[Insight-users] how to halt iteration

[Yixun Liu]

Hi,

My pipeline is as below,

reader--->ShapeDetectoionLevelSet---->BinaryThresholdImageFilter

I call BinaryThresholdImageFilter->Update() to trigger the pipeline. I use Observer CommandIterationUpdate_ShapeDetection to observe the result of each iteration of LevelSet. I want to halt the iteration when I observe the result has reach my requirement and set the flag enableHalt to true. I do as below 

class CommandIterationUpdate_ShapeDetection : public itk::Command 
{
.............

  void Execute(itk::Object *caller, const itk::EventObject & event)
 {
      levelSetPointer levelSet = 
        dynamic_cast< levelSetPointer >( caller );
      if( typeid( event ) != typeid( itk::IterationEvent ) )
        {
        return;
        }


          if(this->enableHalt)
          {
                levelSet->AbortGenerateDataOn();
                return;
          }
 }

............ 
}

However, exception is thrown. The reason maybe that levelset abort generating the data instead of passing the data to next filter. Which method should I use to halt the iteration?

Regards,

Yixun Liu
  
   
   
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