[GRASS-user] i.segment vs. i.segment.gsoc
mlennert at club.worldonline.be
Thu Jun 11 06:30:34 PDT 2020
On 11/06/20 13:36, mbrauchler at posteo.de wrote:
> Thank you for the explanation! I assumed gsoc version is build upon
> Is there any way to include the shape parameters in i.segment? I am very
> fond of the gsoc version as it helps surpress segments growing to very
> complex geometries (shadows through the forest patches for example).
There was some reasons why the shape parameters were not integrated in
i.segment, but I can't remember why. Some code is actually there, but
currently it is not used.
MarkusM, do you remember ? And how complicated would it be to integrate
> Kind regards,
> On Jun 11, 2020 12:52 PM, Moritz Lennert <mlennert at club.worldonline.be>
> i.segment.gsoc is the original version developed during GSoC.
> i.segment is ann optimized version that was originally based on the
> GSoC work, but has known different developments since, including in
> the way the threshold parameter is applied.
> I would recommend using i.segment.
> Am 10. Juni 2020 13:13:33 MESZ schrieb mbrauchler at posteo.de:
> >Hello list,
> >I am working on segmentation of aerial imagery in forest areas and
> >used both modules (i.segment and i.segment.gsoc) for some
> >When running i.segment and i.segment.gsoc with radioweight = 1 on the
> >same dataset with a threshold of 0.3, I assumed the output should be
> >similar, but it isn't.
> >In the manual of i.segment.gsoc it is stated that the threshold
> will be
> >multiplied by the number of rasters in the image group, so I tried a
> >threshold of 0.1 in i.segment.gsoc vs a threshold of 0.3 in i.segment
> >I have 3 rasters in my image group. Although the results are now more
> >similar, they still vary a lot.
> >I have attached the images to show the derived segments from
> >0.3 and i.segment.gsoc 0.1. Can someone help me to understand why
> >is happening? I would appreciate it.
> >Kind regards,
> >Melanie Brauchler
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