[Gdal-dev] RVB JPEG
François Prunayre
fx.prunayre at oieau.fr
Tue Jul 19 10:00:35 EDT 2005
TIFF file is pseudocolored in my case. Your exemple works fine for me.
Thanks a lot.
Francois
echo -- Reprojection en WGS84
gdalwarp -s_srs '+proj=lcc +lat_1=46.8 +lat_0=46.8 +lon_0=0 +k_0=0.99987742
+x_0=600000 +y_0=2200000 +a=6378249.2 +b=6356515
+towgs84=-168,-60,320,0,0,0,0 +pm=paris +units=m +no_defs' -t_srs
'+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs' $1 ./tmp/$2.TIF
echo -- Conversion Pseudocolor vers RGB
pct2rgb.py tmp/$2.TIF tmp/dummy.TIF
echo -- Conversion en JPEG
gdal_translate -of JPEG -co WORLDFILE=ON tmp/dummy.TIF tmp/$2.JPG
echo -- Suppression fichier temporaire
rm -f tmp/dummy.TIF
rm -f tmp/$2.TIF
echo -- Renomme fichier de georeferencement
mv tmp/$2.wld tmp/$2.jgw
-----Message d'origine-----
De : Frank Warmerdam [mailto:fwarmerdam at gmail.com]
Envoyé : mardi 19 juillet 2005 15:19
À : François Prunayre
Cc : gdal-dev at xserve.flids.com
Objet : Re: [Gdal-dev] RVB JPEG
On 7/19/05, François Prunayre <fx.prunayre at oieau.fr> wrote:
>
> Hi list,
> When using gdal_translate to convert GeoTIFF to JPEG, I get Greyscale
JPEG.
> How to get RVB JPEG instead ?
>
> gdal_translate -of JPEG -co WORLDFILE=ON tmp/F056606.TIF
> tmp/F056606.JPG
François,
Is the input TIFF file a greyscale single band image? If so, they
a greyscale output would seem appropriate.
If the input TIFF file is pseudocolored, then you would need to first
convert it to RGB format and then encode that to JPEG.
eg.
pct2rgb.py tmp/F056606.TIF tmp/very_temporary.tif gdal_translate -of JPEG
-co WORLDFILE=ON \
tmp/very_temporary.tif tmp/F056606.JPG rm tmp/very_temporary.tif
If this doesn't cover your situation, perhaps you could provide a gdalinfo
report on the input file.
Best regards,
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