Results 11 to 20 of about 15,009,839 (271)
Positioning Using Star Images and a Combined Image Processing and Optimization Algorithm [PDF]
فصلنامه علوم و فناوری فضاییThe celestial navigation is one of the oldest navigation methods for determining the position, which is done by observing different celestial bodies such as stars.
Amirreza Kosari, Bahador Abolpour
doaj +2 more sources
Loopy belief propagation and probabilistic image processing [PDF]
, 2003 Estimation of hyperparameters by maximization of the marginal likelihood in probabilistic image processing is investigated by using the cluster variation method.
Inoue, J., Tanaka, K., Titterington, M.
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Processing Centroids of Smearing Star Image of Star Sensor [PDF]
Mathematical Problems in Engineering, 2014 A novel method was presented for increasing the accuracy of subpixel centroid estimation for smearing star image. Model of the smearing trajectory of smearing star was built. It helped to study the analytical form of the errors, caused by image smearing, for centroid estimation.
Yufu Liao +3 more
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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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Sierra Club, Lone Star Chapter Newsletter
, 2019 Newsletter from the Lone Star Chapter of Sierra Club regarding Big Thicket Committee with an article titled "Big Thicket Expansion Sought" from the Lone Star SierranThe Big Thicket Collection contains materials relating to the conservation of the Big ...
Sierra Club, Lone Star Chapter
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Minimum entropy restoration using FPGAs and high-level techniques [PDF]
, 2007 One of the greatest perceived barriers to the widespread use of FPGAs in image processing is the difficulty for application specialists of developing algorithms on reconfigurable hardware. Minimum entropy deconvolution (MED) techniques have been shown to
Bruce, R. +3 more
core +4 more sources
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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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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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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