tests/image/RandomWalker/Gaussian.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/Filters/Image/RandomWalker.h>
  10 #include <fpa/Functors/Dijkstra/Image/Gaussian.h>
  11
  12 // -------------------------------------------------------------------------
  13 const unsigned int Dim = 2;
  14 typedef unsigned char TPixel;
  15 typedef unsigned char TLabel;
  16 typedef float TCost;
  17 typedef itk::Image< TPixel, Dim > TImage;
  18 typedef itk::Image< TLabel, Dim > TLabelImage;
  19
  20 // -------------------------------------------------------------------------
  21 int main( int argc, char* argv[] )
  22 {
  23   // Get arguments
  24   if( argc < 7 )
  25   {
  26     std::cerr
  27       << "Usage: " << argv[ 0 ]
  28       << " input_image input_label output_image output_costs alpha beta"
  29       << std::endl;
  30     return( 1 );
  31
  32   } // fi
  33   std::string input_image_filename = argv[ 1 ];
  34   std::string input_label_filename = argv[ 2 ];
  35   std::string output_image_filename = argv[ 3 ];
  36   std::string output_costs_filename = argv[ 4 ];
  37   double alpha = std::atof( argv[ 5 ] );
  38   double beta = std::atof( argv[ 6 ] );
  39
  40   // Read image
  41   typedef itk::ImageFileReader< TImage > TImageReader;
  42   TImageReader::Pointer input_image_reader = TImageReader::New( );
  43   input_image_reader->SetFileName( input_image_filename );
  44
  45   // Read labels
  46   typedef itk::ImageFileReader< TLabelImage > TLabelImageReader;
  47   TLabelImageReader::Pointer input_label_reader = TLabelImageReader::New( );
  48   input_label_reader->SetFileName( input_label_filename );
  49
  50   // Prepare weight functor
  51   typedef fpa::Functors::Dijkstra::Image::Gaussian< TImage, TCost > TWeight;
  52   TWeight::Pointer weight = TWeight::New( );
  53   weight->SetAlpha( alpha );
  54   weight->SetBeta( beta );
  55
  56   // Prepare filter
  57   typedef fpa::Filters::Image::RandomWalker< TImage, TLabelImage, TCost > TFilter;
  58   TFilter::Pointer filter = TFilter::New( );
  59   filter->SetInputImage( input_image_reader->GetOutput( ) );
  60   filter->SetInputLabels( input_label_reader->GetOutput( ) );
  61   filter->SetWeightFunction( weight );
  62
  63   // Execute filter
  64   filter->Update( );
  65
  66   // Save results
  67   typedef itk::ImageFileWriter< TFilter::TLabelImage > TOutputWriter;
  68   TOutputWriter::Pointer output_writer = TOutputWriter::New( );
  69   output_writer->SetInput( filter->GetOutputLabels( ) );
  70   output_writer->SetFileName( output_image_filename );
  71
  72   typedef itk::ImageFileWriter< TFilter::TCostsImage > TCostsWriter;
  73   TCostsWriter::Pointer costs_writer = TCostsWriter::New( );
  74   costs_writer->SetInput( filter->GetOutputCosts( ) );
  75   costs_writer->SetFileName( output_costs_filename );
  76
  77   try
  78   {
  79     output_writer->Update( );
  80     costs_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 - $RCSfile$