perko_2011_IGARSS_presentation_v2.ppt

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The document proposes using TerraSAR-X radar imagery to calibrate the geo-location accuracy of optical satellite sensors. It presents an automatic workflow to register optical orthoimages to TerraSAR-X references using bilateral filtering and mutual information matching. Initial displacements of 20-40m in optical data were reduced to below 5m, verifying TerraSAR-X provides an accurate reference for calibration.

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Using worldwide available TerraSAR-X data to calibrate the geo-location accuracy of optical sensors R. Perko , H. Raggam, KH. Gutjahr, M. Schardt IGARSS – Vancouver - July 2011

Motivation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],TerraSAR-X imagery Automatic optical to SAR matching technique

Example ,[object Object],Systematic shift of about 40 meters

TerraSAR-X as Reference Data ,[object Object],[object Object],[object Object],[object Object],[Bresnahan, 2009; Raggam et al., 2010] [Krieger et al., 2005] Bi-static mode ,[object Object],[object Object]

Proposed Workflow ,[object Object],Optical ortho image Reference TerraSAR-X image Registered optical ortho image Image matching Image registration „ unknown“ accuracy known accuracy

SAR to Optical Matching ,[object Object]

Algorithm: Pre-processing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[Tomasi and Manduchi, 1998]

Algorithm: Pre-processing ,[object Object],original filtered TerraSAR-X Ortho photo [150x150 pixels @ 5m GSD]

Algorithm: Image Matching ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[Pluim et al., 2003]

SAR specific Aspects ,[object Object],[object Object],[object Object],SAR ascending SAR descending Ortho photo [80x64 pixels @ 5m GSD]

Test Data & Setup ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Results: Visual Interpretation Spot 5 Ikonos PAN RapidEye Ortho photo TerraSAR-X initial matching [75x75 pixels @ 5m GSD]

Results: Numerical Analysis ,[object Object],[object Object],[m]

Results: Numerical Analysis ,[object Object],[object Object],[object Object],[object Object],[m]

Conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Contact DIGITAL - Institute for Information and Communication Technologies JOANNEUM RESEARCH Forschungsgesellschaft mbH Steyrergasse 17, A-8010 Graz, AUSTRIA E-mail: roland.perko@joanneum.at Web: http://www.joanneum.at/digital Roland Perko, PhD

Motivation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],TerraSAR-X imagery Automatic SAR to optical matching technique

Algorithm: Pre-processing ,[object Object],[object Object],[object Object],original filtered TerraSAR-X Ortho photo [150x150 pixels @ 5m GSD]

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perko_2011_IGARSS_presentation_v2.ppt

1. Using worldwide available TerraSAR-X data to calibrate the geo-location accuracy of optical sensors R. Perko , H. Raggam, KH. Gutjahr, M. Schardt IGARSS – Vancouver - July 2011

10.

11.

12.

13.

14.

15.

16. Results: Visual Interpretation Spot 5 Ikonos PAN RapidEye Ortho photo TerraSAR-X initial matching [75x75 pixels @ 5m GSD]

17.

18.

19.

20. Using worldwide available TerraSAR-X data to calibrate the geo-location accuracy of optical sensors R. Perko, H. Raggam, KH. Gutjahr, M. Schardt IGARSS – Vancouver - July 2011

21. Contact DIGITAL - Institute for Information and Communication Technologies JOANNEUM RESEARCH Forschungsgesellschaft mbH Steyrergasse 17, A-8010 Graz, AUSTRIA E-mail: roland.perko@joanneum.at Web: http://www.joanneum.at/digital Roland Perko, PhD

22. Example: Non-linear distortion

23. Bilateral Filtering for SAR data

24.

25. Outlook

26.

27.

perko_2011_IGARSS_presentation_v2.ppt

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