复杂场景下的SAR图像水域边缘特征提取

摘要

The water area of synthetic aperture radar (SAR) images have very high remote sensing and geographical application value.Aiming at the speckle and strong scattering in SAR images,the edge feature extraction method of the SAR image in the complex scene is proposed.This method prepares the SAR image by constructing a two-dimensional histogram of the SAR image,which suppresses the influence of the speckle noise.Based on the different scattering characteristics between the man-made objects and the water area in the SAR image,strong scattering points are suppressed.The results show that the method can effectively reduce the interference of the strong scattering points and the speckle of man-made objects such as buildings.%合成孔径雷达(SAR)图像中的水域具有极高的遥感应用及地理应用价值;针对SAR图像固有的相干斑以及复杂场景下SAR图像水域边缘检测算法受到建筑物等人造地物强散射点干扰造成虚假边缘的问题,提出了复杂场景下SAR图像水域边缘特征提取方法;该方法通过构建SAR图像的二维灰度直方图对SAR图像进行预处理,一定程度抑制了相干斑噪声对边缘检测的影响,并在分析SAR图像中建筑物等人造地物与水域散射特性差异基础上利用二维灰度直方图对SAR图像进行分割,抑制强散射点;通过实验验证,该方法有效抑制了相干斑以及建筑物等人造地物强散射点的干扰,实现了复杂场景下的SAR图像水域边缘特征自动提取.