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| <div class="floatcenter">[[File:ITK_Examples_Baseline_Iterators_TestImageRegionIterator.png]]</div>
| | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| This example demonstrates how to traverse an itkImage.
| | }} |
| | |
| ==ImageRegionIterator.cxx==
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| <source lang="cpp">
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| #include "itkImage.h"
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| #include "itkImageFileReader.h"
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| #include "itkImageRegionIterator.h"
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| | |
| #include <itkImageToVTKImageFilter.h>
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| | |
| #include "vtkImageViewer.h"
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| #include "vtkImageMapper3D.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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| | |
| int main(int argc, char*argv[])
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| {
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| if(argc < 2)
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| {
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| std::cerr << "Required: filename" << std::endl;
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| return EXIT_FAILURE;
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| }
| |
| | |
| typedef itk::Image<unsigned char, 2> ImageType;
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| | |
| typedef itk::ImageFileReader<ImageType> ReaderType;
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| ReaderType::Pointer reader = ReaderType::New();
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| reader->SetFileName(argv[1]);
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| reader->Update();
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| ImageType::Pointer image = reader->GetOutput();
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|
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| ImageType::SizeType regionSize;
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| regionSize[0] = 5;
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| regionSize[1] = 4;
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| ImageType::IndexType regionIndex;
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| regionIndex[0] = 0;
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| regionIndex[1] = 0;
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| ImageType::RegionType region;
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| region.SetSize(regionSize);
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| region.SetIndex(regionIndex);
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| itk::ImageRegionIterator<ImageType> imageIterator(image,region); | |
| | |
| while(!imageIterator.IsAtEnd())
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| {
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| // Get the value of the current pixel
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| //unsigned char val = imageIterator.Get();
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| //std::cout << (int)val << std::endl;
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| | |
| // Set the current pixel to white
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| imageIterator.Set(255);
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|
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| ++imageIterator;
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| }
| |
| | |
| // Visualize
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| typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
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| ConnectorType::Pointer connector = ConnectorType::New();
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| connector->SetInput(image);
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| | |
| vtkSmartPointer<vtkImageActor> actor =
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| vtkSmartPointer<vtkImageActor>::New();
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| #if VTK_MAJOR_VERSION <= 5
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| actor->SetInput(connector->GetOutput());
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| #else
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| connector->Update();
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| actor->GetMapper()->SetInputData(connector->GetOutput());
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| #endif
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| | |
| vtkSmartPointer<vtkRenderWindow> renderWindow =
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| vtkSmartPointer<vtkRenderWindow>::New();
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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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| | |
| vtkSmartPointer<vtkRenderer> renderer =
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| vtkSmartPointer<vtkRenderer>::New();
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| renderWindow->AddRenderer(renderer);
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| renderer->AddActor(actor);
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| renderer->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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| | |
| return EXIT_SUCCESS;
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| }
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| </source>
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| | |
| {{ITKVTKCMakeLists|ImageRegionIterator|}}
| |
