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This paper investigates signle-antenna radar imaging with a reconfigurable intelligent surface (RIS). Configuring phase shifts in a RIS-aided radar system can be thought as synthetic aperture radar (SAR) imaging with a moving virtual…

信号处理 · 电气工程与系统科学 2024-12-19 Furkan H. Ilgac , Mounia Bouabdellah , Aydin Sezgin

Image registration is an essential step in many medical image analysis tasks. Traditional methods for image registration are primarily optimization-driven, finding the optimal deformations that maximize the similarity between two images.…

计算机视觉与模式识别 · 计算机科学 2024-10-14 Shanlin Sun , Kun Han , Chenyu You , Hao Tang , Deying Kong , Junayed Naushad , Xiangyi Yan , Haoyu Ma , Pooya Khosravi , James S. Duncan , Xiaohui Xie

In this work, we propose a self-supervised learning method for affine image registration on 3D medical images. Unlike optimisation-based methods, our affine image registration network (AIRNet) is designed to directly estimate the…

计算机视觉与模式识别 · 计算机科学 2018-10-16 Evelyn Chee , Zhenzhou Wu

Along with the improvement of radar technologies, Automatic Target Recognition (ATR) using Synthetic Aperture Radar (SAR) and Inverse SAR (ISAR) has come to be an active research area. SAR/ISAR are radar techniques to generate a…

计算机视觉与模式识别 · 计算机科学 2018-03-13 Carlos Pena-Caballero , Elifaleth Cantu , Jesus Rodriguez , Adolfo Gonzales , Osvaldo Castellanos , Angel Cantu , Megan Strait , Jae Son , Dongchul Kim

This letter presents a method of synthetic aperture radar (SAR) image despeckling aimed to preserve the detail information while suppressing speckle noise. This method combines the nonlocal self-similarity partition and a proposed modified…

计算机视觉与模式识别 · 计算机科学 2016-11-24 Chengwei Sang , Hong Sun , Quisong Xia

When adapting Simultaneous Mapping and Localization (SLAM) to real-world applications, such as autonomous vehicles, drones, and augmented reality devices, its memory footprint and computing cost are the two main factors limiting the…

机器人学 · 计算机科学 2022-11-04 Yeonsoo Park , Soohyun Bae

Frequency modulated continuous wave (FMCW) radar is emerging as a trendy radar system for synthetic aperture radar (SAR). This letter proposes a novel method for the extraction of the SAR image with the FMCW radar. The proposed method can…

信号处理 · 电气工程与系统科学 2020-10-01 Junhyeong Park , Dae-Hwan Jung , Seong-Ook Park

Buried survivor detection in the post-disaster environment by employing radar as sensor is an appealing approach. However, the implementation in the real field is challenging especially for large observation missions. Mounting the radar on…

信号处理 · 电气工程与系统科学 2020-12-22 Budiman P. A. Rohman , Muhammad Bagus Andra , Masahiko Nishimoto

We present a fast learning-based algorithm for deformable, pairwise 3D medical image registration. Current registration methods optimize an objective function independently for each pair of images, which can be time-consuming for large…

计算机视觉与模式识别 · 计算机科学 2019-03-14 Guha Balakrishnan , Amy Zhao , Mert R. Sabuncu , John Guttag , Adrian V. Dalca

We describe our implementation of a global-parameter optimizer and Square Root Information Filter (SRIF) into the asteroid-modelling software SHAPE. We compare the performance of our new optimizer with that of the existing sequential…

地球与行星天体物理 · 物理学 2015-09-23 Adam H. Greenberg , Jean-Luc Margot

This paper focuses on the joint design of transmit waveforms and receive filters for airborne multiple-input-multiple-output (MIMO) radar systems in spectrally crowded environments. The purpose is to maximize the output…

信号处理 · 电气工程与系统科学 2023-04-06 Da Li , Bo Tang , Lei Xue

3D reconstruction of a scene from Synthetic Aperture Radar (SAR) images mainly relies on interferometric measurements, which involve strict constraints on the acquisition process. These last years, progress in deep learning has…

计算机视觉与模式识别 · 计算机科学 2025-02-18 Emile Barbier--Renard , Florence Tupin , Nicolas Trouvé , Loïc Denis

Deep learning has revolutionized medical image registration by achieving unprecedented speeds, yet its clinical application is hindered by a limited ability to generalize beyond the training domain, a critical weakness given the typically…

计算机视觉与模式识别 · 计算机科学 2026-02-02 Fengting Zhang , Yue He , Qinghao Liu , Yaonan Wang , Xiang Chen , Hang Zhang

In this paper, we develop a novel super-resolution algorithm for near-field synthetic-aperture radar (SAR) under irregular scanning geometries. As fifth-generation (5G) millimeter-wave (mmWave) devices are becoming increasingly affordable…

计算机视觉与模式识别 · 计算机科学 2023-06-28 Josiah Smith , Yusef Alimam , Geetika Vedula , Murat Torlak

Image registration is a key technique in medical image analysis to estimate deformations between image pairs. A good deformation model is important for high-quality estimates. However, most existing approaches use ad-hoc deformation models…

计算机视觉与模式识别 · 计算机科学 2019-04-23 Marc Niethammer , Roland Kwitt , Francois-Xavier Vialard

A semantic feature extraction method for multitemporal high resolution aerial image registration is proposed in this paper. These features encode properties or information about temporally invariant objects such as roads and help deal with…

计算机视觉与模式识别 · 计算机科学 2019-09-20 Ananya Gupta , Yao Peng , Simon Watson , Hujun Yin

Texture is one of the most important properties of visual surface that helps in discriminating one object from another or an object from background. The self-organizing map (SOM) is an excellent tool in exploratory phase of data mining. It…

计算机视觉与模式识别 · 计算机科学 2014-08-20 Marghny H. Mohamed , Mohammed M. Abdelsamea

In this paper, an optimization model using Cauchy regularization is proposed for simultaneous SAR image reconstruction and autofocusing. A coordinate descent framework in which the desired image and the phase errors are optimized…

图像与视频处理 · 电气工程与系统科学 2020-12-18 Zi-Yao Zhang , Odysseas Pappas , Alin Achim

Aiming to enhance Face Recognition (FR) on Low-Quality (LQ) inputs, recent studies suggest incorporating synthetic LQ samples into training. Although promising, the quality factors that are considered in these works are general rather than…

计算机视觉与模式识别 · 计算机科学 2024-07-23 Mohammad Saeed Ebrahimi Saadabadi , Sahar Rahimi Malakshan , Ali Dabouei , Nasser M. Nasrabadi

A method for segmenting water bodies in optical and synthetic aperture radar (SAR) satellite images is proposed. It makes use of the textural features of the different regions in the image for segmentation. The method consists in a…

计算机视觉与模式识别 · 计算机科学 2016-04-12 Victor Manuel San Martin , Alejandra Figliola