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Polarization plays an important role in various time-domain astrophysics to understand the magnetic fields, geometry, and environments of spatially unresolved variable sources. In this paper we present the results of laboratory and on-sky…

天体物理仪器与方法 · 物理学 2020-04-29 Manisha Shrestha , Iain A. Steele , Andrez S. Piascik , Helen Jermak , Robert J. Smith , Chris M. Copperwheat

We present a novel way of wavefront sensing using a commercially available, continuous-wave time-of-flight camera with QVGA-resolution. This CMOS phase camera is capable of sensing externally modulated light sources with frequencies up to…

仪器与探测器 · 物理学 2021-08-18 Erik Muñiz , Varun Srivastava , Subham Vidyant , Stefan W. Ballmer

We report on the absolute calibration of a CCD camera by exploiting quantum correlation. This novel method exploits a certain number of spatial pairwise quantum correlated modes produced by spontaneous parametric-down-conversion. We develop…

量子物理 · 物理学 2014-10-14 I. Ruo-Berchera , A. Meda , I. P. Degiovanni , G. Brida , M. L. Rastello , M. Genovese

In multimedia understanding tasks, corrupted samples pose a critical challenge, because when fed to machine learning models they lead to performance degradation. In the past, three groups of approaches have been proposed to handle noisy…

计算机视觉与模式识别 · 计算机科学 2024-03-01 Francesco Barbato , Umberto Michieli , Mehmet Kerim Yucel , Pietro Zanuttigh , Mete Ozay

Vision-based localization is a cost-effective and thus attractive solution for many intelligent mobile platforms. However, its accuracy and especially robustness still suffer from low illumination conditions, illumination changes, and…

机器人学 · 计算机科学 2024-01-17 Yi-Fan Zuo , Wanting Xu , Xia Wang , Yifu Wang , Laurent Kneip

In contrast to non-medical image denoising, where enhancing image clarity is the primary goal, medical image denoising warrants preservation of crucial features without introduction of new artifacts. However, many denoising methods that…

图像与视频处理 · 电气工程与系统科学 2024-12-02 Md. Touhidul Islam , Md. Abtahi M. Chowdhury , Sumaiya Salekin , Aye T. Maung , Akil A. Taki , Hafiz Imtiaz

Nowadays, long distance optical fibre transmission systems use polarization diversity multiplexed signals to enhance transmission performance. Distributed acoustic sensors (DAS) use the same propagation medium ie. single mode optical fibre,…

信号处理 · 电气工程与系统科学 2020-07-03 Sterenn Guerrier , Christian Dorize , Elie Awwad , Jérémie Renaudier

CMOS Pixel Sensors tend to become relevant for a growing spectrum of charged particle detection instruments. This comes mainly from their high granularity and low material budget. However, several potential applications require a higher…

Scientific CMOS image sensors are a modern alternative for a typical CCD detectors, as they offer both low read-out noise, large sensitive area, and high frame rates. All these makes them promising devices for a modern wide-field sky…

天体物理仪器与方法 · 物理学 2021-01-06 Sergey Karpov , Armelle Bajat , Asen Christov , Michael Prouza , Grigory Beskin

Object detection is a fundamental problem in computer vision, aiming at locating and classifying objects in image. Although current devices can easily take very high-resolution images, current approaches of object detection seldom consider…

计算机视觉与模式识别 · 计算机科学 2023-03-03 Jinyan Liu , Jie Chen

To obtain the best resolution for any measurement there is an ever-present challenge to achieve maximal differentiation between signal and noise over as fine of sampling dimensions as possible. In diffraction science these issues are…

仪器与探测器 · 物理学 2023-10-23 James Weng , Niklas B. Thompson , Christopher Folmar , James D. Martin , Christina Hoffman

We present our image processing system for the reduction of optical imaging data from multi-chip cameras. In the framework of the Garching Bonn Deep Survey (GaBoDS; Schirmer et al. 2003) consisting of about 20 square degrees of high-quality…

This paper explores the potential of AstroPix, a project to develop Complementary Metal Oxide Semiconductor (CMOS) pixels for the next generation of space-based high-energy astrophysics experiments. Multimessenger astrophysics is a rapidly…

A cluster imaging technique for Transmission Electron Microscopy with a direct detection CMOS pixel sensor is presented. Charge centre-of-gravity reconstruction for individual electron clusters improves the spatial resolution and thus the…

仪器与探测器 · 物理学 2009-10-29 Marco Battaglia , Devis Contarato , Peter Denes , Piero Giubilato

We present a new approach to component separation in multifrequency CMB experiments by formulating the problem as that of partitioning the sky into pixel clusters such that within each pixel cluster the foregrounds have similar spectrum,…

宇宙学与河外天体物理 · 物理学 2019-03-18 Rishi Khatri

We consider the problem of removing and replacing clouds in satellite image sequences, which has a wide range of applications in remote sensing. Our approach first detects and removes the cloud-contaminated part of the image sequences. It…

计算机视觉与模式识别 · 计算机科学 2016-04-14 Jialei Wang , Peder A. Olsen , Andrew R. Conn , Aurelie C. Lozano

The large size of the time ordered data of cosmic microwave background experiments presents challenges for mission planning and data analysis. These issues are particularly significant for Antarctica- and space-based experiments, which…

天体物理仪器与方法 · 物理学 2019-08-05 L. Balkenhol , C. L. Reichardt

The upgrade to the High Luminosity Large Hadron Collider will pose unprecedented challenges to the tracking systems of all experiments. Recent advancement of active pixel detectors designed in CMOS processes provide attractive alternatives…

仪器与探测器 · 物理学 2017-09-13 T. Bisanz , J. Große-Knetter , A. Quadt , J. Rieger , J. Weingarten

Pixel sensors based on commercial high-voltage CMOS processes are an exciting technology that is considered as an option for the outer layer of the ATLAS inner tracker upgrade at the High Luminosity LHC. Here, charged particles are detected…