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   -> Volume 10, Issue 4

Answer: Help about wavelets and images (WD 10.02 #27)
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Andreas Niedermeier (

PostPosted: Fri Oct 05, 2001 4:48 pm    
Subject: Answer: Help about wavelets and images (WD 10.02 #27)
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#24 Answer: Help about wavelets and images (WD 10.02 #27)

Hello Sileye-Oumar, hello waveleters

actually I just finished my PhD thesis (in german, english version
available in a few months) about a wavelet based waterline/coastline
extraction algorithm on synthetic aperture radar images of river estuaries
(exemplary using the German river Elbe). As input the original ESA SAR
amplitude images (32 bit uncompressed float data) are used, the software
runs partly in C (code from Mallat's dyadic transform at and IDL (postprocessing) on
workstations. For the moment the algorithm can be found in
A. Niedermeier, E. Romaneeßen, S. Lehner: Detection of Coastlines in
SAR Images using Wavelet Methods, IEEE-GRS, Vol.38, No. 5, Sept. 2000,
pp. 2270-2281.
Concerning the image file conversions I recommend `xv' or the IDL input
readers for JPEG, GIF, etc.

Andreas Niedermeier,
Remote Sensing Technology Institute at German Aerospace Center,
PhD student at Dep. of Math., Munich University of Technology., (1st hit on "Anderl Niedermeier" at Altavista)
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