[gdal-dev] Lossless JPEG2000 compression with NITF Format and OpenJPEG

[Even Rouault]

Hi,

yes, in the 3.3 branch and earlier, there was no tunable to ask for 
lossless JPEG2000 compression

If you use GDAL master, you can now use the 
PROFILE=NPJE_NUMERICALLY_LOSSLESS option for that

Even

Le 30/08/2021 à 17:16, Chastain, Raymond Lee (MU-Student) a écrit :
> We're trying to create NITFs with lossless compression using the 
> OpenJPEG driver for JPEG2000 compression.
>
> We've set the "QUALITY=100" creation option but are still noticing 
> that repeated conversions generate different perceptual image hashes.
>
> The OpenJPEG driver mentions "REVERSIBLE=YES" but that doesn't seem to 
> be a valid creation option for the NITF driver.
>
> Sample gdal_translate command:
> "gdal_translate -of NITF -co IC=C8 -co BLOCKXSIZE=256 -co 
> BLOCKYSIZE=256 -co SDE_TRE=YES -co QUALITY=100 sample.tif reversible.nitf"
>
> Am I going about this the right way?
>
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