[GRASS-user] unsupervised image classification

[Markus Neteler]

On Tue, Mar 27, 2012 at 11:03 PM, Milton Cezar Ribeiro
<miltinho.astronauta at gmail.com> wrote:
> Dear all,
>
> I need to classify a Landsat image on GRASS but I would like to
> automatically define the classes, not to define a priori.
>
> Is there a way of I set the input bands on a processing, and the
> algorithm find the "signatures" within the images and define the
> number of classes?

Yes, please check
http://grass.osgeo.org/wiki/Image_classification#Unsupervised_classification

Markus