[Insight-developers] Streaming with ImageWriter and IORegion

Mon Dec 29 12:41:06 EST 2008

Great.

BTW, I got the dates wrong.
The correct dates are Jan 5th to 9th.
(but that's still, next week)   :-)

 http://wiki.na-mic.org/Wiki/index.php/AHM_2009

I'll be there from Monday to Friday morning.

---

Good idea to gather the requirements and challenges before the meeting.
For that purpose, we just created a Proposal Wiki page, at:

http://www.itk.org/Wiki/Proposals:Adding_Streaming_Support_in_ITK_Image_Writing

We can copy here most of what Brad has already chartered.

Of course, more suggestions are welcome.

    Luis

-----------------------------------------------------------------------------------------------------------------
On Mon, Dec 29, 2008 at 12:28 PM, Stephen Aylward <
Stephen.Aylward at kitware.com> wrote:

> Great idea!
>
> Tell me where and when and I'll be there.
>
> Might be interesting to start with a discussion on how the current process
> is failing / not meeting needs.
>
> s
>
>
> On Mon, Dec 29, 2008 at 12:24 PM, Luis Ibanez <luis.ibanez at kitware.com>wrote:
>
>>
>> Stephen,
>>
>> Should we address this during the upcoming NAMIC developers meeting  ?
>> (Jan 4th-8th) is not that far.
>>
>> The implementation of Streaming for Reading was done in one of these
>> meetings. It was a lot easier by the developers of several ImageIO
>> classes in the room.
>>
>> Heavy enforcers of backward-compatibility may also be attending this
>> meeting... so all fronts will be cared for.  :-)
>>
>>
>>   My 2 cents suggestion,
>>
>>
>>      Luis
>>
>>
>> ------------------------
>> Stephen Aylward wrote:
>>
>>> Hi,
>>>
>>> We use metaIO streaming reading and writing fairly heavily in several
>>> apps.   Please let me know if you find problems or if you need any help.
>>> Several people have been adding features in the past year or so, and I fear
>>> a bit of feature creap and bad coding might have arisen.   Might be time for
>>> some house cleaning.
>>>
>>> My recent changes were to fix memory leaks, to improve reporting
>>> regarding when streaming is or is not supported, and to fix a bug when
>>> attempting to read a stream equal to the size of the entire image.
>>>
>>> Also, note that changes to MetaIO cannot be committed directly to
>>> Insight.   It is a locked directory in the CVS repository because MetaIO in
>>> ITK and VTK share the same code which exists in a public svn repository:
>>> https://www.kitware.com:8443/svn/KWPublic/trunk/MetaIO
>>>
>>> Changes made to the svn repository are automatically (and nearly
>>> instantly) distributed to ITK and VTK.   It is a wonderfully unique
>>> opportunity to annoy a huge number of open-source developers in a wide range
>>> of fields with a single check-in :)
>>>
>>> Stephen
>>>
>>> On Mon, Dec 29, 2008 at 11:43 AM, Bradley Lowekamp <
>>> blowekamp at mail.nih.gov <mailto:blowekamp at mail.nih.gov>> wrote:
>>>
>>>    Hello,
>>>
>>>    I submitted MetaImageIO  as bug #8333. The streaming pipeline is
>>>    working just fine; MetaIO is just failing to read it under these
>>>    conditions. I am going to commit the compare for
>>>    itkMetaImageStreamingWriterIOTest2 to verify that is just not a
>>>    weird mac issue. Then I will try to track it down if it's a cross
>>>    platform issue. I am also just discovering some problems with mhd vs
>>>    mha files too. I'm going to have to look at the interaction of a few
>>>    things here... Not sure what's going on...
>>>    These problems are orthogonal to the posted enhancement
>>>    though. Please let me know what else you need for this enhancement.
>>>
>>>    Brad
>>>
>>>    On Dec 27, 2008, at 4:51 PM, Luis Ibanez wrote:
>>>
>>>     Bradley Lowekamp wrote:
>>>>
>>>>        Thirdly, before I left work for the holiday, I had an idea
>>>>>    what the  cause of itkMetaImageStreamingWriterIOTest2 not
>>>>>    producing the correct  results. I think that MetaImageIO,
>>>>>    streaming functionality does not  work with non-square voxels.
>>>>>    But I need to look into this further to  be certain. I was
>>>>>    planning on doing this on Monday.
>>>>>
>>>>
>>>>     Brad
>>>>>
>>>>
>>>>    -------------------------
>>>>
>>>>    Hi Brad,
>>>>
>>>>    I don't quite see why pixel spacing would interfere in any way with
>>>>    the process of streaming the pixel data.
>>>>
>>>>    As far of the streaming process is concerned, the pixel data is
>>>> simply
>>>>    an array of bytes...
>>>>
>>>>    It is more likely that other factors may be involved in this problem.
>>>>
>>>>
>>>>      Luis
>>>>
>>>>
>>>>
>>>    ========================================================
>>>
>>>    Bradley Lowekamp
>>>    Lockheed Martin Contractor for
>>>
>>>    Office of High Performance Computing and Communications
>>>
>>>    National Library of Medicine
>>>    blowekamp at mail.nih.gov <mailto:blowekamp at mail.nih.gov>
>>>
>>>
>>>
>>>
>>>    _______________________________________________
>>>    Insight-developers mailing list
>>>    Insight-developers at itk.org <mailto:Insight-developers at itk.org>
>>>    http://www.itk.org/mailman/listinfo/insight-developers
>>>
>>>
>>>
>>>
>>> --
>>> Stephen R. Aylward, Ph.D.
>>> Chief Medical Scientist
>>> Kitware, Inc. - North Carolina Office
>>> http://www.kitware.com
>>> (518) 371-3971 x300
>>>
>>
>
>
> --
> Stephen R. Aylward, Ph.D.
> Chief Medical Scientist
> Kitware, Inc. - North Carolina Office
> http://www.kitware.com
> (518) 371-3971 x300
>
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