J4 ›› 2013, Vol. 40 ›› Issue (2): 18-24.doi: 10.3969/j.issn.1001-2400.2013.02.004

• Original Articles • Previous Articles     Next Articles

Wavelet hierarchical model for aurora images classification

YANG Xi;LI Jie;HAN Bing;GAO Xinbo   

  1. (School of Electronic Engineering, Xidian Univ., Xi'an  710071, China)
  • Received:2011-12-08 Online:2013-04-20 Published:2013-05-22
  • Contact: YANG Xi E-mail:xiyang.xidian@gmail.com

Abstract:

In order to improve the accuracy of aurora images classification, an algorithm based on the wavelet hierarchical model is proposed. In the proposed algorithm, the global and local wavelet features are extracted hierarchically first, then reduced in dimensions through the principal component analysis and used to classify the arc and three corona aurora images by the use of the support vector machine. By comparing the classification accuracy and time consumption, the optimal parameters in the wavelet hierarchical model are experimentally obtained and the validity of principal component analysis in feature optimization is verified. Experimental results show that the proposed algorithm improves the classification accuracy to a great degree with an acceptable time consumption compared with classical algorithms. Classification results between each two types of aurora images also provide some potential ways to improve the accuracy.

Key words: aurora image classification, wavelet hierarchical model, principal component analysis (PCA), support vector machine (SVM)

CLC Number: 

  • TN911.73