Re: [GRASS-user] Making images colours uniform
On 26/03/13 17:59, Paolo Cavallini wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi all. Is there a command in GRASS to merge adjacent images so that their colour tabel is more uniform? I remember something, but cannot find it back. I'm not sure if I completely understand what you are looking for, but does r.colors raster= do what you want ? Moritz ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Making images colours uniform
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Il 27/03/2013 11:32, Moritz Lennert ha scritto: I'm not sure if I completely understand what you are looking for, but does r.colors raster= do what you want ? Sorry I was unclear. I have a series of ortophotos, each of them with a different colour blend; when mosaicked, the result is ugly. My objective is to make them look more similar. Thanks. - -- Paolo Cavallini - Faunalia www.faunalia.eu Full contact details at www.faunalia.eu/pc Nuovi corsi QGIS e PostGIS: http://www.faunalia.it/calendario -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlFSy1MACgkQ/NedwLUzIr4ZIwCgj8R3/V0cejYeXu3lYxh+THnB XLUAnRMR80cB3Bj5LSSh52BDiBph3dll =2KOs -END PGP SIGNATURE- ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Making images colours uniform
I never used it but I believe there is an addon I.hist.match for histogram matching On Mar 27, 2013 7:35 AM, Paolo Cavallini cavall...@faunalia.it wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Il 27/03/2013 11:32, Moritz Lennert ha scritto: I'm not sure if I completely understand what you are looking for, but does r.colors raster= do what you want ? Sorry I was unclear. I have a series of ortophotos, each of them with a different colour blend; when mosaicked, the result is ugly. My objective is to make them look more similar. Thanks. - -- Paolo Cavallini - Faunalia www.faunalia.eu Full contact details at www.faunalia.eu/pc Nuovi corsi QGIS e PostGIS: http://www.faunalia.it/calendario -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlFSy1MACgkQ/NedwLUzIr4ZIwCgj8R3/V0cejYeXu3lYxh+THnB XLUAnRMR80cB3Bj5LSSh52BDiBph3dll =2KOs -END PGP SIGNATURE- ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Making images colours uniform
Daniel Victoria wrote: I never used it but I believe there is an addon I.hist.match for histogram matching Yes, it's i.histo.match for grass70: https://svn.geotools.org/grass/grass- addons/grass7/imagery/i.histo.match/i.histo.match.html A related thread: http://lists.osgeo.org/pipermail/grass-dev/2013-February/062157.html. It works, with integer values and doesn't like the . character in the name of the input raster maps (currently?). Note, however, histogram matching wont work always, i.e. wont bring always eye-pleasant results. Normalising observations (read pixel values) of different acquisitions (to a common reference) from the same sensor (as I understand in this case), depends on many things (the acquisition geometry itself, the illumination and atmospheric conditions at the time of the acquisition, and other parameters). It is however, in a sense, required if one needs to not only visually interpret a mosaic, but also in case of attempting to cluster/segment/classify an image(-mosaic). [rest deleted] Best, Nikos signature.asc Description: This is a digitally signed message part. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Making images colours uniform
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi all. Is there a command in GRASS to merge adjacent images so that their colour tabel is more uniform? I remember something, but cannot find it back. All the best, and thanks. - -- Paolo Cavallini - Faunalia www.faunalia.eu Full contact details at www.faunalia.eu/pc Nuovi corsi QGIS e PostGIS: http://www.faunalia.it/calendario -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAlFR0+4ACgkQ/NedwLUzIr7d7QCfR+an86eIIH2Ggm51TkgC2CRf 7GoAoIWviiyksi0lFYZqjZqspvf+js/4 =XWWh -END PGP SIGNATURE- ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
