Artifacts in Image Using GDAL JP2KAK plugin for lossless 16 bit

[swalter75]

When converting Int16 data to JP2KAK with the -co "QUALITY=100" option, strange artifacts are created in the nodata values and in some cases also in the image data (not in the example below). Using the conversion without the lossless option everything works as expected.

For example, the problem can be inspected with this xample data (Mars elevation):

​http://www.geoinf.fu-berlin.de/h0533_0000.dt4.53.tif

The following command gives strange results:

gdal_translate -ot Int16 -of JP2KAK -co "QUALITY=100" h0533_0000.dt4.53.tif h0533_0000.dt4.53_qual100.jp2

Here is a link to the resulting problematic image:

​http://www.geoinf.fu-berlin.de/h0533_0000.dt4.53_qual100.jp2

This command gives expected results:

gdal_translate -ot Int16 -of JP2KAK h0533_0000.dt4.53.tif h0533_0000.dt4.53.jp2

The problem has already been described in this thread, but never been addresses (as far as I know):

​http://lists.osgeo.org/pipermail/gdal-dev/2011-February/027900.html