A Method for Auto-Recognizing the M-type Stars Based on Wavelet Feature

LIU Zhong-tian, LI Xiang-ru, WU Fu-chao, ZHAO Yong-heng

ACTA ELECTRONICA SINICA ›› 2007, Vol. 35 ›› Issue (1) : 157-160.

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ACTA ELECTRONICA SINICA ›› 2007, Vol. 35 ›› Issue (1) : 157-160.

A Method for Auto-Recognizing the M-type Stars Based on Wavelet Feature

  • LIU Zhong-tian1, LI Xiang-ru2, WU Fu-chao2, ZHAO Yong-heng3
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Abstract

M-type stars play a significant role in the study of star evolution.The LAMOST project,the largest sky survey project being implemented in China,urgently needs a system for auto-recognizing M-type stars.This paper presents a novel method that can automatically recognize M-type stars.This method consists of three main steps:First,after a wavelet transform with 5 scales on the spectra in a selected wavelength region,the wavelet features are extracted from the transformed coefficients on the 5th scale.Then,the characteristic frequency of M-type stars and the locations of absorption bands are obtained accurately through the wavelet features.Finally,based on the results of the former step,M-type stars in all kinds of celestial bodies can be recognized.The extensive experiments with real observed spectra show that the proposed method is effective and the correct rate of this method is as high as 97.56%.

Key words

astronomical spectra / detection of absorption bands / characteristic frequency / wavelet feature / wavelet transform

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LIU Zhong-tian, LI Xiang-ru, WU Fu-chao, ZHAO Yong-heng. A Method for Auto-Recognizing the M-type Stars Based on Wavelet Feature[J]. Acta Electronica Sinica, 2007, 35(1): 157-160.
PDF(551 KB)

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