An improved method of the spatial point's position detection

Yu Zhang; Xiaofeng Li; Lichun Zhu; Jing Jin; Weimin Li

doi:10.1117/12.856569

22 July 2010 An improved method of the spatial point's position detection

Yu Zhang, Xiaofeng Li, Lichun Zhu, Jing Jin, Weimin Li

Proceedings Volume 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation; 77392P (2010) https://doi.org/10.1117/12.856569
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

Yu Zhang, Xiaofeng Li, Lichun Zhu, Jing Jin, and Weimin Li "An improved method of the spatial point's position detection", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77392P (22 July 2010); https://doi.org/10.1117/12.856569

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