Results 61 to 70 of about 107,385 (182)

ImageMM: Joint Multi-frame Image Restoration and Super-resolution

The Astronomical Journal
A key processing step in ground-based astronomy involves combining multiple noisy and blurry exposures to produce an image of the night sky with an improved signal-to-noise ratio.
Yashil Sukurdeep, Tamás Budavári, Andrew J. Connolly, Fausto Navarro   +3 more
doaj   +1 more source

Galaxy–Galaxy Strong Lensing with U-Net (GGSL-UNet). I. Extracting Two-dimensional Information from Multiband Images in Ground and Space Observations

The Astrophysical Journal Supplement Series
We present a novel deep learning method to separately extract the two-dimensional flux information of the foreground galaxy (deflector) and background system (source) of galaxy–galaxy strong-lensing events using U-Net (GGSL-UNet for short). In particular,
Fucheng Zhong, Ruibiao Luo, Nicola R. Napolitano, Crescenzo Tortora, Rui Li, Xincheng Zhu, Valerio Busillo, L. V. E. Koopmans, Giuseppe Longo   +8 more
doaj   +1 more source

Observatory/data centre partnerships and the VO-centric archive: The JCMT Science Archive experience

, 2014
We present, as a case study, a description of the partnership between an observatory (JCMT) and a data centre (CADC) that led to the development of the JCMT Science Archive (JSA).
Bell, Graham S., Chrysostomou, Antonio, Currie, Malcolm J., Dowler, Patrick, Economou, Frossie, Gaudet, Severin, Goliath, Sharon, Graves, Sarah F., Jenness, Tim, Johnstone, Doug, Ouellette, John, Redman, Russell O., Schade, David   +12 more
core   +1 more source

Simulating Image Coaddition with the Nancy Grace Roman Space Telescope. III. Software Improvements and New Linear Algebra Strategies

The Astrophysical Journal Supplement Series
The Nancy Grace Roman Space Telescope will implement a devoted weak gravitational lensing program with its High Latitude Wide Area Survey. For cosmological purposes, a critical step in Roman image processing is to combine dithered undersampled images ...
Kaili Cao, Christopher M. Hirata, Katherine Laliotis, Masaya Yamamoto, Emily Macbeth, M. A. Troxel   +5 more
doaj   +1 more source

Simulating Image Coaddition with the Nancy Grace Roman Space Telescope. IV. Hyperparameter Optimization and Experimental Features

The Astrophysical Journal
For weak gravitational lensing cosmology with the forthcoming Nancy Grace Roman Space Telescope, image coaddition (or construction of oversampled images from undersampled ones) is a critical step in the image processing pipeline.
Kaili Cao, Christopher M. Hirata, Katherine Laliotis, Masaya Yamamoto, Emily Macbeth, M. A. Troxel, (Roman HLIS Cosmology PIT)   +6 more
doaj   +1 more source

Linear Image Regridding and Coaddition with Oversampled Point Spread Functions: Lessons from 1D

The Astronomical Journal
Image regridding and coaddition have a wide range of applications in astronomical observations. Image Combination (I mcom) , an algorithm that provides control over point-spread function (PSF) and noise in coadded images, has been found to meet the ...
Kaili Cao, Roman HLIS Cosmology PIT
doaj   +1 more source

Multi-frequency image reconstruction for radio-interferometry with self-tuned regularization parameters

, 2017
As the world's largest radio telescope, the Square Kilometer Array (SKA) will provide radio interferometric data with unprecedented detail. Image reconstruction algorithms for radio interferometry are challenged to scale well with TeraByte image sizes ...
carrillo, dewdney, hogbom, morozov, offringa, onose, onose, thompson, v?   +8 more
core   +2 more sources

On reference star recognition and identification

Geodesy and Cartography, 2014
The paper deals with a research in the area of automation of positional star observations. In order to fully employ recent progress in imaging technologies, star image recognition and reference star identification process should gain comparable level of ...
Ansis Zariņš, Inese Janpaule, Jānis Kaminskis   +2 more
doaj   +1 more source

Distributed Deblurring of Large Images of Wide Field-Of-View

, 2017
Image deblurring is an economic way to reduce certain degradations (blur and noise) in acquired images. Thus, it has become essential tool in high resolution imaging in many applications, e.g., astronomy, microscopy or computational photography.
Bianchi, Pascal, Ferrari, André, Flamary, Rémi, Mourya, Rahul, Richard, Cédric   +4 more
core  

The AKARI/IRC Mid-Infrared All-Sky Survey

, 2010
Context : AKARI is the first Japanese astronomical satellite dedicated to infrar ed astronomy. One of the main purposes of AKARI is the all-sky survey performed with six infrared bands between 9 and 200um during the period from 2006 May 6 to 2007 ...
A. Cassatella, A. Salama, C. Alfageme, C. Stephenson, C. Yamauchi, Cohen, D. Ishihara, F. Usui, Fujiwara, H. Fujiwara, H. Kataza, H. Matsuhara, H. Murakami, H. Shibai, H. Watarai, I. Sakon, I. Yamamura, Ishihara, Ishihara, Ishihara, Ishihara, Ita, J. Pyo, K. Uemizu, Kaneda, Kawada, M. Cohen, M. Ueno, Murakami, N. Cox, N. Fujishiro, Neugebauer, Onaka, P. García-Lario, Price, Reach, S. Hasegawa, S. Oyabu, S. Takita, Soifer, T. G. Müller, T. Nakagawa, T. Onaka, T. Tanabé, T. Wada, Takita, Tanabé, Ueda, W. Kim, Wada, Y. Ita, Y. Ohyama   +51 more
core   +1 more source