[GRASS-user] Performing a Maximum Likelihood Supervised classification with a single band

[Veronica Andreo]

Ciao Nikos :)

Yes, you are right! I missed that one!

There's ISODATA unsupervised classification algorithm (not in GRASS that I
know) and it allows for just one band input.

Cheers,
Vero

2015-10-08 16:52 GMT-03:00 Nikos Alexandris <nik at nikosalexandris.net>:

> * Veronica Andreo:
>
> > Ciao Umberto,
> >
> > AFAIK, classification is multivariate on its statistical basis, so that's
> > why it will only take a group as input. If you only have one band, you
> may
> > want to extract some information from it, for example by using r.texture
> > module [1]. With those resulting new bands and the original one you can
> > create then a group and perform the classification you prefer.
> > [1] https://grass.osgeo.org/grass71/manuals/r.texture.html
>
>
> Ciao Vero.  There is, for example, the ISODATA algorithm out there.
> Just not in GRASS (yet?).
>
> Nikos
>
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