一种基于斑点抑制的SAR图像舰船航迹检测算法

DETECTION ALGORITHM OF SHIP WAKES OF SAR IMAGE BASED ON THE SPECKLE NOISE SUPPRESSION

该文分析了合成孔径雷达(SAR)图像中舰船航迹的特性和斑点噪声模型及其局部统计特性。在此基础上,提出了一种先基于小波变换进行斑点噪声抑制,再基于Radon变换进行航迹检测的方法。对数据处理的结果表明,该方法较直接对SAR图像应用Radon变换能更有效、准确地检测到SAR图像中的舰船航迹。

The characteristics of ship wakes in SAR image is analyzed, the model of speckle noise and its local statistic characteristics are also analyzed. A ship wake detection algorithm is proposed in this paper, which based on wavelet transform to suppress the speckle noise firstly and Radon transform to detect the ship wakes secondly. The results of data procession show that the proposed method is more efficient and more accurate to detect the ship wakes in SAR images than that of applying Radon transform to SAR images directly.