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Proceedings Paper

An improved method of the spatial point's position detection
Author(s): Yu Zhang; Xiaofeng Li; Lichun Zhu; Jing Jin; Weimin Li
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Paper Abstract

During the experimental process of the spatial point's position detection, we analyze the advantages and disadvantages of the classical method, and propose an improved method. First, we interpolate the point's data to increase the size of the image. Then use the Zernike moment to detect the edge of the point. Finally, we obtain a coordinate of the center of the point by using the ellipse fitting algorithm, and take this coordinate as the position of the spatial point. Experimental results in laboratory show that, the proposed detection method on sub-pixel level is realized to detect the spatial point's position with high-accuracy. And experimental results of relative measurement with 100 meters outdoor show that, the repeatable accuracy of this method can reach 0.12 pixel during the day and 0.05 pixel at night.

Paper Details

Date Published: 22 July 2010
PDF: 11 pages
Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77392P (22 July 2010); doi: 10.1117/12.856569
Show Author Affiliations
Yu Zhang, Univ. of Science and Technology of China (China)
Xiaofeng Li, Univ. of Science and Technology of China (China)
Lichun Zhu, National Astronomical Observatories (China)
Jing Jin, Univ. of Science and Technology of China (China)
Weimin Li, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 7739:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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