[ITK] [ITK-users] How to abort execution of ImageRegistrationMethodv4 / Optimizer

[Matt McCormick]

Hi Bryn,

Thanks for looking into these issues.

Could a patches please be created to address them? [1].  I think a
separate patch could be created for each member.  The check for
AbortGenerateData should use the method:

  this->GetAbortGenerateData()

Thanks,
Matt

[1] https://insightsoftwareconsortium.github.io/ITKBarCamp-doc/CommunitySoftwareProcess/SubmitAPatchToGerrit/index.html

On Thu, Dec 4, 2014 at 5:48 PM, Bryn Lloyd <lloyd at itis.ethz.ch> wrote:
> At a first glance it seems that ImageRegistrationMethodv4 does not check for
> the abort flag:
>
> ImageRegistrationMethodv4<TFixedImage, TMovingImage, TTransform,
> TVirtualImage>
> ::GenerateData()
> {
>   this->AllocateOutputs();
>   for( this->m_CurrentLevel = 0; this->m_CurrentLevel <
> this->m_NumberOfLevels; this->m_CurrentLevel++ )
>     {
>     this->InitializeRegistrationAtEachLevel( this->m_CurrentLevel );
>
>     this->m_Metric->Initialize();
>
>     this->m_Optimizer->StartOptimization();
>     }
> }
>
> If I modify this code to check for m_AbortGenerateData, the registration
> terminates as expected.
>
>
> In addition it seems that the members m_CurrentMetricValue,
> m_CurrentIteration etc. are never updated during optimization.
>
> Best regards
> Bryn
>
>
>
>
> On 04.12.2014 23:18, Bryn Lloyd wrote:
>>
>> Hi
>>
>> I recently started using ITK again and am trying out the ITK registration
>> framework v4.
>>
>>
>> I am trying to gracefully abort/stop the ImageRegistrationMethodv4
>> process, however it just continues.
>>
>> In my Command class, which observes an IterationEvent of the
>> ImageRegistrationMethodv4 and Optimizer  I call
>> 1.  registration_method_v4->SetAbortGenerateData( true ); // object of
>> type ImageRegistrationMethodv4<...>
>>
>> 2. optimizer->StopOptimization();
>>
>> However, the process just continues to execute. Is this supposed to work?
>> What am I doing wrong?
>>
>> Thanks and best regards
>> Bryn
>>
>>
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>
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