摘要
多视处理是减小相干斑噪声对图像质量影响的常用方法。常用的多视处理方法有基于多普勒子带划分的子孔径多视处理方法和基于空域平均的多视处理方法。使用等效视图数等评价指标,对两种方法生成的图像相关和平滑程度进行对比,发现在子带重叠度为β=0.2时取得最佳滤波效果。最后对提出的多视处理方法和估计方法进行了实测数据验证。结果表明基于子带重叠的子孔径多视处理方法更具有有效性,比较适用于对SAR图像的多视处理研究。
Multilook processing is a basic method for speckle reduction of Synthetic aperture radar（SAR）images.The commonly subband extraction strategy are frequency subband extraction and spatial domain average processing.In the first method,the frequency domain is divided into multiple subbands.Each subband is used to generate a look,and all the looks are averaged incoherently to obtain the final image.The evaluation index,such as ENL（Equivalent Number of Looks）,are used to compare the image correlation and smooth degree of two methods and put forward an optimization algorithm of the bandwidth splitting in the subband extraction is introduced in this paper.Experiments show that the subaperture overlap method has a better performance in speckle reduction compared with the traditional multilook processing.
出处
《舰船电子工程》
2016年第2期46-49,共4页
Ship Electronic Engineering
基金
国家自然基金项目(编号:61372165)
湖北省自然科学基金项目(编号:2012FB06902)资助
