[Gdal-dev] NITF JPEG Compression

[Frank Warmerdam]

Alan Stewart wrote:
> Frank Warmerdam <warmerdam at pobox.com> wrote:
>> I have committed preliminary support to the GDAL NITF driver for JPEG
>> (C3) compressed images.  This includes "single blocked" (one big tile) 
>> and
>> multi-blocked images.  It only works for 8bit, not 12/16 bit images.  It
>> does not (as far as I understand it) support lossly compressed jpeg.  The
>> support is read-only, not for export.
>>
>> I am interested in reports of problems with the support.
>>   
> I've downloaded and build gdal-1.3.2 on Windows XP. All the JPEG images 
> seem to be failing in the sample file set posted at 
> <http://www.gwg.nga.mil/ntb/baseline/software/samplefile.html>. For 
> example, in the NITF 2.0 section, U_1105A, U_1025A, U_1033A and U_1036A 
> fail.
> 
> Should I be using the external JPEG library support I see in nmake.opt?

Alan,

The jpeg in nitf support was implemented after the 1.3.2 release.  You can
grab a nightly CVS snapshot to test it out.  It should work with either
the internal libjpeg, or an external one.  No need to alter your configuration
for this.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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