望远镜系统自动对焦最优搜索算法

IF 1.5 Q3 ASTRONOMY & ASTROPHYSICS

Journal of Astronomical Instrumentation Pub Date : 2021-07-09 DOI:10.1142/s2251171721500124

I. Helmy, A. Hamdy, Doaa Eid, A. Shokry

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引用次数: 5

摘要

聚焦精度影响天文观测的质量。自动聚焦是为天文观测设计的成像系统所必需的。自动聚焦系统通过使用所提出的搜索算法来搜索最佳聚焦位置。搜索算法在搜索过程中使用图像的聚焦水平作为其目标函数。本文旨在研究几种搜索算法的性能，以选择合适的搜索算法。适当的搜索算法将用于开发Kottamia天文台（KAO）的自动聚焦系统。通过将几种搜索算法应用于五个星团观测序列来选择最优搜索算法。然后，基于两个标准来评估它们的性能，即准确性和步数。实验结果表明，二进制搜索是最优的搜索算法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Autofocusing Optimal Search Algorithm for a Telescope System

Focus accuracy affects the quality of the astronomical observations. Auto-focusing is necessary for imaging systems designed for astronomical observations. The automatic focus system searches for the best focus position by using a proposed search algorithm. The search algorithm uses the image’s focus levels as its objective function in the search process. This paper aims to study the performance of several search algorithms to select a suitable one. The proper search algorithm will be used to develop an automatic focus system for Kottamia Astronomical Observatory (KAO). The optimal search algorithm is selected by applying several search algorithms into five sequences of star-clusters observations. Then, their performance is evaluated based on two criteria, which are accuracy and number of steps. The experimental results show that the Binary search is the optimal search algorithm.

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来源期刊

Journal of Astronomical Instrumentation ASTRONOMY & ASTROPHYSICS-

CiteScore

2.30

自引率

7.70%

发文量

期刊介绍： The Journal of Astronomical Instrumentation (JAI) publishes papers describing instruments and components being proposed, developed, under construction and in use. JAI also publishes papers that describe facility operations, lessons learned in design, construction, and operation, algorithms and their implementations, and techniques, including calibration, that are fundamental elements of instrumentation. The journal focuses on astronomical instrumentation topics in all wavebands (Radio to Gamma-Ray) and includes the disciplines of Heliophysics, Space Weather, Lunar and Planetary Science, Exoplanet Exploration, and Astroparticle Observation (cosmic rays, cosmic neutrinos, etc.). Concepts, designs, components, algorithms, integrated systems, operations, data archiving techniques and lessons learned applicable but not limited to the following platforms are pertinent to this journal. Example topics are listed below each platform, and it is recognized that many of these topics are relevant to multiple platforms. Relevant platforms include: Ground-based observatories[...] Stratospheric aircraft[...] Balloons and suborbital rockets[...] Space-based observatories and systems[...] Landers and rovers, and other planetary-based instrument concepts[...]