基于黎曼流形的极化SAR图像分类

杨文; 钟能; 严天恒; 杨祥立

doi:10.12000/JR17031

基于黎曼流形的极化SAR图像分类

doi: 10.12000/JR17031

武汉大学电子信息学院武汉 430072

基金项目: 国家自然科学基金(61331016, 61271401)

详细信息

作者简介:
杨　文(1976–)，男，教授，博士生导师，2004年获得武汉大学工学博士学位。研究方向为图像处理与计算机视觉。E-mail: yangwen@whu.edu.cn

钟　能(1993–)，男，2015年获得吉林大学工学学士学位，现于武汉大学电子信息学院攻读硕士学位。主要研究方向为极化合成孔径雷达图像处理。E-mail: zn_whu@whu.edu.cn

严天恒(1995–)，女，2016年获得武汉大学工学学士学位，现于武汉大学电子信息学院信号处理实验室攻读硕士学位。主要研究方向为极化合成孔径雷达图像解译。E-mail: yanth_eis@whu.edu.cn

杨祥立(1991–)，男，2016年获得武汉大学工学硕士学位，现于武汉大学电子信息学院攻读博士学位。主要研究方向为极化合成孔径雷达图像处理。E-mail: xiangliyang@whu.edu.cn

通讯作者:
杨文 yangwen@whu.edu.cn

中图分类号: TN957
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出版历程
- 收稿日期: 2017-03-24
- 修回日期: 2017-06-08
- 网络出版日期: 2017-10-28

Classification of Polarimetric SAR Images Based on the Riemannian Manifold

School of Electronic Information, Wuhan University, Wuhan 430072, China

Funds: The National Natural Science Foundation of China (61331016, 61271401)

摘要

摘要: 分类是极化SAR图像解译的核心内容之一。一种新的思路是通过利用极化SAR协方差矩阵所形成的黎曼流形结构特性进行极化SAR图像分类。该文首先回顾了极化SAR图像分析中常用的黎曼流形测度，然后论述了如何对黎曼流形上的极化协方差矩阵进行稀疏编码。在监督分类方面，基于核空间黎曼流形稀疏编码提出了融合空间信息的极化SAR图像监督分类方法；在非监督分类方面，基于黎曼稀疏编码提出了利用黎曼稀疏诱导相似度的极化SAR图像非监督分类方法。在EMISAR和AIRSAR极化数据上的实验结果表明了该文所提方法的有效性。
- 极化SAR /
- 图像分类 /
- 黎曼流形 /
- 稀疏编码
Abstract: Classification is one of the core components in the interpretation of Polarimetric Synthetic Aperture Radar (PolSAR) images. A new PolSAR image classification approach employs the structural properties of the Riemannian manifold formed by PolSAR covariance matrices. In this paper, we first review the Riemannian manifold metrics generally used in PolSAR image analysis. Then, we describe a sparse coding method for the covariance matrices in the Riemannian manifold. For supervised classification, we propose a PolSAR image classification method that considers spatial information based on kernel space sparse coding. As for unsupervised PolSAR image classification, a method that takes advantage of Riemannian sparse induced similarity is proposed. Experimental results on EMISAR and AIRSAR data demonstrate the effectiveness of the proposed methods.
- Polarimetric SAR (PolSAR) /
- Image classification /
- Riemannian manifold /
- Sparse coding

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图 1 EMISAR数据的实验结果

Figure 1. The experiment results of EMISAR data

下载: 全尺寸图片幻灯片

图 2 AIRSAR数据的实验结果

Figure 2. The experiment results of AIRSAR data

下载: 全尺寸图片幻灯片

表 1 EMISAR数据监督分类结果

Table 1. The supervised classification results of EMISAR data

方法	针叶林	小麦	油菜	燕麦	黑麦	OA	Kappa
Wishart方法	0.9370	0.9527	0.9466	0.9843	0.9904	0.9713	0.9623
稀疏表达方法	0.9996	0.9860	0.9479	0.8946	0.9621	0.9472	0.9304
KSC方法	1	1	0.9960	0.9982	0.9975	0.9981	0.9975

下载: 导出CSV

表 2 AIRSAR数据非监督分类结果

Table 2. The unsupervised classification results of AIRSAR data

方法	OA	F1-score	Purity	Entropy
Wishart方法	0.6265	0.6084	0.7324	0.2909
Bartlett方法	0.6538	0.6376	0.8015	0.2353
RSC方法	0.8485	0.8633	0.9047	0.1344

下载: 导出CSV

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