[GRASS-user] i.maxlik problem
giucillis at gmail.com
Fri Sep 21 03:10:25 PDT 2018
I solved with the synthetic channels generation.
Il giorno mer 19 set 2018 alle ore 22:39 Markus Neteler <neteler at osgeo.org>
> On Wed, Sep 19, 2018 at 12:43 PM Giuseppe Cillis <giucillis at gmail.com>
> > Thanks for the message,
> > but when I try to run i.cluster with just one raster, the module doesn't
> work because: " subgroup need two images" .
> ... this is because it requires two maps or more as input. Do you have
> greyscale photos? If yes, i.e. you want to classify a single-band
> image, then you can use other options:
> - generate synthetic channels (e.g., with r.texture) to be
> additionally fed to i.cluster/i.maxlik
> - use segmentation, e.g. with i.segment
> However, probably you have R, G, B available? Then, as per email by
> Markus Metz, you need to first patch channel-wise the two orthophotos
> into 3 mosaiks, then feed that to i.cluster/i.maxlik.
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