ITK/Examples/Images/ConstantPadImageFilter: Difference between revisions

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<source lang="cpp">
<source lang="cpp">
#include "itkImage.h"
#include "itkImage.h"
#include "itkImageFileWriter.h"
#include "itkRescaleIntensityImageFilter.h"
#include "itkConstantPadImageFilter.h"
#include "itkConstantPadImageFilter.h"
#include "itkImageRegionIterator.h"
#include "itkImageRegionIterator.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"


typedef itk::Image<unsigned char, 2>  ImageType;
typedef itk::Image<unsigned char, 2>  ImageType;
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     = ConstantPadImageFilterType::New();
     = ConstantPadImageFilterType::New();
   padFilter->SetInput(image);
   padFilter->SetInput(image);
  //padFilter->SetPadBound(outputRegion); // Calls SetPadLowerBound(region) and SetPadUpperBound(region)
   padFilter->SetPadLowerBound(lowerExtendRegion);
   padFilter->SetPadLowerBound(lowerExtendRegion);
   padFilter->SetPadUpperBound(upperExtendRegion);
   padFilter->SetPadUpperBound(upperExtendRegion);
   padFilter->SetConstant(constantPixel);
   padFilter->SetConstant(constantPixel);
  padFilter->Update();
  // Visualize first image
  typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
  ConnectorType::Pointer originalConnector = ConnectorType::New();
  originalConnector->SetInput(image);
  vtkSmartPointer<vtkImageActor> originalActor =
    vtkSmartPointer<vtkImageActor>::New();
  originalActor->SetInput(originalConnector->GetOutput());
  // Visualize padded image
  ConnectorType::Pointer paddedConnector = ConnectorType::New();
  paddedConnector->SetInput(padFilter->GetOutput());
  vtkSmartPointer<vtkImageActor> paddedActor =
    vtkSmartPointer<vtkImageActor>::New();
  paddedActor->SetInput(paddedConnector->GetOutput());
  // There will be one render window
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->SetSize(600, 300);
  vtkSmartPointer<vtkRenderWindowInteractor> interactor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  interactor->SetRenderWindow(renderWindow);
  // 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<vtkRenderer> leftRenderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderWindow->AddRenderer(leftRenderer);
  leftRenderer->SetViewport(leftViewport);
  leftRenderer->SetBackground(.6, .5, .4);
  vtkSmartPointer<vtkRenderer> rightRenderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderWindow->AddRenderer(rightRenderer);
  rightRenderer->SetViewport(rightViewport);
  rightRenderer->SetBackground(.4, .5, .6);
  // Add the sphere to the left and the cube to the right
  leftRenderer->AddActor(originalActor);
  rightRenderer->AddActor(paddedActor);
  leftRenderer->ResetCamera();
  rightRenderer->ResetCamera();
  renderWindow->Render();
  vtkSmartPointer<vtkInteractorStyleImage> style =
    vtkSmartPointer<vtkInteractorStyleImage>::New();
  interactor->SetInteractorStyle(style);


   interactor->Start();
   QuickView viewer;
  viewer.AddImage<ImageType>(image);
  viewer.AddImage<ImageType>(padFilter->GetOutput());
  viewer.Visualize();


   return EXIT_SUCCESS;
   return EXIT_SUCCESS;

Revision as of 05:21, 12 December 2010

ConstantPadImageFilter.cxx

<source lang="cpp">

  1. include "itkImage.h"
  2. include "itkConstantPadImageFilter.h"
  3. include "itkImageRegionIterator.h"
  1. include "QuickView.h"

typedef itk::Image<unsigned char, 2> ImageType;

static void CreateImage(ImageType::Pointer image);

int main(int, char *[]) { 

 ImageType::Pointer image = ImageType::New();
 CreateImage(image);

 typedef itk::ConstantPadImageFilter <ImageType, ImageType>
   ConstantPadImageFilterType;

 ImageType::SizeType lowerExtendRegion;
 lowerExtendRegion[0] = 20;
 lowerExtendRegion[1] = 30;

 ImageType::SizeType upperExtendRegion;
 upperExtendRegion[0] = 50;
 upperExtendRegion[1] = 40;

 ImageType::PixelType constantPixel = 100;

 ConstantPadImageFilterType::Pointer padFilter
   = ConstantPadImageFilterType::New();
 padFilter->SetInput(image);
 padFilter->SetPadLowerBound(lowerExtendRegion);
 padFilter->SetPadUpperBound(upperExtendRegion);
 padFilter->SetConstant(constantPixel);

 QuickView viewer;
 viewer.AddImage<ImageType>(image);
 viewer.AddImage<ImageType>(padFilter->GetOutput());
 viewer.Visualize();

 return EXIT_SUCCESS;

}

void CreateImage(ImageType::Pointer image) { 

 // Create an image
 ImageType::RegionType region;
 ImageType::IndexType start;
 start[0] = 0;
 start[1] = 0;

 ImageType::SizeType size;
 unsigned int NumRows = 200;
 unsigned int NumCols = 300;
 size[0] = NumRows;
 size[1] = NumCols;

 region.SetSize(size);
 region.SetIndex(start);

 image->SetRegions(region);
 image->Allocate();

 // Make the whole image white
 itk::ImageRegionIterator<ImageType> iterator(image,image->GetLargestPossibleRegion());

 while(!iterator.IsAtEnd())
   {
   iterator.Set(255);
   ++iterator;
   }

} </source>

CMakeLists.txt

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

PROJECT(ConstantPadImageFilter)

include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)

FIND_PACKAGE(VTK REQUIRED) INCLUDE(${VTK_USE_FILE})

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

ADD_EXECUTABLE(ConstantPadImageFilter ConstantPadImageFilter.cxx) TARGET_LINK_LIBRARIES(ConstantPadImageFilter vtkHybrid ITKBasicFilters ITKCommon ITKIO)

</source>

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