Hamish wrote: > > > Can i remove unrectified former 3 seperate rgb files? > > Yes, after r.composite you can remove them. > > but note that you will lose information. the 3 bands will > probably be stored with 256 bit precision,
That's 256 levels = 8 bits per component, 24 bits total. > r.composite will reduce fidelity down to probably 32 bit. That's 32 levels = 5 bits per component, 15 bits total. r.composite can generate ouput with 256 levels (8 bits per component, 24 bits total), but the resulting colour tables are large, which creates a significant performance issue for any operation which needs to perform colour lookup (e.g. d.rast). > If you are doing any numerical analysis on satellite images, etc, > this matters a lot and it's best to work with the raw bands, d.rgb, > etc. If you are just using it for visual use maybe it doesn't > matter. Indeed. -- Glynn Clements <[email protected]> _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
