LIU Xiang-zeng, TIAN Zheng, SHI Zhen-guang, CHEN Zhan-shou. SAR image multi-scale registration based on FKICA-SIFT features[J]. Editorial Office of Optics and Precision Engineering, 2011,19(9): 2186-2196
LIU Xiang-zeng, TIAN Zheng, SHI Zhen-guang, CHEN Zhan-shou. SAR image multi-scale registration based on FKICA-SIFT features[J]. Editorial Office of Optics and Precision Engineering, 2011,19(9): 2186-2196 DOI: 10.3788/OPE.20111909.2186.
SAR image multi-scale registration based on FKICA-SIFT features
In order to realize automatic registration of a Synthetic Aperture Radar(SAR) image
an approach of image multi-scale registration based on affine invariant Fast Kernel Independent Component Analysis-Scale Invariant Feature Transform(FKICA-SIFT) features is presented. First
the affine invariant SIFT descriptors are constructed according to the Hessian matrix of feature points. The FKICA is used to extract the independent components of the affine invariant SIFT descriptors to obtain new descriptors (FKICA-SIFT). After filtering the input images by using Steerable pyramid
the new descriptors are used to match the feature points detected from the synthetic images of the band-pass sub-images in each layer. Finally
a coarse-to-fine procedure is adopted for gradual optimizing transformation parameters to achieve the multi-scale registration results. Experimental results show that the correct matching rate of proposed algorithm is more than 85% when the threshold is less than 0.7 and that is more than 90% when the threshold is less than 0.5. The registration accuracy of the proposed algorithm can achieve sub-pixel level and it is better than those of SIFT
PCA-SIFT
ICA-SIFT and SURF methods. It has been applied to accurate detection of the changes of the Tangjiashan waters before and after the Wenchuan earthquake
and obtained results meet the requirements of accurate registration for SAR images.
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references
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