Conversion from GeoJP2 to GeoTIF with JP2KAK Kakadu exceptionally slow

[gregcoats@…]

Conversion from GeoJP2 to GeoTIF with JP2KAK Kakadu based JP2 driver exceptionally slow

A series of tests show that GDAL 1.3.2.0, released 2006/05/02 is exceptionally slow reading in a GeoJP2 and then writing out a GeoTIF, but only when using the JP2KAK Kakadu based driver.

Doing a conversion from GeoJP2 to GeoTIF with Kakadu directly using kdu_expand -i in.jp2 -o out.tif is 8 times faster than calling upon the GDAL JP2KAK Kakadu driver to do the same conversion.

Doing a conversion from GeoJP2 to GeoTIF using the GDAL JPEG2000 JasPer driver, which does use not hardware acceleration, is inexplicably twice as fast as asking the GDAL JP2KAK Kakadu driver, which does use AltiVec and SSE hardware acceleration, to do the same conversion. This is illogical.

[warmerdam]

Greg,

Could you test again with the trunk version of GDAL (or a daily snapshot of trunk).

Some substantial rewriting of the JP2KAK driver was done in an effort to optimize several cases.

[Coatman]

Frank, I have not previous worked with the trunk version or daily snapshot of the trunk. Please advise where I go to download that. Thanks. Greg

[mloskot]

Greg,

Please, check this location: DownloadSource, where you can find source packages with GDAL releases, nightly snapshots and details how to checkout GDAL sources directly from SVN repository.

-- Mateusz

[Even Rouault]

Probably no longer valid since that time