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

[Miller, James V (Research)]

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
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> 



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