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遥感技术与应用  2013, Vol. 28 Issue (4): 618-626    DOI: 10.11873/j.issn.1004-0323.2013.4.618
图像与数据处理     
基于FFT平移与相关分析的多尺度星载SAR自动配准
汤益先1,赫永杰2,张红1,王超1
(1.中国科学院遥感与数字地球研究所数字地球重点实验室,北京 100094;
2.北京交通大学理学院,北京 100044)
An Auto-registration Method for Space-borne SAR Images based FFT-shift Theory and Correlation Analysis in Multi-scale Scheme
Tang Yixian1,He Yongjie2,Zhang Hong1,Wang Chao1
(1.Key Laboratory of Digital Earth Science,Insitute of Remote Sensing
and Digital Earth,Chinese Acadmy of Sciences,Beijing 100094,China;
2.Beijing Jiaotong University,School of Science in Optical Engineering,Beijing 100044,China)
 全文: PDF(5602 KB)  
摘要:

SAR图像配准是SAR图像应用,尤其是时间序列SAR图像应用的重要处理步骤之一。为实现重复星载SAR图像的快速、自动配准,通过将小波多尺度变换与快速傅立叶频谱变换相结合,实现了对星载SAR图像间初始偏移的快速估计,并在此基础上利用基于窗口的相关分析,实现了SAR图像的精确配准。选用星载ALOS-PALSAR和Radarsat-2影像作为试验数据,对提出的方法进行了实验分析。实验结果表明:该方法在无需任何先验知识的情况下,可以全自动完成重复轨道星载SAR数据的快速配准,且精度满足SAR干涉处理等时间序列SAR应用处理的需求,具有较强的鲁棒性。

关键词: 合成孔径雷达(SAR)图像配准小波变换快速傅立叶变换相关分析    
Abstract:

SAR co-registration is one of the crucial steps in the process of SAR images analysis,especially for multi-temporal SAR images analysis.Focusing on the characteristics of the repeat-pass space-borne SAR image,an auto-registration method for repeat-pass SAR complex image pair is proposed based on a multi-steps,which combines the Fourier transform and correlation-coefficient algorithm in multi-scale scheme.Firstly,an initial offset is estimated in Fourier domain by using the 3rd level wavelet decomposition image.Then,taking these initial offsets into account,coarse and fine registration is applied to the whole image and the oversampled image successively by correlation analysis of the images on several windows distributed randomly.ALOS-PALSAR and Radarsat-2 data are used for validation of this registration method.And the experimental results show that the proposed technique achieves the co-registration of the SAR images with the accuracy up to a fraction of a pixel automatically without a priori knowledge and this approach is efficient.

Key words: SAR    Registration    Wavelet Transform    FFT    Correlation-Coefficient Analysis
收稿日期: 2012-05-15 出版日期: 2013-08-14
:  TP 79  
基金资助:

国家自然科学基金项目“基于分布目标的高分辨率SAR北川震后滑坡监测”(41271425)。

作者简介: 汤益先(1978-),男,四川成都人,助理研究员,主要从事SAR图像处理及InSAR,PSI相关技术的研究与应用。E-mail:yxtang@ceode.ac.cn。
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引用本文:

汤益先,赫永杰,张红,王超. 基于FFT平移与相关分析的多尺度星载SAR自动配准[J]. 遥感技术与应用, 2013, 28(4): 618-626.

Tang Yixian,He Yongjie,Zhang Hong,Wang Chao. An Auto-registration Method for Space-borne SAR Images based FFT-shift Theory and Correlation Analysis in Multi-scale Scheme. Remote Sensing Technology and Application, 2013, 28(4): 618-626.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2013.4.618        http://www.rsta.ac.cn/CN/Y2013/V28/I4/618

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