[GRASS-user] increase performance of i.ortho.photo/i.photo.rectify

[Andras Balazs]

Hi,

I am orthorectifying 3 channel aerial photographs using i.ortho.photo 
(GRASS 6.4.1, Ubuntu 10.04 64bit, dual core (each 3 GHz), 4 GB RAM).
I'm new to GRASS so no clue whether it's possible to make the 
rectification process to use the computer's resources  better. 
i.photo.rectify is using at most 30% CPU, processing of one channel 
takes about 15-20 minutes. I suppose it would be much faster if it would 
use one core running at 100%.
Is there an optimal amount of memory that should be assigned to the 
process or the more the better?

Any  suggestions would be more than welcome!

Andras