中文摘要：

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ENVISATASAR和ERS一2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。

英文摘要：

Synthetic Aperture Radar （SAR） provides abundant data for the research of eddies. It is important to effectively extract the information of eddies from the SAR images. In this paper, we present a method based on logarithmic spiral edge fitting for the extraction of information from SAR images, and it is capable of extracting the eddy center, eddy diameter, and the size of the eddy edge. Based on this method, an experiment is conducted to extract eddy information from a sequence of SAR images acquired by ENVISAT ASAR and ERS-2. The information pertaining to two eddies and their movements can be obtained. The validity of the method can be verified by making comparisons with the pseudo-color composite results.