[gdal-dev] Converting to J2K

[Smart, Gary]

I only have the JPEG2000 part 1 blah blah available.  Nevertheless, this
is the one I am trying to use.  I guess it's yet another thing that
doesn't install properly on SUSE10!!

I'll try and get everything re-installed on my machine - I also seem to
have problems with PROJ4 stuff also.  I installed everything from the
FWTools package.  I don't suppose anyone knows a reliable installation
source for GDAL on SUSE10?

 

________________________________

From: Greg Coats [mailto:gregcoats at mac.com] 
Sent: 18 August 2009 17:36
To: Smart, Gary
Cc: gdal-dev at lists.osgeo.org
Subject: Re: [gdal-dev] Converting to J2K

 

According to http://www.gdal.org/formats_list.html , GDAL supports four
flavors of JPEG2000, four different implementations of wavelet
compression, based on JasPer, Kakadu, ECW, and MrSID. Two of these four
are available to me

gdal_translate | grep 2000

  JP2KAK: JPEG-2000 (based on Kakadu)

  JPEG2000: JPEG-2000 part 1 (ISO/IEC 15444-1)

Which of these four are available to you?

 

When creating and writing a JPEG2000 file, use -of to specify which of
the available flavors you want GDAL to use.

/usr/bin/time gdal_translate -of JPEG2000 18stj940125.tif
18stj940125_gdalV162_of_JPEG200.jp2

Input file size is 5000, 5000

0...10...20...30...40...50...60...70...80...90...100 - done.

       24.27 real        20.91 user         2.47 sys

/usr/bin/time gdal_translate -of JP2KAK   18stj940125.tif
18stj940125_gdalV162_of_JP2KAK.jp2

Input file size is 5000, 5000

0...10...20...30...40...50...60...70...80...90...100 - done.

       15.75 real        15.06 user         0.30 sys

Greg

 

 

On Aug 18, 2009, at 11:14 AM, Smart, Gary wrote:





I have tried just about all the standard J2K extensions - none appear to
work.

 

This is the output from...

 

gdal_translate -of JPEG2000 image.ntf image.jp2

 

Input file size is 4008, 2672

0...10...20...30...40...50...60...70...80...90...100 - done.

ERROR 4: `image.jp2' not recognised as a supported file format.

 

The 0..10... bit happens absurdly quickly (as if it does nothing useful)

 

The ERROR is (I think) perhaps generated by an automatic gdalinfo
directly after the translate.

Certainly, a gdalinfo on the created file returns an almost identical
error.

 

I can convert the ntf file into a geotiff OK.  But then, if I try and
convert the geotiff to jp2 - it fails - giving exactly the same
symptoms.  Is there some sort of JPEG2000 library I have to specifically
load or something?

 

________________________________

From: gdal-dev-bounces at lists.osgeo.org
[mailto:gdal-dev-bounces at lists.osgeo.org] On Behalf Of Greg Coats
Sent: 18 August 2009 15:44
To: Smart, Gary
Cc: gdal-dev at lists.osgeo.org
Subject: Re: [gdal-dev] Converting to J2K

 

$ gdal_translate --version

GDAL 1.6.2, released 2009/07/31

$ gdal_translate -of JPEG2000 18stj940125.tif 18stj940125.jp2

Input file size is 5000, 5000

0...10...20...30...40...50...60...70...80...90...100 - done.

 

FYI The convention for JPEG2000 image files is to use the extension
.jp2.

Greg

 

On Aug 18, 2009, at 4:13 AM, Smart, Gary wrote:






I am trying 'gdal_translate  -of JPEG2000  thingy.ntf  thingy.j2k' but
GDAL complains that it doesn't understand the format thingy.j2k

I think its getting the arguments confused.  What am I doing wrong?

 

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