NDLI: Extracting the centroid from the sun-moon image in astronomy orientation

Content Provider	IEEE Xplore Digital Library
Author	Han Yong-qi Bai Yong-qiang Jia Feng-kai
Copyright Year	2014
Description	Author affiliation: Dept. of Autom., Beijing Inst. of Technol., Beijing, China (Han Yong-qi; Bai Yong-qiang; Jia Feng-kai)
Abstract	In astronomical orientation, we usually choose the sun, the moon as observation objects, using the theodolite to obtain the horizontal and vertical scale readings as the crosshair theodolite and astral edge are tangent. This operation is subjective to human disturbance, affecting the orientation precision afterwards. Comparing to the previous method, the method of image processing is much simple in operation, and reduces the manual intervention as long as the sun and the moon are within the scope of the CCD imaging. After imaging, we first extract the object centroid coordinates from the embedded image module, and then according to the imaging model, we get the angle of visual axis interacts with the center line of the stars. This article analyzes the main characteristic of the sun-moon image and discusses the various circumstances image centroid algorithm for fitting. The algorithm is able to separate the sun and moon from complex background environment. Besides, even in the cases of the poor quality of the images, such as stars appear some incompleteness, low star brightness, or fuzzy boundaries, the algorithm can still locate the edge effectively with better fitting.
Starting Page	4721
Ending Page	4726
File Size	330238
Page Count	6
File Format	PDF
ISBN	9789881563873
ISSN	19341768
DOI	10.1109/ChiCC.2014.6895736
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-07-28
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	TCCT, CAA
Subject Keyword	Image segmentation Target recognition Image edge detection Moon Fitting Image Processing Gray-scale Astronomical Orientation Centroid Algorithm Sun
Content Type	Text
Resource Type	Article

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