[R-sig-Geo] Image Classification - Wish List?

[Rainer M Krug]

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On 04/04/12 14:16, Eric Momsen wrote:
> Hello all,
> 
> I'm looking for some feedback and ideas regarding the need to improve image classification 
> abilities in GRASS GIS.  My understanding is that since the required classification techniques 
> aren't available in GRASS, the researchers doing that work are found elsewhere.  Hopefully
> this is a good place to find those experts?
> 
> For those that aren't already aware of it, Google Summer of Code provides support for students 
> to spend the summer programming for Open Source software projects.  The GRASS GIS idea list 
> included the following items that caught my eye:
> 
> 4. Implement image segmentation algorithms and tools 5. Implement region-based classification 
> 6. Implement hierarchical classification tools (e.g. being able to create a large class 
> "forest", with subclasses of different types of forests)
> 
> The methods currently implemented in GRASS are at: 
> http://grass.osgeo.org/wiki/Image_classification
> 
>> From discussions on the grass-dev mail list, I understand that
> some/many of the new algorithms to meet these needs are implemented in R and other software.
> 
> I'm wondering:

I can not answer you directly (as I hav no idea about image classification) but I use GRASS from
R, trhe other way around, and it works very nice. I had the idea in the past, that the same should
be possible to be done easily from GRASS: use R to do map analysis in the background, so that the
"normal" GRASS user doesn't even need to be aware that a module e.g. named r.analyseThis calls R
to do the actual analysis.

An interface like this would help your work tremendously, as it would make the linking much
easier. Nevertheless, I have no idea how this could be achieved, maybe via python, from which one
can call R and some convenience functions?

Cheers,

Rainer


> 
> What tools/workflow are used for this type of work? Are the current methods OK, or would some 
> integration in GRASS be better? Are any algorithms not available in other software that 
> couldshould be implemented in GRASS? Are any experts in image classification willing to mentor 
> or provide informal advice about the subject matter this summer?  (There is one volunteer to 
> mentor from the software side, it would be nice to have someone to answer questions about the 
> classification techniques.)
> 
> Thanks for any and all input! Eric
> 
> _______________________________________________ R-sig-Geo mailing list R-sig-Geo at r-project.org
>  https://stat.ethz.ch/mailman/listinfo/r-sig-geo


- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys.
(Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel :       +33 - (0)9 53 10 27 44
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email:      Rainer at krugs.de

Skype:      RMkrug
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