一种改进的图像域SAR目标散射中心特征提取方法

散射中心是SAR图像目标识别的重要特征。本文基于属性散射中心模型，在文献6]的基础上，提出了一种改进的图像域SAR目标散射中心特征提取方法。在该方法中，通过引入参数规则化处理步骤，解决了属性散射中心特征提取方法的收敛问题，提高了属性散射中心特征参数估计的精度和效率；提出了一种能同时实现散射中心数目确定和结构判别的方法，实现了散射中心类型的可靠判别。仿真数据和MSTAR实测SAR图像数据的实验结果，验证了本文改进的图像域SAR目标散射中心特征提取方法的有效性。

A Modified Method of Extracting SAR Target Scattering Center Features from Imagery Domain

Scattering center is an important feature for SAR imagery target recognition. Based on attributed scattering center model, on the basis of reference 6], a modified method of extracting SAR target scattering center features from imagery domain is presented. According to this method, by introducing the parameter regularization, the convergence speed of attributed scattering center extraction is accelerated. The accuracy and efficiency of parameter estimation are improved. Also a method that can determine the number of scattering centers and distinguish their structure simultaneously is proposed, which realizes the reliable determination of the structure of scattering center. Finally the modified method is verified by the experimental results of simulated real MSTAR SAR imagery data.