tests/image/Dijkstra/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/Dijkstra.h>
  10 #include <fpa/Functors/Dijkstra/Image/Gaussian.h>
  11
  12 // -------------------------------------------------------------------------
  13 const unsigned int Dim = 2;
  14 typedef unsigned char TInputPixel;
  15 typedef float         TOutputPixel;
  16 typedef itk::Image< TInputPixel, Dim >  TInputImage;
  17 typedef itk::Image< TOutputPixel, Dim > TOutputImage;
  18
  19 // -------------------------------------------------------------------------
  20 int main( int argc, char* argv[] )
  21 {
  22   // Get arguments
  23   if( argc < 7 )
  24   {
  25     std::cerr
  26       << "Usage: " << argv[ 0 ]
  27       << " input_image output_image output_marks output_mst"
  28       << " beta epsilon [seeds]"
  29       << std::endl;
  30     return( 1 );
  31
  32   } // fi
  33   std::string input_image_filename = argv[ 1 ];
  34   std::string output_image_filename = argv[ 2 ];
  35   std::string output_marks_filename = argv[ 3 ];
  36   std::string output_mst_filename = argv[ 4 ];
  37   double beta = std::atof( argv[ 5 ] );
  38   double eps = std::atof( argv[ 6 ] );
  39
  40   // Read image
  41   typedef itk::ImageFileReader< TInputImage > TInputImageReader;
  42   TInputImageReader::Pointer input_image_reader = TInputImageReader::New( );
  43   input_image_reader->SetFileName( input_image_filename );
  44
  45   // Prepare weight functor
  46   typedef fpa::Functors::Dijkstra::Image::Gaussian< TInputImage, TOutputPixel > TWeight;
  47   TWeight::Pointer weight = TWeight::New( );
  48   weight->SetBeta( beta );
  49   weight->SetEpsilon( eps );
  50
  51   // Prepare filter
  52   typedef fpa::Filters::Image::Dijkstra< TInputImage, TOutputImage > TFilter;
  53   TFilter::Pointer filter = TFilter::New( );
  54   filter->SetInput( input_image_reader->GetOutput( ) );
  55   filter->SetWeightFunction( weight );
  56
  57   // Get all seeds
  58   for( int i = 7; i < argc; i += Dim )
  59   {
  60     TInputImage::IndexType seed;
  61     for( int j = 0; j < Dim; ++j )
  62       if( i + j < argc )
  63         seed[ j ] = std::atoi( argv[ i + j ] );
  64     filter->AddSeed( seed );
  65
  66   } // rof
  67
  68   // Execute filter
  69   filter->Update( );
  70
  71   // Save results
  72   typedef itk::ImageFileWriter< TFilter::TOutputImage > TOutputWriter;
  73   TOutputWriter::Pointer output_writer = TOutputWriter::New( );
  74   output_writer->SetInput( filter->GetOutput( ) );
  75   output_writer->SetFileName( output_image_filename );
  76
  77   typedef itk::ImageFileWriter< TFilter::TMarksImage > TMarksWriter;
  78   TMarksWriter::Pointer marks_writer = TMarksWriter::New( );
  79   marks_writer->SetInput( filter->GetMarks( ) );
  80   marks_writer->SetFileName( output_marks_filename );
  81
  82   typedef itk::ImageFileWriter< TFilter::TMST > TMSTWriter;
  83   TMSTWriter::Pointer mst_writer = TMSTWriter::New( );
  84   mst_writer->SetInput( filter->GetMinimumSpanningTree( ) );
  85   mst_writer->SetFileName( output_mst_filename );
  86
  87   try
  88   {
  89     output_writer->Update( );
  90     marks_writer->Update( );
  91     mst_writer->Update( );
  92   }
  93   catch( std::exception& err )
  94   {
  95     std::cerr << "Error caught: " << err.what( ) << std::endl;
  96     return( 1 );
  97
  98   } // yrt
  99
 100   return( 0 );
 101 }
 102
 103 // eof - $RCSfile$