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Integral field spectroscopy (IFS) is a powerful tool for understanding the formation of galaxies across cosmic history. We present the observing strategy and first results of MSA-3D, a novel JWST program using multi-object spectroscopy in a…

The ill-posed problem of phase retrieval in optics, using one or more intensity measurements, has a multitude of applications using electromagnetic or matter waves. Many phase retrieval algorithms are computed on pixel arrays using discrete…

Image and Video Processing · Electrical Eng. & Systems 2022-09-21 J. A. Pollock , K. S. Morgan , L. C. P. Croton , M. K. Croughan , G. Ruben , N. Yagi , H. Sekiguchi , M. J. Kitchen

We present results of inflight calibration of the point spread function (PSF) of the Soft X-ray Telescope (SXT-S) that focuses X-ray onto the pixel array of the Soft X-ray Spectrometer system (SXS). We make a full array image of a…

In preparation for James Webb Space Telescope (JWST), a set of cross calibration programs with HST and Spitzer for suitable primary photometric standards and astrometric fields were developed. NICMOS/HST and IRAC/Spitzer photometry…

Astrophysics · Physics 2007-05-23 Rosa I. Diaz-Miller

Recent ground-based deep observations of the Universe have discovered large populations of massive quiescent galaxies at z~3-5. With the launch of the James Webb Space Telescope (JWST), the on-board NIRSpec instrument will provide…

Astrophysics of Galaxies · Physics 2023-06-22 Themiya Nanayakkara , James Esdaile , Karl Glazebrook , Juan M. Espejo Salcedo , Mark Durre , Colin Jacobs

The scope of this paper is to compare the catalog extraction performances obtained using the new combination of SExtractor with PSFEx, against the more traditional and diffuse application of DAOPHOT with ALLSTAR; therefore, the paper may…

Instrumentation and Methods for Astrophysics · Physics 2015-06-12 M. Annunziatella , A. Mercurio , M. Brescia , S. Cavuoti , G. Longo

A reliable extraction of filament data from microscopic images is of high interest in the analysis of acto-myosin structures as early morphological markers in mechanically guided differentiation of human mesenchymal stem cells and the…

Computer Vision and Pattern Recognition · Computer Science 2015-07-15 Benjamin Eltzner , Carina Wollnik , Carsten Gottschlich , Stephan Huckemann , Florian Rehfeldt

Galaxy imaging surveys observe a vast number of objects that are affected by the instrument's Point Spread Function (PSF). Weak lensing missions, in particular, aim at measuring the shape of galaxies, and PSF effects represent an important…

Instrumentation and Methods for Astrophysics · Physics 2021-02-03 T. Liaudat , J. Bonnin , J. -L. Starck , M. A. Schmitz , A. Guinot , M. Kilbinger , S. D. J. Gwyn

Extracting stellar fundamental parameters from SPectro-Interferometric (SPI) data requires reliable estimates of observables and with robust uncertainties (visibility, triple product, phase closure). A number of fine calibration procedures…

Instrumentation and Methods for Astrophysics · Physics 2015-06-15 Pierre Cruzalèbes , Yves Rabbia , Alain Jorissen , Alain Spang , Stéphane Sacuto , Ester Pasquato , Andrea Chiavassa , Olivier Chesneau , Patrick Fréville

Precise localization of polyp is crucial for early cancer screening in gastrointestinal endoscopy. Videos given by endoscopy bring both richer contextual information as well as more challenges than still images. The camera-moving situation,…

Computer Vision and Pattern Recognition · Computer Science 2021-07-09 Lingyun Wu , Zhiqiang Hu , Yuanfeng Ji , Ping Luo , Shaoting Zhang

Scanning Kelvin probe microscopy (SKPM) is a powerful technique for investigating the electrostatic properties of material surfaces, enabling the imaging of variations in work function, topology, surface charge density, or combinations…

Applied Physics · Physics 2024-07-26 Isaac C. D. Lenton , Felix Pertl , Lubuna Shafeek , Scott R. Waitukaitis

Small-angle X-ray and neutron scattering experiments are used in many fields of the life sciences and condensed matter research to obtain answers to questions about the shape and size of nano-sized structures, typically in the range of 1 to…

Data Analysis, Statistics and Probability · Physics 2015-06-10 Ingo Breßler , Joachim Kohlbrecher , Andreas F. Thünemann

High-quality panoramic images with a Field of View (FoV) of 360{\deg} are essential for contemporary panoramic computer vision tasks. However, conventional imaging systems come with sophisticated lens designs and heavy optical components.…

Computer Vision and Pattern Recognition · Computer Science 2024-07-08 Qi Jiang , Shaohua Gao , Yao Gao , Kailun Yang , Zhonghua Yi , Hao Shi , Lei Sun , Kaiwei Wang

We present a new analysis of the potential power of deep, near-infrared, imaging surveys with the James Webb Space Telescope (JWST) to improve our knowledge of galaxy evolution. In this work we properly simulate what can be achieved with…

Astrophysics of Galaxies · Physics 2019-05-01 T. W. Kemp , J. S. Dunlop , R. J. McLure , C. Schreiber , A. C. Carnall , F. Cullen

We utilise the unprecedented depth and resolution of recent early-release science (ERS) JWST observations to define the near-infrared counterparts of sub-millimetre selected galaxies (SMGs). We identify 45 SCUBA-2 SMG positions within The…

The recently developed JWST Exoplanet Observation Simulator (JexoSim) simulates transit spectroscopic observations of exoplanets by JWST with each of its four instruments using a time-domain approach. Previously we reported the validation…

Earth and Planetary Astrophysics · Physics 2021-09-15 Subhajit Sarkar , Nikku Madhusudhan

Shape-from-Template (SfT) refers to the class of methods that reconstruct the 3D shape of a deforming object from images/videos using a 3D template. Traditional SfT methods require point correspondences between images and the texture of the…

Computer Vision and Pattern Recognition · Computer Science 2026-05-04 Thuy Tran , Ruochen Chen , Shaifali Parashar

The landscape of computational building blocks of efficient image restoration architectures is dominated by a combination of convolutional processing and various attention mechanisms. However, convolutional filters, while efficient, are…

Image and Video Processing · Electrical Eng. & Systems 2025-01-23 Mohammad Shahab Sepehri , Zalan Fabian , Mahdi Soltanolkotabi

Maximally Smooth Functions (MSFs) are a form of constrained functions in which there are no inflection points or zero crossings in high order derivatives. Consequently, they have applications to signal recovery in experiments where signals…

Cosmology and Nongalactic Astrophysics · Physics 2021-03-01 H. T. J. Bevins , W. J. Handley , A. Fialkov , E. de Lera Acedo , L. J. Greenhill , D. C. Price