Study on co-registration method based on correlation coefficient for InSAR signal processing

Abstract — The paper discussed and analyzed 4 calculation methods of correlation coefficient. The computation, evaluation effects, the merits and shortcomings of these methods were compared. An orient weighing calculation method was proposed because the signal noise ratio is not same for all interferometric data. It gave heavy weight to high SNR data and gave slight weight to polluted data. It would get a more reasonable correlation coefficient. When interferometric fringe is thick and correlation window is small, it would restrain noise at edge of interferometric stripe and get better co-registration effect. The paper verified the algorithm with ERS-1/2 data, gave out offset of fine co-registration and interferometric image.

[1]  Alberto Moreira,et al.  Coregistration of interferometric SAR images using spectral diversity , 2000, IEEE Trans. Geosci. Remote. Sens..

[2]  Giorgio Franceschetti,et al.  X-SAR interferometry: first results , 1995, IEEE Trans. Geosci. Remote. Sens..

[3]  Giorgio Franceschetti,et al.  Image registration in interferometric SAR processing , 1995 .

[4]  R. Goldstein,et al.  Crossed orbit interferometry: theory and experimental results from SIR-B , 1988 .

[5]  Howard A. Zebker,et al.  New approaches in interferometric SAR data processing , 1992, IEEE Trans. Geosci. Remote. Sens..

[6]  Luciano Vieira Dutra,et al.  Generation of digital elevation models by using SIR-C/X-SAR multifrequency two-pass interferometry: the Etna case study , 1996, IEEE Trans. Geosci. Remote. Sens..

[7]  Alberto Moreira,et al.  A new method for accurate co-registration of interferometric SAR images , 1998, IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174).