[GRASS-user] Inverse PCA in GRASS

[Dylan Beaudette]

On Thursday 06 December 2007 08:05:28 am Venkatesh Raghavan wrote:
> Dear All,
>
> Commonly described method for image fusion in
> in several publications involves inverse PCA transform
> to get the new R,G,B bands of multispectral image from
> the principle components.
>
> Does any of you know a script or an algorithm to implement
> inverse PCA in GRASS?
>


Hi,

I have never heard of inverse PCA, do you mean visualizing the components in 
some kind of color composite?

If that is what you want try running i.pca with the option to re-scale 
components to 0-255, generate a greyscale color map for each component, and 
then visualize with d.rgb or r.composite.

Cheers,

Dylan