[gdal-dev] Image segmentation

[Francesco P. Lovergine]

On Tue, Apr 21, 2009 at 09:35:13PM +0200, Markus Neteler wrote:
> On Tue, Apr 21, 2009 at 7:01 PM, Frank Warmerdam <warmerdam at pobox.com> wrote:
> > Giacomo Piva wrote:
> >>
> >> Hi All,
> >> I'm looking for a function that create an image segmentation.
> >> Is there a function in the GDAL collection that permit to do that?
> >
> > Giacomo,
> >
> > No, I don't believe there is.
> >
> > By segmentation do you mean single band reclassification (ie. values
> > 0-10 map to 1, values 20-35 map to 2, etc)?   Or are you thinking of
> > multispectral classification?  Or perhaps something else?
> 
> Image segmentation is the spatial partitioning of an image typically.
> 
> > In any event, there is nothing in GDAL itself to do any of these.
> 
> In GRASS you can find it:
> http://grass.osgeo.org/grass64/manuals/html64_user/i.smap.html
> 

There are other libraries that implement image segmentation.                                                                                                 
Among others, ITK and OpenCV. They are not specifically oriented                                                                                             
to satellite images anyway, so they could be adequate or not for
your purposes.

-- 
Francesco P. Lovergine