k-Nearest Neighbors for automated classification of celestial objects

Details k-Nearest Neighbors for automated classification of celestial objects k-Nearest Neighbors for automated classification of celestial objects

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008scchg..51..916l&link_type=abstract

Science in China Series G: Physics, Mechanics and Astronomy, Volume 51, Issue 7, pp.916-922

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The nearest neighbors (NNs) classifiers, especially the k-Nearest Neighbors ( kNNs) algorithm, are among the simplest and yet most efficient classification rules and widely used in practice. It is a nonparametric method of pattern recognition. In this paper, k-Nearest Neighbors, one of the most commonly used machine learning methods, work in automatic classification of multi-wavelength astronomical objects. Through the experiment, we conclude that the running speed of the kNN classier is rather fast and the classification accuracy is up to 97.73%. As a result, it is efficient and applicable to discriminate active objects from stars and normal galaxies with this method. The classifiers trained by the kNN method can be used to solve the automated classification problem faced by astronomy and the virtual observatory (VO).

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