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Using radio-frequency (RF) sensing techniques for human posture recognition has attracted growing interest due to its advantages of pervasiveness, contact-free observation, and privacy protection. Conventional RF sensing techniques are…

信号处理 · 电气工程与系统科学 2019-12-24 Jingzhi Hu , Hongliang Zhang , Boya Di , Lianlin Li , Lingyang Song , Yonghui Li , Zhu Han , H. Vincent Poor

Vision-Language Models for remote sensing have shown promising uses thanks to their extensive pretraining. However, their conventional usage in zero-shot scene classification methods still involves dividing large images into patches and…

We present NeRF-SR, a solution for high-resolution (HR) novel view synthesis with mostly low-resolution (LR) inputs. Our method is built upon Neural Radiance Fields (NeRF) that predicts per-point density and color with a multi-layer…

计算机视觉与模式识别 · 计算机科学 2022-07-22 Chen Wang , Xian Wu , Yuan-Chen Guo , Song-Hai Zhang , Yu-Wing Tai , Shi-Min Hu

A light field records numerous light rays from a real-world scene. However, capturing a dense light field by existing devices is a time-consuming process. Besides, reconstructing a large amount of light rays equivalent to multiple light…

计算机视觉与模式识别 · 计算机科学 2018-08-14 Mantang Guo , Hao Zhu , Guoqing Zhou , Qing Wang

Progressive acquisition of slowly-scanned images is desirable for drift correction and real-time visualization. Interlacing methods are common approaches to storing and transmitting data on rectilinear grids, and here we propose using them…

其他凝聚态物理 · 物理学 2022-12-08 Jacob D. Hinkle , Debangshu Mukherjee

In this paper, we present a convolution neural network based method to recover the light intensity distribution from the overlapped dispersive spectra instead of adding an extra light path to capture it directly for the first time. Then, we…

图像与视频处理 · 电气工程与系统科学 2019-07-02 XiaoYu Chen , Xu Wang , Lianfa Bai , Jing Han , Zhuang Zhao

Recently, sparsity-based algorithms are proposed for super-resolution spectrum estimation. However, to achieve adequately high resolution in real-world signal analysis, the dictionary atoms have to be close to each other in frequency,…

机器学习 · 统计学 2015-06-05 Yiyuan She , Huanghuang Li , Jiangping Wang , Dapeng Wu

This article addresses the problem of two- and higher dimensional pattern matching, i.e. the identification of instances of a template within a larger signal space, which is a form of registration. Unlike traditional correlation, we aim at…

分布式、并行与集群计算 · 计算机科学 2007-09-19 Luciano da Fontoura Costa , Erik Bollt

Optimal extraction is a key step in processing the raw images of spectra as registered by two-dimensional detector arrays to a one-dimensional format. Previously reported algorithms reconstruct models for a mean one-dimensional spatial…

天体物理仪器与方法 · 物理学 2015-06-18 M. Zechmeister , G. Anglada-Escudé , A. Reiners

We previously demonstrated near-field speckle scanning based x-ray imaging to be an easy-to-implement phase sensing method capable of providing both high sensitivity and high resolution. Yet, this performance combination could only be…

医学物理 · 物理学 2017-06-21 Sebastien Berujon , Eric Ziegler

Coherent diffraction imaging is a high-resolution imaging technique whose potential can be greatly enhanced by applying the extrapolation method presented here. We demonstrate enhancement in resolution of a non-periodical object…

A novel representation of images for image retrieval is introduced in this paper, by using a new type of feature with remarkable discriminative power. Despite the multi-scale nature of objects, most existing models perform feature…

计算机视觉与模式识别 · 计算机科学 2014-06-06 Shasha Bu , Yu-Jin Zhang

Hyperspectral (HS) images contain detailed spectral information that has proven crucial in applications like remote sensing, surveillance, and astronomy. However, because of hardware limitations of HS cameras, the captured images have low…

图像与视频处理 · 电气工程与系统科学 2021-06-15 Marija Vella , Bowen Zhang , Wei Chen , João F. C. Mota

Learning powerful feature representations for image retrieval has always been a challenging task in the field of remote sensing. Traditional methods focus on extracting low-level hand-crafted features which are not only time-consuming but…

计算机视觉与模式识别 · 计算机科学 2017-05-22 Weixun Zhou , Shawn Newsam , Congmin Li , Zhenfeng Shao

A central problem in hyperspectral image classification is obtaining high classification accuracy when using a limited amount of labelled data. In this paper we present a novel graph-based framework, which aims to tackle this problem in the…

计算机视觉与模式识别 · 计算机科学 2020-06-24 Philip Sellars , Angelica Aviles-Rivero , Carola-Bibiane Schönlieb

In this paper, we describe a strategy for training neural networks for object detection in range images obtained from one type of LiDAR sensor using labeled data from a different type of LiDAR sensor. Additionally, an efficient model for…

计算机视觉与模式识别 · 计算机科学 2019-12-06 Manuel Herzog , Klaus Dietmayer

A new method for high-sensitivity subwavelength spectromicroscopy is proposed based on the usage of a spaser (near-field laser) in the form of a scanning probe microscope tip. The high spatial resolution is defined by the tip's curvature,…

介观与纳米尺度物理 · 物理学 2012-08-17 Yuriy E. Lozovik , Igor A. Nechepurenko , Alexander V. Dorofeenko , Alexander A. Pukhov , Eugeniy S. Andrianov

In this paper, we focus on radar imaging using active sensing with a single transceiver and reconfigurable intelligent surface (RIS). RISs are arrays with tunable passive phase shifter elements that can modify the propagation channel. The…

信号处理 · 电气工程与系统科学 2023-08-14 R. S. Prasobh Sankar , Sundeep Prabhakar Chepuri

Diffraction of high-energy X-rays produced at synchrotron sources can provide rapid strain measurements, with high spatial resolution, and good penetrating power. With an uncollimated diffracted beam, through thickness averages of strain…

应用物理 · 物理学 2020-03-06 J. N. Hendriks , C. M. Wensrich , A. Wills

Single pixel imaging (SPI) is a novel technique being able to capture 2D images using a bucket detector with high signal-to-noise ratio, wide spectrum range and low cost. Conventional SPI projects random illumination patterns to randomly…

光学 · 物理学 2016-07-19 Liheng Bian , Jinli Suo , Xuemei Hu , Feng Chen , Qionghai Dai