vision and Pattern Recognition · Computer Science 2025-09-17 Qianqi Lu , Yuxiang Xie , Jing Zhang , Shiwei Zou , Yan Chen , Xidao Luan

This paper presents a physics-based channel modeling and optimization framework for reconfigurable intelligent surface (RIS)-assisted downlink multi-user multiple-input single-output (MU-MISO) communication systems in site-specific…

Signal Processing · Electrical Eng. & Systems 2026-03-24 Ziqi Liu , Wei Yu , Sean Victor Hum

We present Region Similarity Representation Learning (ReSim), a new approach to self-supervised representation learning for localization-based tasks such as object detection and segmentation. While existing work has largely focused on…

Computer Vision and Pattern Recognition · Computer Science 2021-08-20 Tete Xiao , Colorado J Reed , Xiaolong Wang , Kurt Keutzer , Trevor Darrell