[GRASS5] r.wavelet

[Andrea Antonello]

Hi Sajith,

>        I am planing to do some image processing based on wavelet.
> I checked the r.wavelet module in the grass addon section, but it is made
> for grass 4(?). I wish to upgrade it to the present grass version.

the modules were made for the grass5 version. I got in touch only once again 
with the wavelets modules in grass6, where they gave some strange output, but 
at that time I had no second free to understand what it was. Since the raster 
api didn't change (someone correct me if it's not true), those modules should 
work out of the box.

> I am not a grass developer now, and I dont know the changes in grass
> libraries between version 4 and 6.
> Can some one guide me on how to proceed?

What do you mean? Compilation into the release or usage?
The man pages in the package should fullfill the second.
However for a first quick use:
r.biowave.dec input=<mapname> output=<outputname> filter1=sp02.ir 
filter2=sl05.ir filterpath=<folder where the filters (sp02.ir and sl05.ir) 
are with / at the end>  NumRec=3

This will perform a 3 step wavelets decomposition. 
The maps will be created and the names are selfexplanatory.

If I remeber correct, the starting map has to be floating point, else there 
will be strange results.

Cheers,
Andrea



-- 
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HydroloGIS - Environmental Open Source Solutions
www.hydrologis.com

Andrea Antonello
Environmental Engineer
mobile:  +393288497722

"Let it be as much a great honour to take as to give learning,
if you want to be called wise."
Skuggsja' - The King's mirror - 1240 Reykjavik
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