Results 51 to 60 of about 1,206 (204)
Enhancement of the Centroiding Algorithm for Star Tracker Measure Refinement
, 2003 The application of the hyperacuity technique to image processing of star trackers is analysed. An analytical study of the error introduced by the centroiding algorithm is presented and it is shown that a systematic contribution and a random one exist ...
RUFINO, GIANCARLO, ACCARDO, DOMENICO
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Space optical instruments optimisation thanks to CMOS image sensor technology [PDF]
, 2005 Today, both CCD and CMOS sensors can be envisaged for nearly all visible sensors and instruments designed for space needs. Indeed, detectors built with both technologies allow excellent electro-optics performances to be reached, the selection of the most
Magali Estribeau +15 more
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16. On the centroid of a trapezoid [PDF]
The Mathematical Gazette, 1895 n ...
openaire +2 more sources
Exposure Time Optimization for Highly Dynamic Star Trackers
Sensors, 2014 Under highly dynamic conditions, the star-spots on the image sensor of a star tracker move across many pixels during the exposure time, which will reduce star detection sensitivity and increase star location errors.
Xinguo Wei +3 more
doaj +1 more source
Chemistry &Biodiversity, Volume 23, Issue 6, June 2026.Comprehensive chromatographic and chemometric profiling of five medicinal South African Bulbine species across leaves, rhizomes, and roots reveals 73 metabolites, including species‐specific phenylanthraquinones, flavonoids, and anthocyanins, that serve as reliable chemical markers for species authentication.
Ramoagi T. Segone +7 more
wiley +1 more source
Iteratively Weighted Centroiding for Shack-Hartmann Wave-Front Sensors [PDF]
, 2007 Several techniques have been used with Shack-Hartmann wavefront sensors to determine the local wave-front gradient across each lenslet. In this article we introduce an iterative weighted technique which is specifically targeted for open-loop applications
Moallem, M M, Baker, K L
core
A Centroiding Algorithm for Point-source Trails
The Astronomical JournalAstrometric measurements are significantly challenged by the relative motion between the point source and the telescope, primarily due to the difficulty in accurately determining the position of the point source at the mid-exposure moment.
Linpeng Wu +5 more
doaj +1 more source
Extended centroid of hyperrings
Gulf Journal of Mathematics, 2020 In this paper, the notation of extended centroid is applied to hyperring. We show that the extended centroid C of a hyperring is a hyperfield. Also, we show that if a, b ∈ S such that axb = bxa for all x ∈ R, then there exists q ∈ C such that qa = b where R is a prime hyperring and S be the central closure of R.
Yazarli, Hasret +2 more
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Survey on AI‐Enabled Computer Vision Technologies and Applications for Space Robotic Missions
Journal of Field Robotics, Volume 43, Issue 4, Page 2553-2584, June 2026.ABSTRACT This survey provides a comprehensive overview of recent advancements and challenges in Artificial Intelligence (AI)‐enabled computer vision (CV) techniques for space robotic missions, spanning critical phases such as Entry, Descent, and Landing (EDL), orbital operations, and planetary surface exploration.
Maciej Quoos +6 more
wiley +1 more source
Ecological Entomology, Volume 51, Issue 3, Page 558-569, June 2026.Agricultural cover was positively associated with fluctuating asymmetry in Trypoxylon opacum, suggesting a possible increase in developmental instability in intensively managed landscapes. Wing size was positively related to forest cover and negatively related to agricultural cover, indicating that forested landscapes may promote larger body size ...
Luana Vieira Carlin dos Santos +3 more
wiley +1 more source