基于改善极化相似性的极化SAR目标增强新方法  

Target Enhancement in POL-SAR Imagery Based on the Improvement of Polarization Characteristics Similarity

作　　者：徐牧[1] 王雪松[1] 肖顺平[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2008年第5期1047-1051,共5页Journal of Electronics & Information Technology

基　　金：新世纪优秀人才计划项目(NCET-04-0997);国家自然科学基金(60672033)资助课题

摘　　要：针对高分辨极化SAR目标增强问题,该文提出一种基于改善极化相似性的目标增强新方法。利用Huynen分解、极化方位角提取及极化方位角归零化处理消除了扰动分量、相干斑噪声及极化取向等因素对像素点极化特性的影响,改善了极化SAR图像同类区域内部像素点的极化相似性。与已有方法相比,该方法克服了区域内部像素点极化特性不一致对高分辨极化SAR目标增强的影响,可以获得理想的目标区域整体增强效果。利用全极化SAR实测数据验证了该文方法的优良性能。A novel scheme of target enhancement in high resolution polarimetric SAR imagery is proposed in this paper, which is based on the improvement of polarization characteristics similarity between pixels of the same region in the high resolution POL-SAR imagery. Huynen＇s decomposition, polarization orientation angle extraction and a further angle rotation transformation are employed to eliminate the effect of the speckle noise and random vector scattering on each pixel＇s polarization characteristics. Comparing with the existing target enhancement methods, the novel scheme can improve the polarization characteristics similarity of the pixels in the same region to get a promising target enhancement effect. The validity of the novel method is indicated by experimental results with fully polarimetric SAR data sets.

关 键 词：极化SAR 目标增强 极化相似性 极化方位角 

分 类 号：TN958[电子电信—信号与信息处理]