测绘学报

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SAR波长对遥感图像统计特征的影响

刘国良1,黄爱民2   

  1. 1. 国防科技大学三院六队
    2. 国防科技大学 机电工程与自动化学院
  • 收稿日期:2011-02-21 修回日期:2011-05-18 出版日期:2012-02-25 发布日期:2012-02-25
  • 通讯作者: 刘国良

The Effect of SAR Wavelength on Remote Sensing Image Statistical Features

1, 2   

  1. 1.
    2. College of Mechatronics Engineering and Automation, National University of Defense Technology
  • Received:2011-02-21 Revised:2011-05-18 Online:2012-02-25 Published:2012-02-25

摘要: 遥感图像统计特征在目标辨识、图像配准以及图像分类等任务中扮演着重要角色。传统的统计特征鲁棒性分析一般是基于图像具有同一传感器参数的假设。而在现实任务中,往往需要处理由不同传感器参数拍摄的遥感图像,比如不同波长或入射角度等。传感器参数不同会导致图像灰度与表象特征不同,进一步会影响到统计特征表达。因此有必要系统研究常用统计特征与传感器参数之间的相关性,从而实现更加鲁棒的图像处理与分析。本文研究了目前常用的六种图像统计特征,在合成孔径雷达(SAR)波长变化时(L波段、C波段和X波段)的鲁棒性。实验中,对鲁棒性能指标作出定义,并对不同统计特征的鲁棒性做出了比较与分析。实验结果发现,不同统计特征对波长变化的鲁棒性不同,同时图像特征在不同地形时随波长变化的规律也不一致。本文的研究成果对基于SAR图像的判读、景象匹配制导以及景象适配性分析等具有重要的指导意义。

Abstract: The statistical feature of the remote sensing image plays an important role for image recognition, image registration and image classification. The traditional robustness analysis of statistical feature is generally based on that the remote sensing images have same sensor parameters. However, this is not true in many practical applications, where the sensors may have different sensor parameters, e.g., wavelength and incidence angle etc. Due to various types of sensor parameters, the remote sensing image will have different appearance. This will further affect the statistical features. Therefore, in order to achieve more robust image processing and analysis, it's necessary to investigate the correlations between the statistical features used in the state of the art and the sensor parameters. In this paper, we research on the robustness of six kinds of statistical features against the wavelength (L-band, C band and X band) of the synthetic aperture radar (SAR). First the measurement of robustness of statistical features is defined, and then the comparison and analysis are presented in our experiment. In addition, our experiment also shows that statistical features of different terrains have different change while wavelength changes. The results of this paper also play a very important role in the SAR image based interpretation, image matching guidance and scene adaptability analysis.