tests/image/RandomWalker.cxx

   1 #include "BaseFunctions.h"
   2 #include <itkImage.h>
   3 #include <fpa/Image/RandomWalker.h>
   4 #include <fpa/Image/Functors/Dijkstra/Gaussian.h>
   5
   6 // -------------------------------------------------------------------------
   7 const unsigned int Dim = 2;
   8 typedef short         TPixel;
   9 typedef unsigned char TLabel;
  10 typedef float         TScalar;
  11
  12 typedef itk::Image< TPixel, Dim >                                    TInputImage;
  13 typedef itk::Image< TLabel, Dim >                                    TLabelImage;
  14 typedef fpa::Image::RandomWalker< TInputImage, TLabelImage, TScalar >    TFilter;
  15 typedef fpa::Image::Functors::Dijkstra::Gaussian< TInputImage, TScalar > TWeight;
  16
  17 // -------------------------------------------------------------------------
  18 int main( int argc, char* argv[] )
  19 {
  20   // Get arguments
  21   if( argc < 7 )
  22   {
  23     std::cerr
  24       << "Usage: " << argv[ 0 ]
  25       << " input_image [labels_image] output_image output_costs"
  26       << " alpha beta visual_debug"
  27       << std::endl;
  28     return( 1 );
  29
  30   } // fi
  31   int idx = ( argc == 7 )? 2: 3;
  32   std::string input_image_filename = argv[ 1 ];
  33   std::string labels_image_filename = ( argc == 8 )? argv[ 2 ]: "";
  34   std::string output_image_filename = argv[ idx ];
  35   std::string output_costs_filename = argv[ idx + 1 ];
  36   double alpha = std::atof( argv[ idx + 2 ] );
  37   double beta = std::atof( argv[ idx + 3 ] );
  38   bool visual_debug = ( argv[ idx + 4 ][ 0 ] == '1' );
  39
  40   // Read image
  41   TInputImage::Pointer image;
  42   std::string err0 = fpa::tests::image::Read( image, input_image_filename );
  43   if( err0 != "" )
  44   {
  45     std::cerr << "Error caught: " << err0 << std::endl;
  46     return( 1 );
  47
  48   } // fi
  49
  50   // Read label
  51   TLabelImage::Pointer labels;
  52   if( labels_image_filename != "" )
  53   {
  54     std::string err1 = fpa::tests::image::Read( labels, labels_image_filename );
  55     if( err1 != "" )
  56     {
  57       std::cerr << "Error caught: " << err1 << std::endl;
  58       return( 1 );
  59
  60     } // fi
  61
  62   } // fi
  63
  64   // Interact with image
  65   fpa::tests::image::Viewer< TFilter > viewer( image );
  66   if( visual_debug )
  67   {
  68     if( labels.IsNull( ) )
  69       viewer.ActivateBrushWidget( );
  70     viewer.Show( );
  71
  72   } // fi
  73
  74   // Prepare weight
  75   TWeight::Pointer weight = TWeight::New( );
  76   weight->SetAlpha( alpha );
  77   weight->SetBeta( beta );
  78
  79   // Prepare filter
  80   TFilter::Pointer filter = TFilter::New( );
  81   filter->SetInput( image );
  82   filter->SetWeightFunction( weight );
  83   if( labels.IsNull( ) )
  84     viewer.AssociateLabelsTo( filter );
  85   else
  86     filter->SetLabels( labels );
  87
  88   // Prepare visual debug and update
  89   if( visual_debug )
  90     viewer.ObserveFilter( filter );
  91   try
  92   {
  93     filter->Update( );
  94   }
  95   catch( std::exception& err )
  96   {
  97     std::cerr << "Error caught: " << err.what( ) << std::endl;
  98     return( 1 );
  99
 100   } // yrt
 101
 102   // Save results
 103   std::string err1 =
 104     fpa::tests::image::Write( filter->GetMarks( ), output_image_filename );
 105   std::string err2 =
 106     fpa::tests::image::Write( filter->GetOutput( ), output_costs_filename );
 107   if( err1 != "" ) std::cerr << "Error caught: " << err1 << std::endl;
 108   if( err2 != "" ) std::cerr << "Error caught: " << err2 << std::endl;
 109
 110   return( 0 );
 111 }
 112
 113 // eof - $RCSfile$