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