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Exploration of Synthetic Aperture Radar (SAR) Images

Contact: 
Background: 

Exploration of Synthetic Aperture Radar (SAR) images poses some unique challenges for interactive applications.

The dynamic range of the amplitude values is much larger than the dynamic range of common display devices. Specialized dynamic range reduction methods are required, both global and locally adaptive. Furthermore, due to the coherent illumination used in SAR systems, SAR images are inherently affected by a high amount of multiplicative speckle noise. This may hinder the interpretation and analysis of the images. A visualization system must therefore offer adjustable despeckling methods.

We developed interactively adjustable processing techniques for these purposes and implemented them in an interactive visualization system based on graphics processing units (GPUs). The system uses level-of-detail techniques to handle the typically very large, high-resolution data sets. It also allows georeferenced SAR images to be used as layers in a more general framework for interactive visualization of remote sensing data.

Free source code for most of these methods is available at http://ecm-planet.sourceforge.net/.

This research project was partially funded by grant KO-2960-3/1,2 from the German Research Foundation (DFG).

A SAR image overlayed over other remote sensing data.
A high resolution SAR image taken by the TerraSAR-X satellite.
An overlayed SAR image showing some automatically detected features.
Publications: 


2011

Doktorarbeiten

[bib] - Martin Lambers - Interactive Visualization of Remote Sensing Data
In Phd Thesis, University of Siegen, 2011 - [pdf]

2010

Begutachtete Konferenzbeiträge

[bib] - M. Lambers, A. Kolb - Visual Assistance Tools for Interactive Visualization of Remote Sensing Data
In Proc. Int. IEEE Geoscience and Remote Sensing Symposium (IGARSS), 2010, pages 4745-4748 - [pdf]

2009

Begutachtete Konferenzbeiträge

[bib] - M. Lambers, A. Kolb - GPU-Based Framework for Distributed Interactive 3D Visualization of Multimodal Remote Sensing Data
In Proc. Int. IEEE Geoscience and Remote Sensing Symposium (IGARSS), 4, 2009, pages IV-57 - IV-60 - [pdf]

2008

Artikel in Zeitschriften

[bib] - M. Lambers, H. Nies, A. Kolb - Interactive Dynamic Range Reduction for SAR Images
In Geoscience and Remote Sensing Letters, 5(3), 2008, pages 507-511 - [pdf]

Begutachtete Konferenzbeiträge

[bib] - M. Lambers, A. Kolb - Adaptive Dynamic Range Reduction for SAR Images
In Proc. 7th European Conference on Synthetic Aperture Radar (EUSAR), 3, 2008, pages 371-374 - [pdf]

Begutachtete Konferenzbeiträge

[bib] - M. Lambers, A. Kolb - Automatic Point Target Detection For Interactive Visual Analysis of SAR Images
In Proc. Int. IEEE Geoscience and Remote Sensing Symposium (IGARSS), 2, 2008, pages II-903 - II-906 - [pdf]

2007

Begutachtete Konferenzbeiträge

[bib] - M. Lambers, A. Kolb, H. Nies, M. Kalkuhl - GPU-based Framework for Interactive Visualization of SAR Data
In Proc. Int. IEEE Geoscience and Remote Sensing Symposium (IGARSS), 2007, pages 4076 - 4079 - [pdf]

Begutachtete Konferenzbeiträge

[bib] - M. Kalkuhl, P. Droste, W. Wiechert, H. Nies, O. Loffeld, M. Lambers - Parallel Computation of Synthetic SAR Raw Data
In Proc. Int. Geoscience and Remote Sensing Symposium (IGARSS), 2007, pages 536-539 - [pdf]