tests/image/RandomWalker/Original.cxx

   1 // =========================================================================
   2 // @author Leonardo Florez Valencia
   3 // @email florez-l@javeriana.edu.co
   4 // =========================================================================
   5
   6 #include <itkImage.h>
   7 #include <itkImageFileReader.h>
   8 #include <itkImageFileWriter.h>
   9 #include <fpa/Common/OriginalRandomWalker.h>
  10
  11 // -------------------------------------------------------------------------
  12 const unsigned int Dim = 2;
  13 typedef unsigned char TPixel;
  14 typedef unsigned char TLabel;
  15
  16 typedef itk::Image< TPixel, Dim > TImage;
  17 typedef itk::Image< TLabel, Dim > TLabels;
  18
  19 // -------------------------------------------------------------------------
  20 int main( int argc, char* argv[] )
  21 {
  22   // Get input arguments
  23   if( argc < 8 )
  24   {
  25     std::cerr
  26       << "Usage: " << argv[ 0 ]
  27       << " input_image input_labels output_labels output_probabilities"
  28       << " beta eps normalize"
  29       << std::endl;
  30     return( 1 );
  31
  32   } // fi
  33   std::string input_image_filename, input_labels_filename;
  34   std::string output_labels_filename, output_probabilities_filename;
  35   double beta, eps;
  36   bool normalize;
  37   input_image_filename = argv[ 1 ];
  38   input_labels_filename = argv[ 2 ];
  39   output_labels_filename = argv[ 3 ];
  40   output_probabilities_filename = argv[ 4 ];
  41   beta = std::atof( argv[ 5 ] );
  42   eps = std::atof( argv[ 6 ] );
  43   normalize = ( argv[ 7 ][ 0 ] == '1' );
  44
  45   // Read image
  46   typedef itk::ImageFileReader< TImage > TImageReader;
  47   TImageReader::Pointer input_image_reader = TImageReader::New( );
  48   input_image_reader->SetFileName( input_image_filename );
  49
  50   // Read labels
  51   typedef itk::ImageFileReader< TLabels > TLabelsReader;
  52   TLabelsReader::Pointer input_labels_reader = TLabelsReader::New( );
  53   input_labels_reader->SetFileName( input_labels_filename );
  54
  55   // Random walker
  56   typedef fpa::Common::OriginalRandomWalker< TImage, TLabels > TFilter;
  57   TFilter::Pointer rw = TFilter::New( );
  58   rw->SetInput( input_image_reader->GetOutput( ) );
  59   rw->SetInputLabels( input_labels_reader->GetOutput( ) );
  60   rw->SetBeta( beta );
  61   rw->SetEpsilon( eps );
  62   rw->SetNormalizeWeights( normalize );
  63
  64   // Save labels
  65   typedef itk::ImageFileWriter< TFilter::TLabels > TLabelsWriter;
  66   TLabelsWriter::Pointer output_labels_writer = TLabelsWriter::New( );
  67   output_labels_writer->SetFileName( output_labels_filename );
  68   output_labels_writer->SetInput( rw->GetOutput( ) );
  69
  70   // Save probabilities
  71   typedef itk::ImageFileWriter< TFilter::TScalarImage > TProbabilitesWriter;
  72   TProbabilitesWriter::Pointer output_probabilities_writer =
  73     TProbabilitesWriter::New( );
  74   output_probabilities_writer->SetFileName( output_probabilities_filename );
  75   output_probabilities_writer->SetInput( rw->GetOutputProbabilities( ) );
  76
  77   try
  78   {
  79     output_labels_writer->Update( );
  80     output_probabilities_writer->Update( );
  81   }
  82   catch( std::exception& err )
  83   {
  84     std::cerr << "Error caught: " << err.what( ) << std::endl;
  85     return( 1 );
  86
  87   } // yrt
  88   return( 0 );
  89 }
  90
  91 // eof - $RCSfile$