ITK/Examples/EdgesAndGradients/GradientMagnitudeImageFilter: Difference between revisions

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(Use QuickView)
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#include "itkGradientMagnitudeImageFilter.h"
#include "itkGradientMagnitudeImageFilter.h"


#include <itkImageToVTKImageFilter.h>
#include "QuickView.h"
 
#include "vtkImageViewer.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSmartPointer.h"
#include "vtkImageActor.h"
#include "vtkInteractorStyleImage.h"
#include "vtkRenderer.h"


int main(int argc, char * argv[])
int main(int argc, char * argv[])
Line 30: Line 23:


   // Setup types
   // Setup types
  typedef itk::Image< unsigned char,  2 >  UnsignedCharImageType;
   typedef itk::Image< float,  2 >  FloatImageType;
   typedef itk::Image< float,  2 >  FloatImageType;
  typedef itk::Image< unsigned char, 2 >  UnsignedCharImageType;
   typedef itk::ImageFileReader< UnsignedCharImageType >  readerType;
   typedef itk::ImageFileReader< UnsignedCharImageType >  readerType;


Line 47: Line 39:
   gradientFilter->Update();
   gradientFilter->Update();


   // To write the gradient image file, we must rescale the gradient values
   QuickView viewer;
  // to a reasonable range
   viewer.AddImage<UnsignedCharImageType>(reader->GetOutput());
  typedef itk::RescaleIntensityImageFilter<
   viewer.AddImage<FloatImageType>(gradientFilter->GetOutput());
  FloatImageType, UnsignedCharImageType > rescaleFilterType;
   viewer.Visualize();
 
   rescaleFilterType::Pointer rescaler = rescaleFilterType::New();
  rescaler->SetOutputMinimum(0);
  rescaler->SetOutputMaximum(255);
  rescaler->SetInput( gradientFilter->GetOutput() );
  rescaler->Update();
 
  typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
  ConnectorType::Pointer originalConnector = ConnectorType::New();
  originalConnector->SetInput(reader->GetOutput());
 
   vtkSmartPointer<vtkImageActor> originalActor =
    vtkSmartPointer<vtkImageActor>::New();
  originalActor->SetInput(originalConnector->GetOutput());
 
  typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
   ConnectorType::Pointer gradientMagnitudeConnector = ConnectorType::New();
  gradientMagnitudeConnector->SetInput(rescaler->GetOutput());
 
  vtkSmartPointer<vtkImageActor> gradientMagnitudeActor =
    vtkSmartPointer<vtkImageActor>::New();
  gradientMagnitudeActor->SetInput(gradientMagnitudeConnector->GetOutput());
 
  // Define viewport ranges
  // (xmin, ymin, xmax, ymax)
  double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
  double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
 
  // Setup both renderers
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->SetSize(600,300);
 
  vtkSmartPointer<vtkRenderer> leftRenderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderWindow->AddRenderer(leftRenderer);
  leftRenderer->SetViewport(leftViewport);
 
  vtkSmartPointer<vtkRenderer> rightRenderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderWindow->AddRenderer(rightRenderer);
  rightRenderer->SetViewport(rightViewport);
 
  leftRenderer->AddActor(originalActor);
  rightRenderer->AddActor(gradientMagnitudeActor);
 
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  vtkSmartPointer<vtkInteractorStyleImage> style =
    vtkSmartPointer<vtkInteractorStyleImage>::New();
 
  renderWindowInteractor->SetInteractorStyle(style);
 
  renderWindowInteractor->SetRenderWindow(renderWindow);
  renderWindowInteractor->Initialize();
 
  renderWindowInteractor->Start();


   return EXIT_SUCCESS;
   return EXIT_SUCCESS;

Revision as of 00:33, 18 November 2010

GradientMagnitudeImageFilter.cxx

<source lang="cpp">

  1. include "itkImage.h"
  2. include "itkImageFileReader.h"
  3. include "itkImageFileWriter.h"
  4. include "itkRescaleIntensityImageFilter.h"
  5. include "itkGradientMagnitudeImageFilter.h"
  1. include "QuickView.h"

int main(int argc, char * argv[]) { 

 // Verify command line arguments
 if( argc < 2 )
   {

std::cerr << "Usage: " << std::endl; std::cerr << argv[0] << "inputImageFile" << std::endl; return EXIT_FAILURE; 

   }

 // Parse command line arguments
 std::string inputFilename = argv[1];

 // Setup types
 typedef itk::Image< unsigned char,  2 >  UnsignedCharImageType;
 typedef itk::Image< float,  2 >   FloatImageType;
 typedef itk::ImageFileReader< UnsignedCharImageType >  readerType;

 typedef itk::GradientMagnitudeImageFilter<

UnsignedCharImageType, FloatImageType > filterType; 

 // Create and setup a reader
 readerType::Pointer reader = readerType::New();
 reader->SetFileName( inputFilename.c_str() );

 // Create and setup a gradient filter
 filterType::Pointer gradientFilter = filterType::New();
 gradientFilter->SetInput( reader->GetOutput() );
 gradientFilter->Update();

 QuickView viewer;
 viewer.AddImage<UnsignedCharImageType>(reader->GetOutput());
 viewer.AddImage<FloatImageType>(gradientFilter->GetOutput());
 viewer.Visualize();

 return EXIT_SUCCESS;

} </source>

CMakeLists.txt

<source lang="cmake"> cmake_minimum_required(VERSION 2.6)

PROJECT(GradientMagnitudeImageFilter)

FIND_PACKAGE(ITK REQUIRED) INCLUDE(${ITK_USE_FILE})

ADD_EXECUTABLE(GradientMagnitudeImageFilter GradientMagnitudeImageFilter.cxx) TARGET_LINK_LIBRARIES(Gradient vtkHybrid ITKBasicFilters ITKIO ITKCommon) </source>

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