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We propose and experimentally demonstrate a polarization--based steganographic scheme using partially polarized vector beams. In our approach, the spatially dependent polarization structure of the optical field serves as the carrier through…

An analysis of the matrix models representing the polarimetric properties of light and material media is carried out by using the concept of the coherency matrix, which leads to the identification and definition of their corresponding…

光学 · 物理学 2020-02-18 José J. Gil

Object classification in synthetic aperture sonar (SAS) imagery is usually a data starved and class imbalanced problem. There are few objects of interest present among much benign seafloor. Despite these problems, current classification…

计算机视觉与模式识别 · 计算机科学 2018-10-16 Isaac Gerg , David Williams

A comprehensive methodology is provided for smoothing noisy, irregularly sampled data with non-Gaussian noise using smoothing splines. We demonstrate how the spline order and tension parameter can be chosen a priori from physical reasoning.…

统计方法学 · 统计学 2020-02-18 Jeffrey J. Early , Adam M. Sykulski

Polarization information of the light can provide rich cues for computer vision and scene understanding tasks, such as the type of material, pose, and shape of the objects. With the advent of new and cheap polarimetric sensors, this imaging…

计算机视觉与模式识别 · 计算机科学 2024-01-03 Joaquin Rodriguez , Lew-Fock-Chong Lew-Yan-Voon , Renato Martins , Olivier Morel

Fourier ptychographic microscopy (FPM) is a recently proposed computational imaging technique with both high resolution and wide field-of-view. In current FP experimental setup, the dark-field images with high-angle illuminations are easily…

计算机视觉与模式识别 · 计算机科学 2017-12-19 Yan Zhang , An Pan , Ming Lei , Baoli Yao

Context: Polarimetry is a very powerful tool to uncover various properties of astronomical objects that remain otherwise hidden in standard imaging or spectroscopic observations. However, the reliable measurement of the low polarization…

天体物理仪器与方法 · 物理学 2020-02-12 S. González-Gaitán , A. M. Mourão , F. Patat , J. P. Anderson , A. Cikota , K. Wiersema , A. B. Higgins , K. Silva

We consider the problem of localizing a manned, semi-autonomous, or autonomous vehicle in the environment using information coming from the vehicle's sensors, a problem known as navigation or simultaneous localization and mapping (SLAM)…

系统与控制 · 电气工程与系统科学 2020-09-24 Paul Chauchat , Axel Barrau , Silvère Bonnabel

Synthetic aperture radar (SAR) imaging traditionally requires precise knowledge of system parameters to implement focusing algorithms that transform raw data into high-resolution images. These algorithms require knowledge of SAR system…

信号处理 · 电气工程与系统科学 2025-03-19 Huizhang Yang , Zhong Liu , Jian Yang

Polarimetric imaging enables advanced vision applications such as normal estimation and de-reflection by capturing unique surface-material interactions. However, existing applications (alternatively called downstream tasks) rely on datasets…

计算机视觉与模式识别 · 计算机科学 2026-03-25 Yidong Luo , Chenggong Li , Yunfeng Song , Ping Wang , Boxin Shi , Junchao Zhang , Xin Yuan

Significant differences in optical images and Synthetic Aperture Radar (SAR) images are caused by fundamental differences in the physical principles underlying their acquisition by Earth remote sensing platforms. These differences make…

计算机视觉与模式识别 · 计算机科学 2026-02-16 Alexey Borisov , Evgeny Myasnikov , Vladislav Myasnikov

The polarization of light conveys unique information that can be exploited by crucial applications. The bulky and costly discrete optical components used in conventional polarimeters limit their broad adoption. A compact, low-cost…

应用物理 · 物理学 2019-03-27 Zhongjin Lin , Leslie Rusch , Yuxuan Chen , Wei Shi

Polarimetric imaging, a technique that captures the invisible polarization-related properties of given materials, has broad applications from fundamental physics to advanced fields such as target recognition, stress detection, biomedical…

Advancements in Sonar image capture have enabled researchers to apply sophisticated object identification algorithms in order to locate targets of interest in images such as mines. Despite progress in this field, modern sonar automatic…

计算机视觉与模式识别 · 计算机科学 2016-01-05 John McKay , Raghu Raj , Vishal Monga , Jason Isaacs

Faraday tomography allows us to map diffuse polarized synchrotron emission from our Galaxy and use it to interpret the magnetic field in the interstellar medium (ISM). We have applied Faraday tomography to 60 observations from the LOFAR…

Prosthetic vision is being applied to partially recover the retinal stimulation of visually impaired people. However, the phosphenic images produced by the implants have very limited information bandwidth due to the poor resolution and lack…

计算机视觉与模式识别 · 计算机科学 2025-01-30 Melani Sanchez-Garcia , Ruben Martinez-Cantin , Jose J. Guerrero

The $\mathcal{G}_I^0$ distribution is able to characterize different regions in monopolarized SAR imagery. It is indexed by three parameters: the number of looks (which can be estimated in the whole image), a scale parameter and a texture…

计算机视觉与模式识别 · 计算机科学 2017-01-03 José Naranjo-Torres , Juliana Gambini , Alejandro C. Frery

When a high-resolution (HR) image is degraded into a low-resolution (LR) image, the image loses some of the existing information. Consequently, multiple HR images can correspond to the LR image. Most of the existing methods do not consider…

计算机视觉与模式识别 · 计算机科学 2022-07-19 Hanbyel Cho , Yekang Lee , Jaemyung Yu , Junmo Kim

Images captured in participating media such as murky water, fog, or smoke are degraded by scattered light. Thus, the use of traditional three-dimensional (3D) reconstruction techniques in such environments is difficult. In this paper, we…

计算机视觉与模式识别 · 计算机科学 2018-04-11 Yuki Fujimura , Masaaki Iiyama , Atsushi Hashimoto , Michihiko Minoh

Faraday tomography (or rotation measure synthesis) is a procedure to convert linear polarization spectra into the Faraday dispersion function, which provides us with unique information of magneto-ionic media along the line of sight.…

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