appli/examples/example_Image_RegionGrow_AllPixels.cxx

   1 #include <cstdlib>
   2 #include <iostream>
   3 #include <limits>
   4 #include <string>
   5
   6 #include <itkImage.h>
   7 #include <itkImageToVTKImageFilter.h>
   8
   9 #include <fpa/Image/RegionGrow.h>
  10 #include <fpa/Image/Functors/RegionGrowAllBelongsFunction.h>
  11 #include <fpa/VTK/Image2DObserver.h>
  12
  13 #include "fpa_Utility.h"
  14
  15 // -------------------------------------------------------------------------
  16 const unsigned int Dim = 2;
  17 typedef unsigned char TPixel;
  18 typedef itk::Image< TPixel, Dim > TImage;
  19
  20 // -------------------------------------------------------------------------
  21 int main( int argc, char* argv[] )
  22 {
  23   if( argc < 4 )
  24   {
  25     std::cerr
  26       << "Usage: " << argv[ 0 ]
  27       << " input_image neighborhood_order stop_at_one_front"
  28       << std::endl;
  29     return( 1 );
  30
  31   } // fi
  32   std::string input_image_fn = argv[ 1 ];
  33   unsigned int neighborhood_order = std::atoi( argv[ 2 ] );
  34   bool stop_at_one_front = ( std::atoi( argv[ 3 ] ) != 0 );
  35
  36   // Read image
  37   TImage::Pointer input_image;
  38   std::string err = fpa_Utility::ReadImage( input_image, input_image_fn );
  39   if( err != "" )
  40   {
  41     std::cerr << err << std::endl;
  42     return( 1 );
  43
  44   } // fi
  45
  46   // Show image and wait for, at least, one seed
  47   itk::ImageToVTKImageFilter< TImage >::Pointer vtk_input_image =
  48     itk::ImageToVTKImageFilter< TImage >::New( );
  49   vtk_input_image->SetInput( input_image );
  50   vtk_input_image->Update( );
  51
  52   fpa_Utility::Viewer2DWithSeeds viewer;
  53   viewer.SetImage( vtk_input_image->GetOutput( ) );
  54   while( viewer.GetNumberOfSeeds( ) == 0 )
  55     viewer.Start( );
  56
  57   // Region growing types
  58   typedef fpa::Image::RegionGrow< TImage > TFilter;
  59   typedef fpa::Image::Functors::
  60     RegionGrowAllBelongsFunction< TImage > TFunction;
  61
  62   // Prepare region grow function
  63   TFunction::Pointer function = TFunction::New( );
  64
  65   // Prepare region grow filter
  66   TFilter::Pointer filter = TFilter::New( );
  67   filter->SetInput( input_image );
  68   filter->SetGrowingFunction( function );
  69   filter->SetNeighborhoodOrder( neighborhood_order );
  70   filter->SetOutsideValue( TPixel( 0 ) );
  71   filter->SetInsideValue( std::numeric_limits< TPixel >::max( ) );
  72   filter->SetStopAtOneFront( stop_at_one_front );
  73
  74   // Associate seeds
  75   for( unsigned long s = 0; s < viewer.GetNumberOfSeeds( ); ++s )
  76   {
  77     TImage::PointType pnt;
  78     TImage::IndexType idx;
  79     viewer.GetSeed( pnt, s );
  80     if( input_image->TransformPhysicalPointToIndex( pnt, idx ) )
  81       filter->AddSeed( idx, 0 );
  82
  83   } // rof
  84
  85   // Prepare graphical debugger
  86   typedef fpa::VTK::Image2DObserver< TFilter, vtkRenderWindow > TDebugger;
  87   TDebugger::Pointer debugger = TDebugger::New( );
  88   debugger->SetRenderWindow( viewer.Window );
  89   debugger->SetRenderPercentage( 0.01 );
  90   filter->AddObserver( itk::AnyEvent( ), debugger );
  91   filter->ThrowEventsOn( );
  92
  93   // Go!
  94   filter->Update( );
  95
  96   // Some more interaction and finish
  97   viewer.Start( );
  98   return( 0 );
  99 }
 100
 101 // eof - $RCSfile$