Hi, With my GDAL 3.1.4 from OSGeo4W converting a single band Float32 DEM file into JPEG compressed TIFF and into plain JPEG succeeded with these commands:
gdal_translate L2431.tif -co COMPRESS=JPEG -ot uint16 -co NBITS=12 out.tif gdal_translate L2431.tif -of JPEG -ot uint16 -co NBITS=12 out.jpg I have never played with 12 bit JPEGs before. The documentation was not very clear to me and I am not sure if it is essential to first define the data type into uint16 and then limit the number of NBITS into 12. But without using -ot uint16 I got messages like Warning 6: Only NBITS=16 is supported for data type Float32 Warning 1: NBITS=32 is invalid for data type UInt16. Using NBITS=16 ERROR 1: JPEGSetupEncode:BitsPerSample 16 not allowed for JPEG Warning 6: driver JPEG does not support creation option NBITS 0Warning 6: JPEG driver doesn't support data type Float32. Only eight and twelve bit bands supported (Mk1 libjpeg). I wonder if there is any way for the user to find out if their GDAL is compiled with 12 bit JPEG support. -Jukka Rahkonen- GDAL - Dev mailing list wrote > Hello and thank you in advance, > > > > Im trying to generate png and jpeg 12 bits images from a GTiff single band > file with no success. I know is there a way to generate 12 bits images in > the GDAL command line as I have seen in some examples (gdal_translate > mandril_rgb.tif -co COMPRESS=JPEG -co PHOTOMETRIC=YCBCR -co NBITS=12 > out.tif) but trying it with my singlebands tif files it only generates a > black image (with PHOTOMETRIC set to MINISBLACK). Is it only a method for > rgb files? > > Searching in the python API I only can find gdalconst for 16, 32 and 64 > bits > formats. Is there a way to do the same with 12 bits files? > > > > Kind regards > > > > > <http://www.solute.es/> > > > Jesús Maria Morán Rosado > Project Engineer > > Av. Cerro del Águila, 3, 28703 S.S. de los Reyes, Madrid > > CONFIDENTIALITY: This e-mail and any attachments are confidential and may > be > privileged. If you are not a named recipient, please notify the sender > immediately and do not disclose the contents to another person, use it for > any purpose or store or copy the information in any medium. > > > > > _______________________________________________ > gdal-dev mailing list > gdal-dev@.osgeo > https://lists.osgeo.org/mailman/listinfo/gdal-dev > > > image001.gif (2K) > <http://osgeo-org.1560.x6.nabble.com/attachment/5455390/0/image001.gif> -- Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
