ITK/Examples/Broken/Images/ConnectedThresholdImageFilter

Just need to finish the visualization code.

ConnectedThresholdImageFilter.cxx

<source lang="cpp">

1. include "itkImage.h"
2. include "itkImageFileWriter.h"
3. include "itkConnectedThresholdImageFilter.h"
4. include "itkCastImageFilter.h"

1. include <itkImageToVTKImageFilter.h>

1. include "vtkImageViewer.h"
2. include "vtkRenderWindowInteractor.h"
3. include "vtkSmartPointer.h"
4. include "vtkImageActor.h"
5. include "vtkInteractorStyleImage.h"
6. include "vtkRenderer.h"

typedef itk::Image< PixelType, Dimension > ImageType;

void CreateImage(ImageType::Pointer image);

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

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

 typedef itk::ConnectedThresholdImageFilter<ImageType, ImageType> ConnectedFilterType;
 ConnectedFilterType::Pointer connectedThreshold = ConnectedFilterType::New();
 float lower = 95.0;
 float upper = 105.0;
 connectedThreshold->SetLower(lower);
 connectedThreshold->SetUpper(upper);

 connectedThreshold->SetReplaceValue(255);

 // Seed 1: (25, 35)
 ImageType::IndexType seed1;
 seed1[0] = 25;
 seed1[1] = 35;
 connectedThreshold->SetSeed(seed1);
 connectedThreshold->SetInput(image);

 // Seed 2: (110, 120)
 ImageType::IndexType seed2;
 seed2[0] = 110;
 seed2[1] = 120;
 connectedThreshold->SetSeed(seed2);
 connectedThreshold->SetReplaceValue(150);

 connectedThreshold->SetInput(image);

 // Visualize
 typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
 ConnectorType::Pointer connector2 = ConnectorType::New();
 connector2->SetInput(image2);

 vtkSmartPointer<vtkImageActor> actor2 =
   vtkSmartPointer<vtkImageActor>::New();
 actor2->SetInput(connector2->GetOutput());

 // Visualize joined image
 ConnectorType::Pointer addConnector = ConnectorType::New();
 addConnector->SetInput(addFilter->GetOutput());

 vtkSmartPointer<vtkImageActor> addActor =
   vtkSmartPointer<vtkImageActor>::New();
 addActor->SetInput(addConnector->GetOutput());

 // There will be one render window
 vtkSmartPointer<vtkRenderWindow> renderWindow =
   vtkSmartPointer<vtkRenderWindow>::New();
 renderWindow->SetSize(900, 300);

 vtkSmartPointer<vtkRenderWindowInteractor> interactor =
   vtkSmartPointer<vtkRenderWindowInteractor>::New();
 interactor->SetRenderWindow(renderWindow);

 // Define viewport ranges
 // (xmin, ymin, xmax, ymax)
 double leftViewport[4] = {0.0, 0.0, 0.33, 1.0};
 double centerViewport[4] = {0.33, 0.0, 0.66, 1.0};
 double rightViewport[4] = {0.66, 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> centerRenderer =
   vtkSmartPointer<vtkRenderer>::New();
 renderWindow->AddRenderer(centerRenderer);
 centerRenderer->SetViewport(centerViewport);
 centerRenderer->SetBackground(.4, .5, .6);

 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(actor1);
 centerRenderer->AddActor(actor2);
 rightRenderer->AddActor(addActor);

 leftRenderer->ResetCamera();
 centerRenderer->ResetCamera();
 rightRenderer->ResetCamera();

 renderWindow->Render();

 vtkSmartPointer<vtkInteractorStyleImage> style =
   vtkSmartPointer<vtkInteractorStyleImage>::New();
 interactor->SetInteractorStyle(style);

 interactor->Start();

 return EXIT_SUCCESS;

}

void CreateImage(ImageType::Pointer image) {

 // Create an image with 2 connected components
 ImageType::RegionType region;
 ImageType::IndexType start;
 start[0] = 0;
 start[1] = 0;

 ImageType::SizeType size;
 size[0] = 200;
 size[1] = 300;

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

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

 // Make a square
 for(unsigned int r = 20; r < 80; r++)
   {
   for(unsigned int c = 30; c < 100; c++)
     {
     ImageType::IndexType pixelIndex;
     pixelIndex[0] = r;
     pixelIndex[1] = c;

     image->SetPixel(pixelIndex, 100.0);
     }
   }

 // Make another square
 for(unsigned int r = 100; r < 130; r++)
   {
   for(unsigned int c = 115; c < 160; c++)
     {
     ImageType::IndexType pixelIndex;
     pixelIndex[0] = r;
     pixelIndex[1] = c;

     image->SetPixel(pixelIndex, 100.0);
     }
   }

} </source>

CMakeLists.txt

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

PROJECT(ConnectedThresholdImageFilter)

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(ConnectedThresholdImageFilter ConnectedThresholdImageFilter.cxx) TARGET_LINK_LIBRARIES(ConnectedThresholdImageFilter ITKIO )

</source>