[gdal-dev] Converting to J2K

[Greg Coats]

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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