Title :
Beyond the 12m TanDEM-X DEM
Author :
Xiao Xiang Zhu ; Lachaise, Marie ; Adam, Fathalrahman ; Yilei Shi ; Eineder, Michael ; Bamler, Richard
Author_Institution :
Remote Sensing Technol. Inst. (IMF), German Aerosp. Center (DLR), Oberpfaffenhofen, Germany
Abstract :
The standard TanDEM-X product meats HRTI-3 DEM specification and comes with a sample spacing of 12 m. We apply non-local means (NL) interferogram filtering to the TanDEM-X data. In this paper, we present modifications of the original NL filter which render it more appropriate and efficient for massive processing of TanDEM-X data. Further, we investigate the noise reduction properties as well as the resolution and the coherence estimation accuracy of the new NL filter. Simulations and tests with TanDEM-X data hint that the improved DEMs possess a quality close to the HRTI-4 standard. Also future global InSAR missions like Tandem-L will greatly benefit from this type of filters.
Keywords :
digital elevation models; noise; radar interferometry; synthetic aperture radar; 12M TanDEM-X DEM; HRTI-3 DEM specification; HRTI-4 standard; NL interferogram filtering; TanDEM-X data; TanDEM-X data simulation; TanDEM-X data test; Tandem-L; coherence estimation accuracy; filter type; future global InSAR mission; improved DEM; massive TanDEM-X data processing; noise reduction property; nonlocal mean interferogram filtering; original NL filter modification; resolution estimation accuracy; sample spacing; standard TanDEM-X product; Accuracy; Adaptive filters; Coherence; Noise measurement; Noise reduction; Optical filters; Standards; DEM; HRTI-4; TanDEM-X; nonlocal means filter;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International
Conference_Location :
Quebec City, QC
DOI :
10.1109/IGARSS.2014.6946440
