On 11-02-22 11:31 AM, Frederic CLAUDEL wrote:
Hi, I've been trying to create a lossless JPEG2000 image from a signed 16-bit DEM (stored in a TIFF file), but have had no success so far with JP2KAK. My DEM has large NoData regions (value is DTED NoData : -32767) I tried different GDAL versions (1.7 1.8), and different versions of KAKADU (6.3, 6.2) I'm using gdal_translate -of JP2KAK -co QUALITY=100 <input.tif> <output.tif> The image is created with no errors, but shows strong artefacts around Nodata parts, while the large NoData areas are transformed to random 16bit garbage.
Frederic, I would encourage you to file a ticket and I'll investigate. I believe there is a bug in the JP2KAK driver. I started some related improvements a couple months ago but let them fall by the wayside since no one seemed to be running into the problems. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
