光学学报, 2016, 36 (10): 1028003, 网络出版: 2016-10-12
基于Gabor特征与局部保护降维的高光谱图像分类算法 下载: 537次
Hyperspectral Image Classification Algorithm Based on Gabor Feature and Locality-Preserving Dimensionality Reduction
遥感 高光谱图像分类 Gabor特征 局部保护降维 高斯混合模型 remote sensing hyperspectral image classification Gabor features locality-preserving dimensionality reduction Gaussian mixture model
摘要
提出了两种基于Gabor特征与局部保护降维的高光谱图像分类算法。该算法利用嵌入主成分分析的Gabor变换对高光谱图像进行特征提取。为了保护相邻特征的局部信息,利用局部Fisher判别分析或局部保护非负矩阵分离对Gabor特征进行降维,并采用高斯混合模型分类器对降维后的特征进行分类。两组高光谱数据的实验结果表明,本文算法不但能充分挖掘高光谱图像的谱间-空间特征,而且有效保护了高光谱图像的局部特征信息与多模型结构。与现有的几种算法相比,本文算法能得到更高的分类精度和Kappa系数,在高斯噪声环境中也具有更强的稳健性。
Abstract
Two hyperspectral image classification algorithms based on Gabor features and locality-preserving dimensionality reduction are proposed. The Gabor transform is studied and implemented to extract features for hyperspectral image in the principal component analysis-projected domain. To protect locality information of neighbor features, locality Fisher discriminant analysis or locality-preserving non-negative matrix factorization is employed to reduce the dimensionality of Gabor-based feature space. The Gaussian mixture model classifier is used for classification results. Experimental results obtained from two hyperspectral datasets show that the proposed algorithms not only extract spectral-spatial features effectively, but also preserve local-feature information and multi-model structure of hyperspectral image. Compared with several existing algorithms, the proposed algorithms can obtain high classification accuracy and Kappa coefficient, and has strong robustness in Gaussian noise environment.
叶珍, 白璘, 粘永健. 基于Gabor特征与局部保护降维的高光谱图像分类算法[J]. 光学学报, 2016, 36(10): 1028003. Ye Zhen, Bai Lin, Nian Yongjian. Hyperspectral Image Classification Algorithm Based on Gabor Feature and Locality-Preserving Dimensionality Reduction[J]. Acta Optica Sinica, 2016, 36(10): 1028003.