DOC: Latex added to EdgeDensityExample

Examples/FeatureExtraction/EdgeDensityExample.cxx

@@ -22,7 +22,7 @@ PURPOSE.  See the above copyright notices for more information.
 #include "itkRescaleIntensityImageFilter.h"
 
 //  Software Guide : BeginCommandLineArgs
-//    INPUTS: {amst.png}
+//    INPUTS: {suburb2.jpeg}
 //    OUTPUTS: {EdgeDensityOutput.png}, {PrettyEdgeDensityOutput.png}
 //    3 30 10 1.0 0.01
 //  Software Guide : EndCommandLineArgs
@@ -118,12 +118,12 @@ int main(int argc, char* argv[] )
   typedef itk::CannyEdgeDetectionImageFilter<ImageType, ImageType>
                                                      CannyDetectorType;
 
-  // Software Guide : BeginCodeSnippet
+  // Software Guide : EndCodeSnippet
   // Software Guide : BeginLatex
   //
   // Finally, we can define the type for the edge density filter which
-  // takes as template the input image type, the edge detector type,
-  // the count fucntion type and the output image type.
+  // takes as template the input and output image types, the edge
+  // detector type, and the count fucntion type..
   //
   // Software Guide : EndLatex
 
@@ -131,29 +131,81 @@ int main(int argc, char* argv[] )
   typedef otb::EdgeDensityImageFilter<ImageType, ImageType, CannyDetectorType,
                      CountFunctionType> EdgeDensityFilterType;
 
-  /**Instancitation of an object*/
-  EdgeDensityFilterType::Pointer    filter =      EdgeDensityFilterType::New();
-  ReaderType::Pointer               reader =      ReaderType::New();
-  CannyDetectorType::Pointer        CannyFilter = CannyDetectorType::New();
+  // Software Guide : EndCodeSnippet
+  // Software Guide : BeginLatex
+  //
+  // We can now instantiate the different processing objects of the
+  // pipeline using the \code{New()} method.
+  //
+  // Software Guide : EndLatex
 
-  /** Set The input*/
-  reader->SetFileName(infname);
-  filter->SetInput(reader->GetOutput());
-  
-  /** Update the Canny Filter Information*/
-  CannyFilter->SetUpperThreshold(upperThreshold); 
-  CannyFilter->SetLowerThreshold(lowerThreshold);
-  CannyFilter->SetVariance(variance); 
-  CannyFilter->SetMaximumError(maximumError); 
+  // Software Guide : BeginCodeSnippet
+  ReaderType::Pointer               reader = ReaderType::New();
+  EdgeDensityFilterType::Pointer    filter = EdgeDensityFilterType::New();
+  CannyDetectorType::Pointer        cannyFilter = CannyDetectorType::New();
+  WriterType::Pointer               writer = WriterType::New();
+
+
+  // Software Guide : EndCodeSnippet
+  // Software Guide : BeginLatex
+  //
+  // The edge detection filter needs to be instantiated because we
+  // need to set its parameters. This is what we do here for the Canny
+  // filter.
+  //
+  // Software Guide : EndLatex
+
+  // Software Guide : BeginCodeSnippet
+  cannyFilter->SetUpperThreshold(upperThreshold); 
+  cannyFilter->SetLowerThreshold(lowerThreshold);
+  cannyFilter->SetVariance(variance); 
+  cannyFilter->SetMaximumError(maximumError); 
+
+  // Software Guide : EndCodeSnippet
+  // Software Guide : BeginLatex
+  //
+  // After that, we can pass the edge detector to the filter which
+  // will use it internally.
+  //
+  // Software Guide : EndLatex
 
-  filter->SetDetector(CannyFilter);
+  // Software Guide : BeginCodeSnippet
+  filter->SetDetector(cannyFilter);
+
+  // Software Guide : EndCodeSnippet
+  // Software Guide : BeginLatex
+  //
+  // Finally, we set the file names for the input and the output
+  // images and we plug the pipeline. The \code{Update()} method of
+  // the writer will trigger the processing.
+  //
+  // Software Guide : EndLatex
 
-  /** Write the output*/
-  WriterType::Pointer          writer = WriterType::New();
+  // Software Guide : BeginCodeSnippet
+  
+  reader->SetFileName(infname);
   writer->SetFileName(outfname);
+  
+  
+  filter->SetInput(reader->GetOutput());
   writer->SetInput(filter->GetOutput());
   writer->Update();
-
+  // Software Guide : EndCodeSnippet
+
+  //  Software Guide : BeginLatex
+  // Figure~\ref{fig:EDGEDENSITY_FILTER} shows the result of applying
+  // the edge density filter to an image.
+  // \begin{figure}
+  // \center
+  // \includegraphics[width=0.25\textwidth]{suburb2.eps}
+  // \includegraphics[width=0.25\textwidth]{PrettyEdgeDensityOutput.eps}
+  // \itkcaption[Edge Density Filter]{Result of applying the
+  // \doxygen{otb}{EdgeDensityImageFilter} to an image. From left to right :
+  // original image, edge density.}
+  // \label{fig:EDGEDENSITY_FILTER}
+  // \end{figure}
+  //
+  //  Software Guide : EndLatex
 
   /************* Image for printing **************/