UWB-SAR图像中二面角目标的检测

The Utlization of Directional Characteristic in ATD of Wide Processing-Angle UWB-SAR

目标的散射特性常依赖于雷达和目标间的姿态角 ,该依赖性在大积累角的UWB -SAR(UltraWide -BandSAR)中尤为明显 ,但是经过成像处理 ,这种关系在图像中被掩盖了。通过分析SAR图像的频谱特点 ,提出一种方向滤波与双参数恒虚警检测相结合的方法 ,利用目标响应的方向性检测大处理角UWB -SAR图像中的目标点。对仿真数据处理的结果表明 ,该方法具有结构简单。

The object's scattering characteristic is often dependent on target-radar orientation. The characteristic is prominent especially in the wide processing-angle UWB-SAR. But it is concealed in the SAR image after imaging. By analyzing the charactaristic of 2-D frequency domain of SAR images, this paper proposes a method combining CFAR with directional filtering to detect the target like points in the SAR image. The simulation result shows that it is effective.