Hi Josep, The images probably need a 'Histogram Stretch' using 'r.colors' use the 'grey' (color) and tick Histogram Stretch' but make sure you set 'g.region' to the full image first otherwise it wont work.
Paul Shapley On 10 December 2015 at 11:03, Josep Sitjar <jo...@sigte.udg.edu> wrote: > Dear all, > I'm working with r.composite to create a natural color band combination > using Landsat 8 image. The result is a very dark image, so I would like to > know if there's any way to improve it. I'm using GRASS 6.X and also GRASS > 7. > > Thanks in advance, > > -- > *Josep Sitjar Suñer* > Tècnic SIG / Servei de Sistemes d'Informació Geogràfica i Teledetecció > - > Universitat de Girona > *SIGTE* > - > Pl. Ferrater Mora 1 > 17071 Girona > Tel +34 972 418 039 (7026 intern) > jo...@sigte.udg.edu > > http://www.sigte.udg.edu > Twitter http://twitter.com/SIGTE_UDG > > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > -- *Paul J. Shapley *MSc CGeog (GIS) FRGS
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