[gdal-dev] Default progression order in JP2OpenJPEG driver

[Norman Barker]

Even, Jukka,

the NPJE end EPJE specifications are both good for understanding
progression order in JP2. It all depends on what you are trying to do, so a
default is just that, something that can be changed.

A JP2 file with PLT markers (packet markers) in my experience removes most
of the overhead of accessing packets as the header decoding doesn't have to
be performed.

Norman

On Thu, Mar 5, 2015 at 8:46 AM, Even Rouault <even.rouault at spatialys.com>
wrote:

> Le jeudi 05 mars 2015 16:25:53, Jukka Rahkonen a écrit :
> > Hi,
> >
> > It defaults to "LRCP". Is it really a good selection? JP2KAK defaults to
> > "PRCL" and JP2ECW to "RPCL" which both feels better choices than LRCP.
> But
> > perhaps it has been considered to be good for OpenJPEG because it must
> > practically be used with tiled output which may guarantee fast locational
> > access even with LRCP.
>
> Jukka,
>
> Do you have a reference for which progression order is best for which
> purpose
> ?
> The default of the OpenJPEG driver is the default os the openjpeg lib
> itself.
>
> Even
>
> >
> > -Jukka Rahkonen-
> >
> > _______________________________________________
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> > gdal-dev at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/gdal-dev
>
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