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[FrontAlgorithms.git] / tests / image / RandomWalker / Gaussian.cxx

diff --git a/tests/image/RandomWalker/Gaussian.cxx b/tests/image/RandomWalker/Gaussian.cxx
new file mode 100644 (file)
index 0000000..82d44ae
--- /dev/null
+++ b/tests/image/RandomWalker/Gaussian.cxx
@@ -0,0 +1,91 @@
+// =========================================================================
+// @author Leonardo Florez Valencia
+// @email florez-l@javeriana.edu.co
+// =========================================================================
+
+#include <itkImage.h>
+#include <itkImageFileReader.h>
+#include <itkImageFileWriter.h>
+#include <fpa/Filters/Image/RandomWalker.h>
+#include <fpa/Functors/Dijkstra/Image/Gaussian.h>
+
+// -------------------------------------------------------------------------
+const unsigned int Dim = 2;
+typedef unsigned char TPixel;
+typedef unsigned char TLabel;
+typedef float TCost;
+typedef itk::Image< TPixel, Dim > TImage;
+typedef itk::Image< TLabel, Dim > TLabelImage;
+
+// -------------------------------------------------------------------------
+int main( int argc, char* argv[] )
+{
+  // Get arguments
+  if( argc < 7 )
+  {
+    std::cerr
+      << "Usage: " << argv[ 0 ]
+      << " input_image input_label output_image output_costs alpha beta"
+      << std::endl;
+    return( 1 );
+
+  } // fi
+  std::string input_image_filename = argv[ 1 ];
+  std::string input_label_filename = argv[ 2 ];
+  std::string output_image_filename = argv[ 3 ];
+  std::string output_costs_filename = argv[ 4 ];
+  double alpha = std::atof( argv[ 5 ] );
+  double beta = std::atof( argv[ 6 ] );
+
+  // Read image
+  typedef itk::ImageFileReader< TImage > TImageReader;
+  TImageReader::Pointer input_image_reader = TImageReader::New( );
+  input_image_reader->SetFileName( input_image_filename );
+
+  // Read labels
+  typedef itk::ImageFileReader< TLabelImage > TLabelImageReader;
+  TLabelImageReader::Pointer input_label_reader = TLabelImageReader::New( );
+  input_label_reader->SetFileName( input_label_filename );
+
+  // Prepare weight functor
+  typedef fpa::Functors::Dijkstra::Image::Gaussian< TImage, TCost > TWeight;
+  TWeight::Pointer weight = TWeight::New( );
+  weight->SetAlpha( alpha );
+  weight->SetBeta( beta );
+
+  // Prepare filter
+  typedef fpa::Filters::Image::RandomWalker< TImage, TLabelImage, TCost > TFilter;
+  TFilter::Pointer filter = TFilter::New( );
+  filter->SetInputImage( input_image_reader->GetOutput( ) );
+  filter->SetInputLabels( input_label_reader->GetOutput( ) );
+  filter->SetWeightFunction( weight );
+
+  // Execute filter
+  filter->Update( );
+
+  // Save results
+  typedef itk::ImageFileWriter< TFilter::TLabelImage > TOutputWriter;
+  TOutputWriter::Pointer output_writer = TOutputWriter::New( );
+  output_writer->SetInput( filter->GetOutputLabels( ) );
+  output_writer->SetFileName( output_image_filename );
+
+  typedef itk::ImageFileWriter< TFilter::TCostsImage > TCostsWriter;
+  TCostsWriter::Pointer costs_writer = TCostsWriter::New( );
+  costs_writer->SetInput( filter->GetOutputCosts( ) );
+  costs_writer->SetFileName( output_costs_filename );
+
+  try
+  {
+    output_writer->Update( );
+    costs_writer->Update( );
+  }
+  catch( std::exception& err )
+  {
+    std::cerr << "Error caught: " << err.what( ) << std::endl;
+    return( 1 );
+
+  } // yrt
+  return( 0 );
+}
+
+// eof - $RCSfile$