针对道路在高分辨率SAR图像中所具有的影像特征,提出了一种基于平行线对检测的高分辨率SAR图像主干道路自动提取算法。该算法以提出的新的平行线定义为核心,结合Marr视觉理论,使用自下而上的控制策略,对高分辨率SAR图像依次进行低层次的边缘检测(基于ROEWA算子)、中层次的道路特征结构化(平行线对检测)以及高层次的道路识别(路段生长、连接及去除伪道路),并在实验中给出了相应的算法演示结果图。实验结果表明,该算法能够准确有效地提取和定位高分辨率SAR图像中的主干道路。
An algorithm based on the detection of parallel pairs is proposed in this paper,which is according to the characters of roads in high-resolution synthetic aperture radar(SAR) images.The new definition of parallel and bottom-up control strategy are proposed.The algorithm consists of a low-level process for edge detection(based on ratio of exponentially weighted averages operator),a mid-level process for the formation of road structure(parallel pairs detection),and a high-level process for the road recognition(the growth and linking of road segments and removing false roads).In addition,relevant figures are also provided.The experimental results show that the proposed algorithm can effectively extract main roads from high-resolution SAR images.