appli/examples/example_Image_RegionGrow_AllRGBPixels.cxx

   1 #include <cstdlib>
   2 #include <iostream>
   3 #include <limits>
   4 #include <string>
   5
   6 #include <itkImage.h>
   7 #include <itkImageToVTKImageFilter.h>
   8 #include <itkRGBPixel.h>
   9
  10 #include <itkImageFileReader.h>
  11
  12 #include <vtkCamera.h>
  13 #include <vtkImageActor.h>
  14 #include <vtkInteractorStyleImage.h>
  15 #include <vtkPointHandleRepresentation3D.h>
  16 #include <vtkProperty.h>
  17 #include <vtkRenderer.h>
  18 #include <vtkRenderWindow.h>
  19 #include <vtkRenderWindowInteractor.h>
  20 #include <vtkSeedRepresentation.h>
  21 #include <vtkSeedWidget.h>
  22 #include <vtkSmartPointer.h>
  23
  24 #include <fpa/Image/RegionGrow.h>
  25 #include <fpa/Base/Functors/TautologyFunction.h>
  26 #include <fpa/VTK/Image2DObserver.h>
  27
  28 // -------------------------------------------------------------------------
  29 const unsigned int Dim = 2;
  30 typedef unsigned char TPixel;
  31
  32 typedef itk::Image< itk::RGBPixel< TPixel >, Dim > TColorImage;
  33 typedef itk::Image< TPixel, Dim >                  TImage;
  34 typedef itk::ImageToVTKImageFilter< TColorImage >  TVTKImage;
  35
  36 // -------------------------------------------------------------------------
  37 int main( int argc, char* argv[] )
  38 {
  39   if( argc < 4 )
  40   {
  41     std::cerr
  42       << "Usage: " << argv[ 0 ]
  43       << " input_image neighborhood_order stop_at_one_front"
  44       << std::endl;
  45     return( 1 );
  46
  47   } // fi
  48   std::string input_image_fn = argv[ 1 ];
  49   unsigned int neighborhood_order = std::atoi( argv[ 2 ] );
  50   bool stop_at_one_front = ( std::atoi( argv[ 3 ] ) != 0 );
  51
  52   // Read image
  53   itk::ImageFileReader< TColorImage >::Pointer input_image_reader =
  54     itk::ImageFileReader< TColorImage >::New( );
  55   input_image_reader->SetFileName( input_image_fn );
  56   try
  57   {
  58     input_image_reader->Update( );
  59   }
  60   catch( itk::ExceptionObject& err )
  61   {
  62     std::cerr
  63       << "Error while reading image from " << input_image_fn << ": "
  64       << err << std::endl;
  65     return( 1 );
  66
  67   } // yrt
  68   TColorImage::ConstPointer input_image = input_image_reader->GetOutput( );
  69   TVTKImage::Pointer vtk_input_image = TVTKImage::New( );
  70   vtk_input_image->SetInput( input_image );
  71   vtk_input_image->Update( );
  72
  73   // VTK visualization
  74   vtkSmartPointer< vtkImageActor > actor =
  75     vtkSmartPointer< vtkImageActor >::New( );
  76   actor->SetInputData( vtk_input_image->GetOutput( ) );
  77
  78   vtkSmartPointer< vtkRenderer > renderer =
  79     vtkSmartPointer< vtkRenderer >::New( );
  80   renderer->SetBackground( 0.1, 0.2, 0.7 );
  81   renderer->AddActor( actor );
  82   vtkSmartPointer< vtkRenderWindow > window =
  83     vtkSmartPointer< vtkRenderWindow >::New( );
  84   window->SetSize( 800, 800 );
  85   window->AddRenderer( renderer );
  86
  87   // Correct camera due to the loaded image
  88   vtkCamera* camera = renderer->GetActiveCamera( );
  89   camera->SetViewUp( 0, -1, 0 );
  90   camera->SetPosition( 0, 0, -1 );
  91   camera->SetFocalPoint( 0, 0, 0 );
  92
  93   // VTK interaction
  94   vtkSmartPointer< vtkInteractorStyleImage > imageStyle =
  95     vtkSmartPointer< vtkInteractorStyleImage >::New( );
  96   vtkSmartPointer< vtkRenderWindowInteractor > interactor =
  97     vtkSmartPointer< vtkRenderWindowInteractor >::New( );
  98   interactor->SetInteractorStyle( imageStyle );
  99   window->SetInteractor( interactor );
 100
 101   // Create the widget and its representation
 102   vtkSmartPointer< vtkPointHandleRepresentation3D > handle =
 103     vtkSmartPointer< vtkPointHandleRepresentation3D >::New( );
 104   handle->GetProperty( )->SetColor( 1, 0, 0 );
 105   vtkSmartPointer< vtkSeedRepresentation > rep =
 106     vtkSmartPointer< vtkSeedRepresentation >::New( );
 107   rep->SetHandleRepresentation( handle );
 108
 109   vtkSmartPointer< vtkSeedWidget > widget =
 110     vtkSmartPointer< vtkSeedWidget >::New( );
 111   widget->SetInteractor( interactor );
 112   widget->SetRepresentation( rep );
 113
 114   // Let some interaction
 115   interactor->Initialize( );
 116   renderer->ResetCamera( );
 117   window->Render( );
 118   widget->On( );
 119   interactor->Start( );
 120
 121   // Prepare region grow function
 122   typedef fpa::Base::Functors::TautologyFunction< TColorImage::PixelType > TFunction;
 123   TFunction::Pointer function = TFunction::New( );
 124
 125   // Prepare region grow filter
 126   typedef fpa::Image::RegionGrow< TColorImage, TImage > TFilter;
 127   TFilter::Pointer filter = TFilter::New( );
 128   filter->SetInput( input_image );
 129   filter->SetMembershipFunction( function );
 130   filter->SetNeighborhoodOrder( neighborhood_order );
 131   filter->SetOutsideValue( TPixel( 0 ) );
 132   filter->SetInsideValue( std::numeric_limits< TPixel >::max( ) );
 133   filter->SetStopAtOneFront( stop_at_one_front );
 134
 135   // Get user-given seeds
 136   for( unsigned int s = 0; s < rep->GetNumberOfSeeds( ); s++ )
 137   {
 138     double pos[ 3 ];
 139     rep->GetSeedWorldPosition( s, pos );
 140
 141     TImage::PointType pnt;
 142     pnt[ 0 ] = TImage::PointType::ValueType( pos[ 0 ] );
 143     pnt[ 1 ] = TImage::PointType::ValueType( pos[ 1 ] );
 144
 145     TImage::IndexType idx;
 146     if( input_image->TransformPhysicalPointToIndex( pnt, idx ) )
 147       filter->AddSeed( idx, 0 );
 148
 149   } // rof
 150
 151   // Prepare graphical debugger
 152   typedef fpa::VTK::Image2DObserver< TFilter, vtkRenderWindow > TDebugger;
 153   TDebugger::Pointer debugger = TDebugger::New( );
 154   debugger->SetRenderWindow( window );
 155   debugger->SetRenderPercentage( 0.001 );
 156   filter->AddObserver( itk::AnyEvent( ), debugger );
 157   filter->ThrowEventsOn( );
 158
 159   // Go!
 160   filter->Update( );
 161
 162   return( 0 );
 163 }
 164
 165 // eof - $RCSfile$