[gdal-dev] Image segmentation

[Cuinet Jérôme]

So, it's like multispectral classification even if it can be processed 
theoretically with one band. We could not recongize this function under this 
name.


Jérôme
----- Original Message ----- 
From: "Markus Neteler" <neteler at osgeo.org>
To: "Frank Warmerdam" <warmerdam at pobox.com>
Cc: <gdal-dev at lists.osgeo.org>
Sent: Tuesday, April 21, 2009 9:35 PM
Subject: Re: [gdal-dev] Image segmentation


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

Best
Markus
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