[Insight-developers] DICOM & JPEG update : Tcon topic

[Luis Ibanez]

Sure, let's talk about this next Friday.


     Luis


--------------------------------------
Lorensen, William E (Research) wrote:

> This sounds great except that Jim and I are out of town this week. Can we do
> it next Friday?
> 
> Bill
> 
> -----Original Message-----
> From: Luis Ibanez [mailto:luis.ibanez at kitware.com]
> Sent: Wednesday, October 13, 2004 10:53 AM
> To: Insight Developers List
> Cc: Mathieu Malaterre
> Subject: [Insight-developers] DICOM & JPEG update : Tcon topic
> 
> 
> 
> Here is a suggested topic for friday's tcon.
> 
> Among the limitation of the current DICOM classes
> in ITK we have the following:
> 
>    1) Do not manage JPEG compressed images.
>    2) Do not provide writing.
> 
> In order to deal with (2), Mathieu Malaterre
> contributed ImageIO classes for interfacing
> with gdcm, an open source library developed
> by the Creatis team at INSA-Lyon, France.
> 
> http://www.creatis.insa-lyon.fr/Public/Gdcm/
> 
> It will be convenient to add gdcm to the
> Utilities directory and distribute it along
> with ITK. The Creatis team has already updated
> the license of gdcm in order to match the style
> of the ITK license.
> 
> http://www.creatis.insa-lyon.fr/Public/Gdcm/License.html
> 
> -------------------------------------------------
> 
> Here are some of the issues involved:
> 
> The current source code of ITK takes 124 Mbytes.
> 
> The source code of gdcm takes 7 Mbytes.
> 
> 4 Mbytes out of those 7 are for the JPEG libraries
> that gdcm distributes in the same way that we
> distribute jpeg, png, zlib in ITK's Utilities
> subdirectory.
> 
> The current jpeg library in ITK takes 1.3Mbytes,
> but has a number of limitations regarding the
> functionalities of the JPEG standard.
> 
> 
> 
> The proposal is therfore to do the following:
> 
> 1) replace the current jpeg libraries in ITK
>     with the jpeg libraries used in gdcm.
> 
>     That is:  "ijg"   http://www.ijg.org/
> 
> 
> 2) Patch this library with a couple of known
>     bug fixes.
> 
> 
> 3) Add gdcm to Insight/Utilities by removing
>     its own distribution of jpeg, so there will
>     be no duplication of jpeg code.
> 
> 
> 
> This process will require a number of adjustments,
> but can probably be done in time for ITK release 2.0
> in February 2005.
> 
> 
> 
> 
>     Luis
> 
> 
> 
> 
> 
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