[Insight-developers] JPEG lib: 8/12/16 bits and lossless

[Miller, James V (Research)]

Mathieu, 

I don't know for certain whether it worked before because Charlene just 
did an update yesterday and hadn't updated in several months.  I think 
ITK used to read the file correctly up to a flip (she updated ITK
yesterday to get a fix for a flip in her TIFF images).

I'll forward the image she sent to me.

Jim


-----Original Message-----
From: Mathieu Malaterre [mailto:mathieu.malaterre at kitware.com]
Sent: Thursday, November 04, 2004 5:09 PM
To: Miller, James V (Research)
Cc: insight-developers at itk.org
Subject: Re: [Insight-developers] JPEG lib: 8/12/16 bits and lossless


Jim,

  - Did it work in previous ITK version ?
  - Is it using tif_jpeg.c or tif_ojpeg.c ?

  - Maybe the easier solution would be to send me the tiff image, if 
possible ?

Thanks,
Mathieu
Ps: what about image magick / gimp ?

Miller, James V (Research) wrote:
> Mathieu,
> 
> Charlene at RPI is having problems reading a TIFF image that uses a JPEG
> encoding. I ran on one of her images and the TIFF code is crashing in the
> itkjpeg8/jdapistd.c (jpeg_read_scanlines).
> 
> Since you just introduced the new jpeg libraries, I wonder whether this
> problem can be related to the new jpeg changes.  To be honest, I don't
> know whether ITK's TIFF code could read a jpeg compressed image before
> or not.
> 
> Jim
> 
> 
> 
> 
> -----Original Message-----
> From: Mathieu Malaterre [mailto:mathieu.malaterre at kitware.com]
> Sent: Wednesday, October 27, 2004 4:51 PM
> To: Mathieu Malaterre
> Cc: insight-developers at itk.org
> Subject: Re: [Insight-developers] JPEG lib: 8/12/16 bits and lossless
> 
> 
> Okay,
> 
> 	I have been refactoring the code to be as simple as possible. It 
> compiles fine now on:
> 
> - Linux / gcc
> - Win32 / VC6
> - HP-UX
> - SunOS
> 
> 	I'll start commiting the code sometime this week.
> 
> Mathieu
> 
> Mathieu Malaterre wrote:
> 
>>Hello,
>>
>>    As discussed in last week TCON, I will be progressively integrating 
>>GDCM(*) into ITK. GDCM is a dicom library that support a great variety 
>>of images (jpeg lossy/ lossless, RLE compression, YBR image, using the 
>>full DICOM dictionnary... ). For more information please go to:
>>
>>    http://www.creatis.insa-lyon.fr/Public/Gdcm
>>
>>    The first step, is to update the current jpeg lib (which
>>only support lossy 8bits) shipped with ITK to support:
>>
>>- lossless jpeg (which is needed to fully support DICOM images).
>>
>>- To support 8bits, 12bits and 16bits (16bits is only for lossless image).
>>
>>    There will be then three jpeg libraries, one for 8bits, one for 
>>12bits and one for 16bits, with the proper name mangling (prepending 
>>symbols with itk_jpeg8 for the 8bits one ...)
>>
>>    As a side effect we will loose the ability to use the system jpeg 
>>lib. Let me know ASAP if this could affect in any way your project, so 
>>we can work out a solution.
>>
>>Mathieu
>>(*)GDCM stands for Grass roots DiCoM
>>
>>
>>
>>_______________________________________________
>>Insight-developers mailing list
>>Insight-developers at itk.org
>>http://www.itk.org/mailman/listinfo/insight-developers
>>
> 
> 
> 
> 
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