Improving TanDEM-X DEMs by Non-local InSAR Filtering
Conference: EUSAR 2014 - 10th European Conference on Synthetic Aperture Radar
06/03/2014 - 06/05/2014 at Berlin, Germany
Proceedings: EUSAR 2014
Pages: 4Language: englishTyp: PDF
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Authors:
Zhu, Xiao Xiang; Bamler, Richard; Eineder, Michael (German Aerospace Center & Technische Universitaet Muenchen, Germany)
Lachaise, Marie (German Aerospace Center, Germany)
Adam, Fathalrahman; Shi, Yilei (Technische Universitaet Muenchen, Germany)
Abstract:
The standard TanDEM-X product meets HRTI-3 DEM specification and comes with a sample spacing of 12 m. In this paper we apply non-local means (NL) interferogram filtering to the TanDEM-X data. Our version of the NL filter is a modification of the original formulation and provides better noise reduction. Based on simulations, phase noise reduction, coherence estimation accuracy and spatial resolution of our NL filter are compared to conventional filters. Finally, the first TanDEM-X DEM with 6m resolution and low noise level is presented.