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 <itkRGBPixel.h>
   8 #include <itkImageToVTKImageFilter.h>
   9
  10 #include <fpa/Image/RegionGrow.h>
  11 #include <fpa/Image/Functors/RegionGrowAllBelongsFunction.h>
  12 #include <fpa/VTK/Image2DObserver.h>
  13
  14 #include "fpa_Utility.h"
  15
  16 // -------------------------------------------------------------------------
  17 const unsigned int Dim = 2;
  18 typedef unsigned char TPixel;
  19 typedef itk::Image< itk::RGBPixel< TPixel >, Dim > TColorImage;
  20 typedef itk::Image< TPixel, Dim >                  TImage;
  21
  22 // -------------------------------------------------------------------------
  23 int main( int argc, char* argv[] )
  24 {
  25   if( argc < 4 )
  26   {
  27     std::cerr
  28       << "Usage: " << argv[ 0 ]
  29       << " input_image neighborhood_order stop_at_one_front"
  30       << std::endl;
  31     return( 1 );
  32
  33   } // fi
  34   std::string input_image_fn = argv[ 1 ];
  35   unsigned int neighborhood_order = std::atoi( argv[ 2 ] );
  36   bool stop_at_one_front = ( std::atoi( argv[ 3 ] ) != 0 );
  37
  38   // Read image
  39   TColorImage::Pointer input_image;
  40   std::string err = fpa_Utility::ReadImage( input_image, input_image_fn );
  41   if( err != "" )
  42   {
  43     std::cerr << err << std::endl;
  44     return( 1 );
  45
  46   } // fi
  47
  48   // Show image and wait for, at least, one seed
  49   itk::ImageToVTKImageFilter< TColorImage >::Pointer vtk_input_image =
  50     itk::ImageToVTKImageFilter< TColorImage >::New( );
  51   vtk_input_image->SetInput( input_image );
  52   vtk_input_image->Update( );
  53
  54   fpa_Utility::Viewer2DWithSeeds viewer;
  55   viewer.SetImage( vtk_input_image->GetOutput( ) );
  56   while( viewer.GetNumberOfSeeds( ) == 0 )
  57     viewer.Start( );
  58
  59   // Region growing types
  60   typedef fpa::Image::RegionGrow< TColorImage, TImage > TFilter;
  61   typedef fpa::Image::Functors::
  62     RegionGrowAllBelongsFunction< TColorImage > TFunction;
  63
  64   // Prepare region grow function
  65   TFunction::Pointer function = TFunction::New( );
  66
  67   // Prepare region grow filter
  68   TFilter::Pointer filter = TFilter::New( );
  69   filter->SetInput( input_image );
  70   filter->SetGrowingFunction( function );
  71   filter->SetNeighborhoodOrder( neighborhood_order );
  72   filter->SetOutsideValue( TPixel( 0 ) );
  73   filter->SetInsideValue( std::numeric_limits< TPixel >::max( ) );
  74   filter->SetStopAtOneFront( stop_at_one_front );
  75
  76   // Associate seeds
  77   for( unsigned long s = 0; s < viewer.GetNumberOfSeeds( ); ++s )
  78   {
  79     TImage::PointType pnt;
  80     TImage::IndexType idx;
  81     viewer.GetSeed( pnt, s );
  82     if( input_image->TransformPhysicalPointToIndex( pnt, idx ) )
  83       filter->AddSeed( idx, 0 );
  84
  85   } // rof
  86
  87   // Prepare graphical debugger
  88   typedef fpa::VTK::Image2DObserver< TFilter, vtkRenderWindow > TDebugger;
  89   TDebugger::Pointer debugger = TDebugger::New( );
  90   debugger->SetRenderWindow( viewer.Window );
  91   debugger->SetRenderPercentage( 0.01 );
  92   filter->AddObserver( itk::AnyEvent( ), debugger );
  93   filter->ThrowEventsOn( );
  94
  95   // Go!
  96   filter->Update( );
  97
  98   // Some more interaction and finish
  99   viewer.Start( );
 100   return( 0 );
 101 }
 102
 103 // eof - $RCSfile$