[Dcmlib] Re: Troubles again on jpeg2000: kakadu

[Mathieu Malaterre]

BTW kakadu support a notion of raw format (vs bmp, pnm...), Be carefull 
this is *big endian* raw whatever the plateform you are on.

Mathieu
Ps: dd conv=swab is your friend

Mathieu Malaterre wrote:
> Since I don't have enough hours in the day...
> 
> For whoever is interesed in decompressing DICOM image encoded with 
> *irreversible* transfer function, you have to unappkly this patch:
> 
> http://www.creatis.insa-lyon.fr/viewcvs/viewcvs.cgi/gdcm/src/gdcmjasper/src/libjasper/jpc/jpc_fix.h?rev=1.3&sortby=date&view=log 
> 
> 
> This patch will allow one to see properly (well almost) images like 
> CT_Phillips_JPEG2K_Decompr_Problem.dcm
> 
> I cannot get enough attention on jasper ML, even people from dcmtk are 
> banging there head on this problem. jasper simply does not handle 16bits 
> image in the irrersible case (well at least this one).
> 
> A much better library look like kakadu. I would suggest for real serious 
> people to use this library instead. Here is how:
> 
> Uncomment the #if 0 in gdcmJpeg2000.cxx so that when reading a DICOM 
> image it will create a temp file containing only the jpeg2000 stream.
> Then use kakadu to extract the image:
> 
> $ kdu_expand /tmp/jpeg2000.jpc /tmp/output.bmp
> 
> I know this is a pain, but I cannot garantee anything otherwise.
> 
> Mathieu
> Ps: CT_Phillips_JPEG2K_Decompr_Problem.dcm contains indeed a jpeg2000 
> stream compressed using kakadu 2.2 !
> 
> Mathieu Malaterre wrote:
> 
>> Jean-Pierre Roux wrote:
>>
>>> Hi, Mathieu
>>>
>>> Remember the jpeg2000 images with 2 hypointense shapes  (an a strange 
>>> rectangle on the top of the image  -but MD said it was a CR 
>>> artifiact, no a decompression pb)?
>>> You made some modif in JASPER, and it was OK (no more shapes, still 
>>> the rectangle)
>>>
>>> The pb is here again (even with 'old style' TagKeys)
>>> JP
>>
>>
>>
>> http://public.kitware.com/GDCM/Testing/Dashboard/20050711-0100-Nightly/Update.html 
>>
>> ->
>> http://www.creatis.insa-lyon.fr/viewcvs/viewcvs.cgi/gdcm/Testing/CMakeLists.txt.diff?r1=1.112&r2=1.113 
>>
>>
>> Doing my best...
>> Mathieu
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