基于对数螺旋线边缘拟合的SAR 图像漩涡信息提取方法

基金项目:

国家自然科学基金(41276185)资助课题

A Method Based on Logarithmic Spiral Edge Fitting for Information Extraction of Eddy in the SAR Image

1.
(National Key Laboratory of Science and Technology on Microwave Imaging, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
2.
(University of Chinese Academy of Sciences, Beijing 100049, China)

摘要: 合成孔径雷达(SAR)为漩涡研究提供了大量数据，如何有效提取SAR 图像中漩涡的信息十分重要。该文提出了一种基于对数螺旋线边缘拟合的SAR 图像漩涡信息提取方法，用于提取中心位置、直径、边缘尺寸等漩涡信息。基于此方法，该文利用ENVISAT ASAR 和ERS-2 获得的时序SAR 图像进行了漩涡信息提取实验，得到了漩涡的信息及其变化趋势，并与伪彩色合成结果进行对比，验证了该方法的有效性。
- 漩涡 /
- SAR 图像 /
- 边缘拟合 /
- 信息提取
Abstract: The Synthetic Aperture Radar (SAR) provides abundant data for the research of eddies. It is important to extract the information of eddies in the SAR image effectively. In this paper, a method based on logarithmic spiral edge fitting for information extraction of eddy in the SAR image is presented, which is capable to extract the eddy center, eddy diameter, and the size of eddy edge. Based on this method, an experiment is conducted to extract the information of eddy in the sequential SAR images acquired by ENVISAT ASAR and ERS-2. The information of two eddies and their movement can be achieved. The validity of the method can be verified by comparing with the pseudo-color composite results.
- Eddy /
- Synthetic Aperture Radar (SAR) image /
- Edge fitting /
- Information extraction