一种SVM-RFE高光谱数据特征选择算法

A Feature Selection Algorithm for Hyperspectual Data with SVM-RFE

  • 摘要: 提出了一种基于一对一(one-verse-one,OVO)多类策略的支持向量机递归特征约减算法(supportvector machine recursive feature elimination,SVM-RFE)用于高光谱数据的特征选择。对比分析了该算法所选择波段与基于一对多(one-verse-all,OVA)策略的SVM-RFE算法、MSVM-RFE算法以及OneRI、nfoGain、ReliefF等3种基于特征排序的方法所选择波段在高光谱数据分类中的精度表现。结果显示,OVO SVM-RFE算法是一种可靠有效的高光谱数据特征选择算法,并且所选择波段在分类精度方面优于5种对比算法。

     

    Abstract: Many conventional classification algorithms have difficulties to be applied to hyperspectral data directly due to huge band number and high correlation among bands.Hence,how to reduce the band number and preserve the information of original data as much as possible simultaneously is an on-going issue.An algorithm of feature selection for hyperspectral data based on one-verse-one support vector machines recursive feature eliminate(OVO SVM-RFE) is proposed.The AVIRIS hyperspectral data was utilized to summarize the principle and characteristic in feature selection.The algorithm was compared to the one-verse-all SVM-RFE(OVA SVM-RFE),MSVM-RFE,OneR,InfoGain and ReliefF approach for feature selection in classification accuracy using support vector machines classifier.Experimental results indicate that the OVO SVM-RFE is a reliable and effective approach of feature selection for hyperspectral data and is superior to other five algorithms in accuracy of classification for selected bands.

     

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