[Insight-users] Repeat use of filter

[srbh.garg at gmail.com]

Hello Jesse,


If you want to reuse a filter use UpdateLargestPossibleRegion() instead of Update() and make sure you do it for all filters before calling GetOutput(). 


HTH,

Saurabh





From: Jesse Ross-Jones
Sent: ‎Friday‎, ‎July‎ ‎19‎, ‎2013 ‎1‎:‎37‎ ‎AM
To: insight-users at itk.org





Hello,


I am using ITK to write a method which requires the repeated use of a couple filters. Instead of having to repeat code, is it possible for the filters to work within a loop instead? 

A simplified example of the working code is here:

  dilateFilter->SetInput(this->GetInput());
  dilateFilter->SetKernel(structuringElement);

  meanFilter->SetRadius(2);
  meanFilter->SetInput(dilateFilter->GetOutput());

  dilateFilter2->SetInput(meanFilter->GetOutput());
  dilateFilter2->SetKernel(structuringElement);

  meanFilter2->SetRadius(2);
  meanFilter2->SetInput(dilateFilter->GetOutput());

  dilateFilter3->SetInput(meanFilter2->GetOutput());
  dilateFilter3->SetKernel(structuringElement);

  meanFilter3->SetRadius(2);
  meanFilter3->SetInput(dilateFilter3->GetOutput());


I tried to replace the previous code with something the following, but the result produced only a black image. 


  dilateFilter->SetInput(this->GetInput());
  dilateFilter->SetKernel(structuringElement);

  meanFilter->SetRadius(2);
  meanFilter->SetInput(dilateFilter->GetOutput());

  for ( int j = 0 ; j < 3 ; j = j + 1 ){
     dilateFilter->SetInput(meanFilter->GetOutput());
     meanFilter->SetInput(dilateFilter->GetOutput());
     meanFilter->Update();
  }




Best Regards,


Jesse
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