一种改进的频域相关法复图像快速配准  

Fast Image Registration in SAR Interferometry Based on Frequency-Domain Correlation

作　　者：崔岑[1] 赵淑清[1] 张剑琦[1] 

机构地区：[1]哈尔滨工业大学(威海)信息科学与工程学院,山东威海264209

出　　处：《测绘科学技术学报》2011年第3期204-207,共4页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金资助项目(60872100)

摘　　要：InSAR复图像配准是合成孔径雷达3维成像技术的一个关键步骤,要求达到亚像素级的配准精度。在分析了传统相关系数法的基础上,提出了改进的基于频域相关的快速配准算法。该方法分别采用频域相关和线性调频Z变换进行粗配准和精配准;最后利用傅里叶变换的平移性质对辅图像插值重采样。应用该算法对实际数据进行了实验,并从配准时间和精度两方面进行了分析。实验结果证明该方法在保证配准精度的同时,能够有效减少运算量,大大提高运算效率。The registration for complex images is an important step on processing technology of 3D imaging in interferometric synthetic aperture radar,and it is desired to have the sub-pixel precision of registration.On the basis of analysing the traditional correlation coefficient method,a fast registration method used frequency-domain correlation coefficient and chirp Z transform respectively for coarse and fine registration was proposed,and resampled the interpolated slave image by the translation property of FT finally.Real data were chosen to perform the above mentioned algorithms,and meanwhile the runtime and precision were analyzed.The results proved that the algorithm was valid,robust and efficient.

关 键 词：合成孔径雷达干涉测量 图像配准 频域相关 线性调频Z变换 干涉图 

分 类 号：P237[天文地球—摄影测量与遥感]