appli/examples/example_ImageAlgorithmRegionGrow_MultipleThresholds.cxx

   1 #include <iostream>
   2 #include <limits>
   3 #include <set>
   4 #include <string>
   5
   6 #include <itkImage.h>
   7 #include <itkImageFileReader.h>
   8 #include <itkImageToVTKImageFilter.h>
   9
  10 #include <vtkImageActor.h>
  11 #include <vtkProperty.h>
  12 #include <vtkRenderer.h>
  13 #include <vtkRenderWindow.h>
  14 #include <vtkRenderWindowInteractor.h>
  15 #include <vtkSmartPointer.h>
  16 #include <vtkSphereSource.h>
  17
  18 #include <fpa/Image/RegionGrowWithMultipleThresholds.h>
  19 #include <fpa/VTK/ImageMPR.h>
  20 #include <fpa/VTK/Image3DObserver.h>
  21
  22 // -------------------------------------------------------------------------
  23 const unsigned int Dim = 3;
  24 typedef short TPixel;
  25 typedef double TScalar;
  26 typedef itk::Image< TPixel, Dim >  TImage;
  27 typedef itk::ImageToVTKImageFilter< TImage > TVTKImage;
  28
  29 typedef itk::ImageFileReader< TImage >   TImageReader;
  30
  31 typedef
  32 fpa::Image::RegionGrowWithMultipleThresholds< TImage >
  33 TFrontAlgorithm;
  34 typedef
  35 fpa::VTK::Image3DObserver< TFrontAlgorithm, vtkRenderWindow >
  36 TObserver;
  37
  38 // -------------------------------------------------------------------------
  39 int main( int argc, char* argv[] )
  40 {
  41   if( argc < 5 )
  42   {
  43     std::cerr
  44       << "Usage: " << argv[ 0 ]
  45       << " input_image thr_0 thr_1 n_samples" << std::endl;
  46     return( 1 );
  47
  48   } // fi
  49   std::string input_image_fn = argv[ 1 ];
  50   TPixel thr_0 = TPixel( std::atof( argv[ 2 ] ) );
  51   TPixel thr_1 = TPixel( std::atof( argv[ 3 ] ) );
  52   unsigned int n_samples = std::atoi( argv[ 4 ] );
  53
  54   // Read image
  55   TImageReader::Pointer input_image_reader = TImageReader::New( );
  56   input_image_reader->SetFileName( input_image_fn );
  57   try
  58   {
  59     input_image_reader->Update( );
  60   }
  61   catch( itk::ExceptionObject& err )
  62   {
  63     std::cerr << "Error caught: " << err << std::endl;
  64     return( 1 );
  65
  66   } // yrt
  67   TImage::ConstPointer input_image = input_image_reader->GetOutput( );
  68   TImage::SpacingType spac = input_image->GetSpacing( );
  69   double min_spac = spac[ 0 ];
  70   for( unsigned int d = 1; d < Dim; d++ )
  71     min_spac = ( spac[ d ] < min_spac )? spac[ d ]: min_spac;
  72
  73   TVTKImage::Pointer vtk_image = TVTKImage::New( );
  74   vtk_image->SetInput( input_image );
  75   vtk_image->Update( );
  76
  77   /* TODO
  78      vtkSmartPointer< vtkSphereSource > seed =
  79      vtkSmartPointer< vtkSphereSource >::New( );
  80      seed->SetCenter( seed_pnt[ 0 ], seed_pnt[ 1 ], seed_pnt[ 2 ] );
  81      seed->SetRadius( min_spac * double( 5 ) );
  82      seed->Update( );
  83   */
  84
  85   fpa::VTK::ImageMPR view;
  86   view.SetBackground( 0.3, 0.2, 0.8 );
  87   view.SetSize( 800, 800 );
  88   view.SetImage( vtk_image->GetOutput( ) );
  89   // TODO: view.AddPolyData( seed->GetOutput( ), 1, 0, 0 );
  90   view.Start( );
  91
  92   // Configure observer
  93   /* TODO
  94      TObserver::Pointer obs = TObserver::New( );
  95      obs->SetImage( input_image, view.GetWindow( ) );
  96
  97      // Configure algorithm
  98      TFrontAlgorithm::Pointer algorithm = TFrontAlgorithm::New( );
  99      algorithm->AddThresholds( thr_0, thr_1, n_samples );
 100
 101      TImage::IndexType seed_idx;
 102      input_image->TransformPhysicalPointToIndex( seed_pnt, seed_idx );
 103      algorithm->AddSeed( seed_idx, 0 );
 104
 105      algorithm->AddObserver( itk::AnyEvent( ), obs );
 106      algorithm->ThrowEventsOn( );
 107      algorithm->SetInput( input_image );
 108      algorithm->SetNeighborhoodOrder( 1 );
 109      algorithm->SetDerivativeThreshold( double( 3 ) );
 110      algorithm->Update( );
 111
 112      view.Start( );
 113   */
 114   return( 0 );
 115 }
 116
 117 // eof - $RCSfile$