Results 11 to 20 of about 5,336,206 (299)
A Fast Star-Detection Algorithm under Stray-Light Interference
Photonics, 2023 The interference caused by stray light leads to the invalid attitude of star sensors in orbit, thus affecting the attitude control of satellites. In order to overcome this problem, this paper proposes a fast star-detection algorithm with strong stray ...
Kaili Lu +5 more
doaj +4 more sources
IEEE Access, 2019 Extracting accurate star centroids in the observed star images is one of the key problems for image navigation of the geosynchronous interferometric infrared sounder (GIIRS) of Fengyun-4A Satellite (FY-4A), the first scientific experimental satellite of ...
Haopeng Zhang +8 more
doaj +4 more sources
Accurate Star Centroid Detection for the Advanced Geosynchronous Radiation Imager of Fengyun-4A
IEEE Access, 2018 Star observation can be used for the image navigation of certain instruments aboard the three-axis stabilized geostationary satellites. How to extract the accurate star centroids in the observed star images is one of the key problems.
Haopeng Zhang +8 more
doaj +4 more sources
A Curvature-Based Multidirectional Local Contrast Method for Star Detection of a Star Sensor
Photonics, 2021 Stray light, such as sunlight, moonlight, and earth-atmosphere light, can bring about light spots in backgrounds, and it affects the star detection of star sensors.
Kaili Lu +5 more
doaj +2 more sources
Cell Detection with Star-convex Polygons [PDF]
International Conference on Medical Image Computing and Computer-Assisted Intervention, 2018 Automatic detection and segmentation of cells and nuclei in microscopy images is important for many biological applications. Recent successful learning-based approaches include per-pixel cell segmentation with subsequent pixel grouping, or localization ...
Uwe Schmidt +3 more
semanticscholar +5 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
doaj +2 more sources
Detection and parameter estimation of gravitational waves from binary neutron-star mergers in real LIGO data using deep learning [PDF]
Physics Letters B, 2021 One of the key challenges of real-time detection and parameter estimation of gravitational waves from compact binary mergers is the computational cost of conventional matched-filtering and Bayesian inference approaches.
Plamen G. Krastev +3 more
doaj +2 more sources
STAR Loss: Reducing Semantic Ambiguity in Facial Landmark Detection [PDF]
Computer Vision and Pattern Recognition, 2023 Recently, deep learning-based facial landmark detection has achieved significant improvement. However, the semantic ambiguity problem degrades detection performance.
Zhenglin Zhou +5 more
semanticscholar +1 more source
Axion star explosions: A new source for axion indirect detection [PDF]
Physical Review D, 2023 If dark matter is composed of axions, then axion stars form in the cores of dark matter halos. These stars are unstable above a critical mass, decaying to radio photons that heat the intergalactic medium, offering a new channel for axion indirect ...
Miguel Escudero +5 more
semanticscholar +1 more source
Probable detection of an eruptive filament from a superflare on a solar-type star [PDF]
Nature Astronomy, 2021 Solar flares are often accompanied by filament/prominence eruptions (~10 4 K and ~10 10−11 cm −3 ), sometimes leading to coronal mass ejections that directly affect the Earth’s environment 1 , 2 .
K. Namekata +22 more
semanticscholar +1 more source