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| ==RegionGrowImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.}} |
| <source lang="cpp">
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| #include "itkImage.h"
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| #include "itkImageFileWriter.h"
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| #include "itkRegionGrowImageFilter.h"
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| #include "itkCastImageFilter.h"
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| | |
| #include <itkImageToVTKImageFilter.h>
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| #include "vtkImageViewer.h"
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| #include "vtkRenderWindowInteractor.h"
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| #include "vtkSmartPointer.h"
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| #include "vtkImageActor.h"
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| #include "vtkInteractorStyleImage.h"
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| #include "vtkRenderer.h"
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| | |
| typedef itk::Image< PixelType, Dimension > ImageType;
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| | |
| static void CreateImage(ImageType::Pointer image);
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| | |
| int main( int argc, char *argv[])
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| {
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| ImageType::Pointer image = ImageType::New();
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| CreateImage(image);
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| | |
| typedef itk::RegionGrowImageFilter<ImageType, ImageType> RegionGrowImageFilterType;
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| RegionGrowImageFilterType::Pointer regionGrow = RegionGrowImageFilterType::New();
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| float lower = 95.0;
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| float upper = 105.0;
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| regionGrow->SetLower(lower);
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| regionGrow->SetUpper(upper);
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| regionGrow->SetReplaceValue(255);
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| // Seed 1: (25, 35)
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| ImageType::IndexType seed1;
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| seed1[0] = 25;
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| seed1[1] = 35;
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| regionGrow->SetSeed(seed1);
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| regionGrow->SetInput(image);
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| | |
| // Seed 2: (110, 120)
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| ImageType::IndexType seed2;
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| seed2[0] = 110;
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| seed2[1] = 120;
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| regionGrow->SetSeed(seed2);
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| regionGrow->SetReplaceValue(150);
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| regionGrow->SetInput(image);
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| | |
| // Visualize
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| typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
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| ConnectorType::Pointer connector2 = ConnectorType::New();
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| connector2->SetInput(image2);
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| vtkSmartPointer<vtkImageActor> actor2 =
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| vtkSmartPointer<vtkImageActor>::New();
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| actor2->SetInput(connector2->GetOutput());
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| // Visualize joined image
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| ConnectorType::Pointer addConnector = ConnectorType::New();
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| addConnector->SetInput(addFilter->GetOutput());
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| vtkSmartPointer<vtkImageActor> addActor =
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| vtkSmartPointer<vtkImageActor>::New();
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| addActor->SetInput(addConnector->GetOutput());
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| | |
| // There will be one render window
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| vtkSmartPointer<vtkRenderWindow> renderWindow =
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| vtkSmartPointer<vtkRenderWindow>::New();
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| renderWindow->SetSize(900, 300);
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| vtkSmartPointer<vtkRenderWindowInteractor> interactor =
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| vtkSmartPointer<vtkRenderWindowInteractor>::New();
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| interactor->SetRenderWindow(renderWindow);
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| | |
| // Define viewport ranges
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| // (xmin, ymin, xmax, ymax)
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| double leftViewport[4] = {0.0, 0.0, 0.33, 1.0};
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| double centerViewport[4] = {0.33, 0.0, 0.66, 1.0};
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| double rightViewport[4] = {0.66, 0.0, 1.0, 1.0};
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| | |
| // Setup both renderers
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| vtkSmartPointer<vtkRenderer> leftRenderer =
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| vtkSmartPointer<vtkRenderer>::New();
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| renderWindow->AddRenderer(leftRenderer);
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| leftRenderer->SetViewport(leftViewport);
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| leftRenderer->SetBackground(.6, .5, .4);
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| vtkSmartPointer<vtkRenderer> centerRenderer =
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| vtkSmartPointer<vtkRenderer>::New();
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| renderWindow->AddRenderer(centerRenderer);
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| centerRenderer->SetViewport(centerViewport);
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| centerRenderer->SetBackground(.4, .5, .6);
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| vtkSmartPointer<vtkRenderer> rightRenderer =
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| vtkSmartPointer<vtkRenderer>::New();
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| renderWindow->AddRenderer(rightRenderer);
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| rightRenderer->SetViewport(rightViewport);
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| rightRenderer->SetBackground(.4, .5, .6); | |
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| // Add the sphere to the left and the cube to the right
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| leftRenderer->AddActor(actor1);
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| centerRenderer->AddActor(actor2);
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| rightRenderer->AddActor(addActor);
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| leftRenderer->ResetCamera();
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| centerRenderer->ResetCamera();
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| rightRenderer->ResetCamera();
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| renderWindow->Render();
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| | |
| vtkSmartPointer<vtkInteractorStyleImage> style =
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| vtkSmartPointer<vtkInteractorStyleImage>::New();
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| interactor->SetInteractorStyle(style);
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| interactor->Start();
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| | |
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| return EXIT_SUCCESS;
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| }
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| | |
| void CreateImage(ImageType::Pointer image)
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| {
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| // Create an image with 2 connected components
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| ImageType::RegionType region;
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| ImageType::IndexType start;
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| start[0] = 0;
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| start[1] = 0;
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| ImageType::SizeType size;
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| size[0] = 200;
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| size[1] = 300;
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| region.SetSize( size);
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| region.SetIndex(start);
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| image->SetRegions(region);
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| image->Allocate();
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| | |
| // Make a square
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| for(unsigned int r = 20; r < 80; r++)
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| {
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| for(unsigned int c = 30; c < 100; c++)
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| {
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| ImageType::IndexType pixelIndex;
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| pixelIndex[0] = r;
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| pixelIndex[1] = c;
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| image->SetPixel(pixelIndex, 100.0);
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| }
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| }
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| | |
| // Make another square
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| for(unsigned int r = 100; r < 130; r++)
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| {
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| for(unsigned int c = 115; c < 160; c++)
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| {
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| ImageType::IndexType pixelIndex;
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| pixelIndex[0] = r;
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| pixelIndex[1] = c;
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| image->SetPixel(pixelIndex, 100.0);
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| }
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| }
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| }
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| </source>
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| {{ITKVTKCMakeLists|{{SUBPAGENAME}}}}
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