首页> 外文期刊>海洋学报(英文版) >The polarimetric features of oil spills in full polarimetric synthetic aperture radar images
【24h】

The polarimetric features of oil spills in full polarimetric synthetic aperture radar images

机译:全极化合成孔径雷达图像中溢油的极化特征

获取原文
获取原文并翻译 | 示例
       

摘要

Compared with single-polarized synthetic aperture radar (SAR) images, full polarimetric SAR images contain not only geometrical and backward scattering characteristics, but also the polarization features of the scattering targets. Therefore, the polarimetric SAR has more advantages for oil spill detection on the sea surface. As a crucial step in the oil spill detection, a feature extraction directly influences the accuracy of oil spill discrimination. The polarimetric features of sea oil spills, such as polarimetric entropy, average scatter angle, in the full polarimetric SAR images are analyzed firstly. And a new polarimetric parameterP which reflects the proportion between Bragg and specular scattering signals is proposed. In order to investigate the capability of the polarimetric features for observing an oil spill, systematic comparisons and analyses of the multipolarization features are provided on the basis of the full polarimetric SAR images acquired by SIR-C/X-SAR and Radarsat-2. The experiment results show that in C-band SAR images the oil spills can be detected more easily than in L-band SAR images under low to moderate wind speed conditions. Moreover, it also finds that the new polarimetric parameter is sensitive to the sea surface scattering mechanisms. And the experiment results demonstrate that the new polarimetric parameter and pedestal height perform better than other polarimetric parameters for the oil spill detection in the C-band SAR images.
机译:与单极化合成孔径雷达(SAR)图像相比,全极化SAR图像不仅包含几何和后向散射特征,而且还包含散射目标的偏振特征。因此,极化SAR在海面漏油检测方面具有更多优势。作为漏油检测的关键步骤,特征提取直接影响漏油判别的准确性。首先分析了全极化SAR图像中海洋溢油的极化特征,如极化熵,平均散射角。并提出了一个新的极化参数P,它反映了布拉格和镜面散射信号之间的比例。为了研究极化特征观测溢油的能力,在SIR-C / X-SAR和Radarsat-2采集的全极化SAR图像的基础上,对多极化特征进行了系统的比较和分析。实验结果表明,在中低风速条件下,C波段SAR图像中的漏油比L波段SAR图像中的漏油更容易检测到。此外,还发现新的极化参数对海面散射机制敏感。实验结果表明,对于C波段SAR图像中的漏油检测,新的极化参数和基座高度比其他极化参数性能更好。

著录项

  • 来源
    《海洋学报(英文版)》 |2017年第5期|105-114|共10页
  • 作者单位

    College of Information Science and Engineering,Ocean University of China,Qingdao 266100,China;

    College of Information Science and Engineering,Ocean University of China,Qingdao 266100,China;

    College of Information Science and Engineering,Ocean University of China,Qingdao 266100,China;

    The First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China;

    The First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China;

  • 收录信息 中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-19 03:57:50
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号