[Insight-users] How to disconnect a pipeline

[Martin Styner]

Hi Luis
Yes, that worked ! Thanks, much 'nicer' than my solution. Nevertheless, 
for curiosity sake, what would be the best way to disconnect an image 
fully from the pipeline and free the whole pipeline before the image, 
e.g. to be processed by a routine from a different libary (THERE, I 
dared to say the taboo-word... ;) ).

Best regads
Martin

Luis Ibanez wrote:
> Hi Martin,
> 
> I'm wondering if you tried the ReleaseData
> flag on the filters.
> 
> ProcessObject (superclass of all the filters)
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1ProcessObject.html
> 
> has methods
> 
>   void SetReleaseDataFlag (bool flag)
>   bool GetReleaseDataFlag ()
>   void ReleaseDataFlagOn ()
>   void ReleaseDataFlagOff ()
> 
> that should allow to release the memory of the
> initial filters once their output is processed
> by the following filters.
> 
> In the case you cite, probably adding
> 
>    FilterA->ReleaseDataFlagOn();
>    FilterB->ReleaseDataFlagOn();
> 
> before updating the pipeline should produce
> the desired effect of releasing memory as the
> pipeline progress.
> 
> 
>    Luis
> 
> 
> =========================================================
> 
> Martin Styner wrote:
> 
>> Hi everybody
>> I have a question in regard to the itk pipeline system.
>> In some cases my pipeline has grown too large so that I run out of 
>> memory. Now I want to separate as nicely as possible the pipeline into 
>> 2 separate parts.
>> The 'nicest' I could so far come up with is the following:
>>
>> Before:
>>
>> FilterB->SetInput(FilterA->GetOutput());
>> FilterC->SetInput(FilterB->GetOutput());
>>
>> After:
>>
>> FilterB->SetInput(FilterA->GetOutput());
>> FilterB->Update();
>> ImageOutB = FilterB->GetOutput();
>> ImageOutB->DisconnectPipeline();
>> FilterA->Delete();
>> // Can't do a FilterB->Delete(), otherwise ImageOutB iscorrupted ?
>> FilterC->SetInput(ImageOutB);
>>
>> Is there maybe an easy way to create a Duplicate of an image, this 
>> would solve the whole business.
>>
>> Regards
>> Martin
>>
>>
> 
> 
> 
> 
> 
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-- 
Martin Styner, PhD. Ing. ETH
Group Head Medical Image Analysis for Orthopaedics
M.E. Mueller Institute for Biomechanics
Center for Computed Assisted Surgery
University of Bern
Murtenstrasse 35
P.O.Box 30
CH - 3010 Bern
Switzerland
Tel office: ++41-31-632-0940 , FAX: ++41-31-632-4951
email: Martin.Styner@memot.unibe.ch, martin_styner@ieee.org
WWW: http://cranium.unibe.ch/~mstyner