Results 1 to 10 of about 60,237 (145)
Blurred Star Image Processing for Star Sensors under Dynamic Conditions [PDF]
Sensors, 2012 The precision of star point location is significant to identify the star map and to acquire the aircraft attitude for star sensors. Under dynamic conditions, star images are not only corrupted by various noises, but also blurred due to the angular rate ...
Lei Guo, Weina Zhang, Wei Quan
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A High Precision Star Image Pre-Processing Method Against Earth-Atmosphere Radiation of Star Sensor [PDF]
Hangkong bingqi, 2023 Star sensors installed on near-space vehicles are susceptible to earth-atmosphere radiation. As a result, the accuracy of star extraction and the performance of celestial system is significantly degraded.
Liu Yuxin, Wang Xinlong, Hu Xiaodong, Wang Xun
doaj +2 more sources
Sensors, 2022 A catalogue of over 22,000 objects in Earth’s orbit is currently maintained, and that number is expected to double within the next decade. Novel data collection regimes are needed to scale our ability to detect, track, classify and characterize resident ...
Siddharth Dave +2 more
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Restoration of Non-Uniform Motion-Blurred Star Images Based on Dynamic Strip Attention [PDF]
Journal of ImagingWhen capturing star images in long-exposure mode, due to the relative motion between stars and space objects and the observation camera, strip tailings with different directions and lengths will be formed, resulting in a serious decline in image quality ...
Jixin Han, Zhaodong Niu, Jun He
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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
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Automatic Data Reduction of Image Sequences Acquired in Object Tracking Mode for Detection and Position Measurement of Faint Orbital Objects [PDF]
SensorsPrecise object tracking of space objects is an image acquisition method that uses the mount of the telescope to orient the instrument in real time towards the target to be tracked, compensating for the target’s motion.
Radu Danescu, Vlad Turcu
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Synergistic Attention for Ship Instance Segmentation in SAR Images
Remote Sensing, 2021 This paper takes account of the fact that there is a lack of consideration for imaging methods and target characteristics of synthetic aperture radar (SAR) images among existing instance segmentation methods designed for optical images.
Danpei Zhao +5 more
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Компьютерная оптика, 2023 A rotational blur correction algorithm is considered as the initial stage of image processing in the problem of attitude measurement using a star tracker. To implement this algorithm, the star tracker must be equipped with a three-axis gyroscope.
N.N. Vasilyuk
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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
openaire +1 more source
The Guide Star Catalog. I - Astronomical foundations and image processing
Astronomical Journal, 1990 Michael Shara
exaly +2 more sources