Results 11 to 20 of about 60,336 (244)
Star–Galaxy Image Separation with Computationally Efficient Gaussian Process Classification
The Astronomical Journal, 2022 Abstract We introduce a novel method for discerning optical telescope images of stars from those of galaxies using Gaussian processes (GPs). Although applications of GPs often struggle in high-dimensional data modalities such as optical image classification, we show that a low-dimensional embedding of images into a metric space defined ...
Amanda L. Muyskens +6 more
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Analysis and Improvement of Star Identification Algorithm Based on Singular Value Decomposition for Star Sensor [PDF]
فصلنامه علوم و فناوری فضایی, 2023 One of the attitude sensors for the spacecraft is the star sensor. The attitude calculation by the star sensor includes several steps: image processing, star identification, database search, and implementation of the attitude determination algorithm ...
Mona Zahednamazi, Alireza Toloui
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A SLIC-DBSCAN Based Algorithm for Extracting Effective Sky Region from a Single Star Image
Sensors, 2021 The star tracker is widely used for high-accuracy missions due to its high accuracy position high autonomy and low power consumption. On the other hand, the ability of interference suppression of the star tracker has always been a hot issue of concern. A
Chenguang Shi +4 more
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On-Orbit Geometric Distortion Correction on Star Images through 2D Legendre Neural Network
Remote Sensing, 2022 The star tracker is a prerequisite device to realize high-precision attitude determination for a spacecraft. However, due to the errors in optical lens machining, optical path assembly, and temperature alternation, optical instruments suffer from some ...
Chenguang Shi +3 more
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Fast and robust star detection algorithm based on the dyadic wavelet transform
IET Image Processing, 2023 Star detection is an important part of the spacecraft attitude determination performed by star trackers. The current advanced star detection algorithms can effectively extract star points in complex backgrounds.
Zhanglei Chen +3 more
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The updated DESGW processing pipeline for the third LIGO/VIRGO observing run [PDF]
EPJ Web of Conferences, 2020 The DESGW group seeks to identify electromagnetic counterparts of gravitational wave events seen by the LIGO-VIRGO network, such as those expected from binary neutron star mergers or neutron star-black hole mergers.
Herner Kenneth +12 more
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Stem Cell Research & Therapy, 2019 Adipogenesis is essential in in vitro experimentation to assess differentiation capability of stem cells, and therefore, its accurate measurement is important.
Chengxiang Yuan +7 more
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Stem Cell Research & Therapy, 2021 Background Effective stem cell therapy is dependent on the stem cell quality that is determined by their differentiation potential, impairment of which leads to poor engraftment and survival into the target cells.
Smarajit Chakraborty +8 more
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Integrated representation for discrete Fourier and wavelet transforms using vector notation
Mehran University Research Journal of Engineering and Technology, 2022 Many mathematical operations are implemented easily through transform domain operations. Multiple transform domain operations are used independently in large and complex applications.
Tariq Javid +3 more
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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 +2 more
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