[GRASS-user] problems with colors resulting of an image fusion

[Moritz Lennert]

Hi everyone,

I have some troubles with image fusion through IHS transformation of a 
Landsat image. Using d.rgb to display the resulting r,g,b channels gives 
completely different colors than the original d.rgb on the 30,20,10 
Landsat channels.

On this image:

http://geog-pc40.ulb.ac.be/grass/landsat_fusion.png

You see the original d.rgb on the upper left, the panchromatic channel 
on the lower left and the result of the IHS transformation on the lower 
right.

All channels have a grey.eq color table.

The image

http://geog-pc40.ulb.ac.be/grass/landsat_fusion2.png

shows the same, but zoomed-in, showing that the fusion seems to have 
worked (i.e. the resulting image has higher resolution).

Does anybody have an idea of might be the problem ?

Moritz