[GRASS-user] Signature file structure

[Pedro Roma]

Ok as far as I can see it's
Category ID (class)
Mean vector (each value is the average for the category in each band)

Var(b1;b1)
Cov(b1,b2)  Var(b2;b2)
Cov(b1,b3)  Cov(b2,b3)  Var(v3,v3)

it's this?
By the way, is in any place the inversion of the covariance matrix?

Thanks
Pedro

On Wed, Jul 28, 2010 at 8:30 PM, Nikos Alexandris <
nikos.alexandris at felis.uni-freiburg.de> wrote:

> On Wednesday 28 of July 2010 21:22:08 Nikos Alexandris wrote:
> > Perhaps just reading the created signature (text) files and identifying
> > the  mean's and variance/covariance matrices is enough.
>
> Didn't have a look yet but the "Mean's ... matrices" is I guess wrong.  The
> signature file probably contains mean values (one mean value for each
> training
> class) and the var./covar. matrices (one matrix for each training class).
>
> Nikos
>
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