Automated morphological classification of galaxies based on projection gradient nonnegative matrix factorization algorithm |
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| Authors: | I M Selim Mohamed Abd El Aziz |
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| Institution: | 1.Astronomy Department,National Research Institute of Astronomy and Geophysics,Cairo,Egypt;2.Higher Technological Institute (HTI),Cairo,Egypt;3.Department of Mathematics, Faculty of Science,Zagazig University,Zagazig,Egypt |
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| Abstract: | The development of automated morphological classification schemes can successfully distinguish between morphological types of galaxies and can be used for studies of the formation and subsequent evolution of galaxies in our universe. In this paper, we present a new automated machine supervised learning astronomical classification scheme based on the Nonnegative Matrix Factorization algorithm. This scheme is making distinctions between all types roughly corresponding to Hubble types such as elliptical, lenticulars, spiral, and irregular galaxies. The proposed algorithm is performed on two examples with different number of image (small dataset contains 110 image and large dataset contains 700 images). The experimental results show that galaxy images from EFIGI catalog can be classified automatically with an accuracy of ～93% for small and ～92% for large number. These results are in good agreement when compared with the visual classifications. |
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