Automatic processing method for astronomical CCD images

Binhua Li; Lei Yang; Wei Mao

doi:10.1117/12.460391

19 December 2002 Automatic processing method for astronomical CCD images

Binhua Li, Lei Yang, Wei Mao

Proceedings Volume 4847, Astronomical Data Analysis II; (2002) https://doi.org/10.1117/12.460391
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

Since several hundreds of CCD images are obtained with the CCD camera in the Lower Latitude Meridian Circle (LLMC) every observational night, it is essential to adopt an automatic processing method to find the initial position of each object in these images, to center the object detected and to calculate its magnitude. In this paper several existing automatic search algorithms searching for objects in astronomical CCD images are reviewed. Our automatic searching algorithm is described, which include 5 steps: background calculating, filtering, object detecting and identifying, and defect eliminating. Then several existing two-dimensional centering algorithms are also reviewed, and our modified two-dimensional moment algorithm and an empirical formula for the centering threshold are presented. An algorithm for determining the magnitudes of objects is also presented in the paper. All these algorithms are programmed with VC++ programming language. In the last our method is tested with CCD images from the 1m RCC telescope in Yunnan Observatory, and some primary results are also given.

Citation Download Citation

Binhua Li, Lei Yang, and Wei Mao "Automatic processing method for astronomical CCD images", Proc. SPIE 4847, Astronomical Data Analysis II, (19 December 2002); https://doi.org/10.1117/12.460391

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