针对低信噪比雷达图像的特点,在Radon变换的基础上利用机场目标和背景的雷达成像知识对Radon变换的结果进行后处理,以便可靠地提取雷达图像中的机场目标。为了对机场进行定位,给出了一种确定线特征端点的简单有效的方法。同时给出了一种距离变换准则来衡量提取到的线特征和真实线特征的相似度。实验表明,该方法能更可靠地提取雷达图像中的机场目标。 Aiming at the characteristics of low SNR image, Radon transform is used to postprocess the results of Radon transform based on Radon transform and radar knowledge of the background of the airport so as to extract the airport targets reliably. In order to locate the airport, a simple and effective method to determine the endpoints of line features is given. At the same time, a distance transformation criterion is given to measure the similarity between the extracted line features and the true line features. Experiments show that this method can extract the airport target in radar image more reliably.