[ITK Community] [Insight-users] placing my ->Update() properly

[Tim Bhatnagar]

hello all,

I am receiving a "largest possible region does not fully contain requested
paste..." error on execution of my program.. I'm fairly certain I have
botched my pipeline flow.. can anyone point out the error for me?

******************************************
 reader->SetFileName( argv[1] );

  reader->Update();

  // Obtaining an input displacement field
  DisplacementFieldType::Pointer field = reader->GetOutput();


  DisplacementFieldType::RegionType region =
field->GetLargestPossibleRegion();

   itk::ImageRegionIteratorWithIndex< DisplacementFieldType > it( field,
region );

  filter->SetInput( reader->GetOutput() );

  filter->SetSubsamplingFactor( 16 );

  filter->Update();

  try
    {
    filter->UpdateLargestPossibleRegion();
    }
  catch( itk::ExceptionObject & excp )
    {
    std::cerr << "Exception thrown " << std::endl;
    std::cerr << excp << std::endl;
    }

  // Write an image for regression testing
  typedef itk::ImageFileWriter<  DisplacementFieldType  > WriterType;

  WriterType::Pointer writer = WriterType::New();

  writer->SetInput (filter->GetOutput() );
  writer->SetFileName( argv[2] );

  try
    {
    writer->Update();
    }
  catch( itk::ExceptionObject & excp )
    {
    std::cerr << "Exception thrown by writer" << std::endl;
    std::cerr << excp << std::endl;
    return EXIT_FAILURE;
    }
****************************

Many thanks!

-- 
Tim Bhatnagar
PhD Candidate
Orthopaedic Injury Biomechanics Group
Department of Mechanical Engineering
University of British Columbia

Rm 5000 - 818 West 10th Ave.
Vancouver, BC
Canada
V5Z 1M9

Ph: (604) 675-8845
Fax: (604) 675-8820
Web: oibg.mech.ubc.ca
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