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• W3105361632 abstract "We present an application of Mathematical Morphology (MM) for the classification of astronomical objects, both for star/galaxy differentiation and galaxy morphology classification. We demonstrate that, for CCD images, 99.3 +/- 3.8 % of galaxies can be separated from stars using MM, with 19.4 +/- 7.9 % of the stars being misclassified. We demonstrate that, for photographic plate images, the number of galaxies correctly separated from the stars can be increased using our MM diffraction spike tool, which allows 51.0 +/- 6.0 % of the high-brightness galaxies that are inseparable in current techniques to be correctly classified, with only 1.4 +/- 0.5 % of the high-brightness stars contaminating the population. We demonstrate that elliptical (E) and late-type spiral (Sc-Sd) galaxies can be classified using MM at an accuracy of 91.4 +/- 7.8 %. It is a method involving less `free parameters' than current techniques, especially automated machine learning algorithms. The limitation of MM galaxy morphology based on seeing and distance is also presented. We examine various star/galaxy differentiation and galaxy morhpology classification techniques commonly used today, and show that the above MM techniques compare very favourably." @default.
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• W3105361632 date "2006-01-01" @default.
• W3105361632 modified "2023-10-09" @default.
• W3105361632 title "Mathematical Morphology: Star/Galaxy Differentiation & Galaxy Morphology Classification" @default.
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• W3105361632 doi "https://doi.org/10.1071/as06010" @default.
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