[Dcmlib] My first JPEG LL / J2k images

[Mathieu Malaterre]

Jean-Pierre Roux wrote:
> Mathieu Malaterre wrote:
> 
>> go here:
>> http://www.creatis.insa-lyon.fr/~malaterre/gdcm/jpeg/
>>
>> Ok I don't understand why vtkgdcmViewer is only showing up the first 
>> frame only...
>>  
>>
> 
> --> Easy : only the first frame is 'non zero'
> try :
> ReWrite filein=yourImageJ2K.dcm fileout=uncompressedImage.dcm


Ok I just confirmed that jpeg2000 is broken for multiframes in GDCM. 
Unfortunately AFAIK openjpeg needs to know the length of the jpeg 
stream. So far we assumed there was only one j2k stream so appending all 
fragment would always work. But for multiple images, when we append all 
images, openjpeg stop decompressing when finding the first j2k end of 
stream (and discard the rest). That's whay we could only load the first 
frame.

I have ask the openjpeg team for a solution,
Mathieu
Ps: I can provide a code that work either for multiframes or single 
frame (need recompilation).