Results 271 to 280 of about 29,249,487 (323)

Learning deconvolutions for astronomical images

Monthly notices of the Royal Astronomical Society, 2021
Astronomical images allow people to explore the Universe and monitor space; however, due to the long distances involved, such images are generally collected using telescopic equipment.
M. Long, Yang Soubo, Shu Cong, Ni Weiping, Liu Tong   +4 more
semanticscholar   +1 more source

Polarization measuring astronomical instrument: an improved method

Romanian Astronomical Journal, 2023
"This work deals with a new theoretical method proposed with the intent of improving the quality of astronomical polarimetric data. The theoretical method is ap- plied to one of the simplest possible birefringent type polarizer device constructs, being a hybrid measurement procedure between the fixed position angles and the continu- ous rotation ...
openaire   +1 more source

Astronomical image restoration using Bayesian methods

2016 IEEE Chinese Guidance, Navigation and Control Conference (CGNCC), 2016
This paper is devoted to the combination of several prior models in Bayesian image restoration and increasingly wide utilization in astronomical images. Bayesian methods introduce image models using prior knowledge and address the ill-posed problem in the registration parameter estimation.
null Xiaoping Shi, null Rui Guo, null Zicai Wang   +2 more
openaire   +1 more source

The Multimodal Universe: Enabling Large-Scale Machine Learning with 100 TB of Astronomical Scientific Data

Neural Information Processing Systems
We present the MULTIMODAL UNIVERSE, a large-scale multimodal dataset of scientific astronomical data, compiled specifically to facilitate machine learning research.
The Multimodal Universe Collaboration. Eirini Angeloudi, Jeroen Audenaert, Micah Bowles, B. M. Boyd, David Chemaly, B. Cherinka, Ioana Ciucua, Miles Cranmer, Aaron Do, M. Grayling, E. Hayes, Tom Hehir, Shirley Ho, M. Huertas-Company, Kartheik G. Iyer, Maja Jabłońska, François Lanusse, Henry W. Leung, K. Mandel, J. R. Mart'inez-Galarza, Peter Melchior, Lucas Meyer, L. Parker, Helen Qu, Jeff Shen, Michael J. Smith, Connor Stone, Mike Walmsley, John F. Wu   +28 more
semanticscholar   +1 more source

Codebook Design Method for Astronomical Images Compression

Full Text Book of Minar Congress9, 2023
The searching in binary codebook of a combination the Block Truncation Coding and Vector Quantization methods BTC and VQ desires a time consuming process because the full codebook search for every input vector toward discovery the best matched codevector or code word, so, in this paper, at first, a small binary codebook has been designed then by ...
openaire   +1 more source

New approach for pixelization of big astronomical data for machine vision purpose

International Symposium on Industrial Electronics, 2019
In this paper we presented the new algorithm for pixelization of astronomical data in celestial sphere. This algorithm is used for partition and analysis of the large astronomical catalogues that contain data of up to billion objects.
V. Akhmetov, S. Khlamov, I. Tabakova, W. Hernandez, J. Nieto-Hipólito, P. Fedorov   +5 more
semanticscholar   +1 more source

Automatic processing method for astronomical CCD images

SPIE Proceedings, 2002
Since several hundreds of CCD images are obtained with the CCD camera in the Lower Latitude Meridian Circle (LLMC) every observational night, it is essential to adopt an automatic processing method to find the initial position of each object in these images, to center the object detected and to calculate its magnitude.
Binhua Li, Lei Yang, Wei Mao
openaire   +1 more source

Rapid methods for determining astronomical azimuths

Eos, Transactions American Geophysical Union, 1944
Astronomical computations for position or azimuth are not difficult for the astronomer or mathematician, even though such computations may be time‐consuming. In the past few years, however, there has been a general trend toward the simplification of problems involving astronomy.
openaire   +1 more source

METHOD FOR EVENING ASTRONOMIC OBSERVATIONS

Galaxy International Interdisciplinary Research Journal, 2022
This article describes the method of organizing astronomy laboratories and observations in general secondary schools. At the same time, we discussed how practical observations can be made in astronomy, and their types.
openaire   +1 more source

Geometric method to measure astigmatism aberration at astronomical telescopes

Applied Optics, 2007
A simple geometrical method to measure the aberration of astigmatism present in the wavefront that emerges from a telescope is presented. The method is based on the analysis of the external contour of the image of a slightly defocused star. An expression elliptical edge is obtained, which links the rms value of Z22 to the geometric parameters of the ...
Esteban, Luna, Luis, Salas, Leonel, Gutiérrez, J Manuel, Nuñez   +3 more
openaire   +2 more sources