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SAR-SIFT for matching multiple SAR images and radargrammetry

: Dubois, Clémence; Nascetti, Andrea; Thiele, Antje; Crespi, Mattia; Hinz, Stefan


Photogrammetrie, Fernerkundung, Geoinformation 85 (2017), No.3, pp.149-158
ISSN: 1432-8364
Journal Article
Fraunhofer IOSB ()
SAR-SIFT applications; 2D/3D tie points; accuracy assessment; radargrammetry; stereo

This article presents a new application of the SAR-SIFT algorithm proposed by Dellinger et al. (IEEE Trans Geosci Remote Sens 53:453–466, 2015) for the automatic generation of tie points (TPs). In particular, SAR-SIFT is applied on stereo-SAR images to extract corresponding points and determine their 3D position. Furthermore, the potential of the combined use of the SAR-SIFT with the SAR-stereo model for extracting reliable TPs is analysed, by evaluating their absolute accuracy in 2D and 3D. The tests are performed with TerraSAR-X HR SpotLight data acquired over Trento, Italy. Single and multiple image pairs have been considered. 3D accuracy assessment of the extracted points is performed relying on LiDAR data; the results show a planimetric accuracy up to 1 m and an elevation accuracy of about 2 m.