Hi Joshua,
I would advise you to have a look at this segmentation framework :
http://www.orfeo-toolbox.org/CookBook/CookBooksu42.html#x64-910004.3.3
You can skip the first step if you do not want the MeanShift smoothing part.
The benefits are twofold :
- No artificial borders created by tiling,
- The output shapefile will contain radiometric attributes as well as
some shape attributes.
After this, you can perform OBIA directly within qgis, or through ogr
command-line tool (see for instance http://gdal.org/ogr2ogr.html and
http://www.gdal.org/ogr/ogr_sql.html ). You could also do it with your
current output from the Segmentation app, but the features in the
shapefile will not have any attributes (we still have to add some
functions to compute them yet)
Hope that helps,
Regards,
Julien
Le 05/05/2014 18:40, Joshua Daskin a écrit :
Hi all,
New to Monteverdi and OTB. I just finished a connected components
segmentation using the Segmentation module and the large-scale vector
output mode for large datasets. How can I filter the output (now a shp
file) using an OBIA Expression like that available in the Connected
Components module? Do I rasterize the shp? I don't see an OBIA module
that starts from such a raster--only the integrated CC segmentation
and OBIA tool that I couldn't use because my dataset is too large.
Maybe I'm missing something. Thanks for any help.
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Julien MICHEL
CNES - DCT/SI/AP - BPI 1219
18, avenue Edouard Belin
31401 Toulouse Cedex 09 - France
Tel: +33 561 282 894 - Fax: +33 561 283 109
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