基于特征贡献选择的遥感影像变化检测方法研究

Remote Sensing Image Change Detection Method Based on Selection of Feature Contribution

根据决策树算法中的信息增益率概念,提出一种基于特征贡献度的特征选择方法。该方法通过累加统计各项特征在类别分析中的贡献,确定特征贡献度并作为权值代入特征空间距离计算公式,实现高维特征的降维和去相关。实验表明,同源影像间的特征选择可以有效地提高变化检测精度。

Based on the concept of information gain ratio in the decision tree algorithm, this paper has proposed a novel feature selection method using the attribute contribution. The contributions of attribute are obtained by accumulating in the category analysis. And then the feature space distance formula can be calculated using the feature contribution as weights. The feature contribution helps to reduce the dimension of the high-dimensional fea- ture. The proposed method is tested in the remote sensing image change detection. The ex- perimental results show that the proposed feature selection method can effectively improve the accuracy of the homologous image change detection results.