Sean,
my quick look at the JP2Grok driver code is that it doesn't generate the
HTJ2K / Part 15 variant of JPEG2000, at least there's nothing suggesting
that (didn't try running it). I guess that there would be a need for a
dedicated creation option in the driver for that to happen, so there
shouldn't be interoperability issues of the files it generates with
other JPEG2000 capable drivers.
I'm not sure which support of HTJ2K the ECW and MrSID SDKs have. I
believe there's such support Kakadu in recent releases, but might be
subject to extra fees (or perhaps for faster support)
There's a BSD 2 licensed implementation of HTJ2K in
https://github.com/aous72/OpenJPH . From what I see, Grok HTJ2K support
has incorporated some of that code. So for a BSD 2 compatible use in
GDAL, either a GDAL driver should be built from OpenJPH as a standalone
library, or relevant parts of OpenJPH should be "ported" to OpenJPEG.
Even
Le 03/05/2021 à 22:17, Sean Gillies via gdal-dev a écrit :
Hi Aaron, and everyone,
It seems like interoperability could be harmed if we release GDAL with
a JP2 driver that writes JPEG 2000 files that the main open source JP2
driver can't read. Would it make sense to add compatibility to
OpenJPEG before the PR gets merged? Or are we already in a state of
inoperability between JP2ECW, JP2MRSID, and JP2OpenJPEG?
On Mon, May 3, 2021 at 1:52 PM Aaron Boxer <[email protected]
<mailto:[email protected]>> wrote:
Hi Jean-Roc,
Good question - unfortunately OpenJPEG doesn't currently support
HTJ2K,
it only supports JPEG 2000 Part 1. I am sure that this will
eventually be integrated,
but it isn't there at the moment.
Cheers,
Aaron
On Mon, May 3, 2021 at 12:05 PM Jean-Roc Morreale (ml)
<[email protected] <mailto:[email protected]>> wrote:
Hi Aaron,
Is the HTJ2K's output still readable by a regular GDAL/OpenJPEG ?
Regards,
Jean-Roc Morreale
--
Sean Gillies
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