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| ==NeighborhoodOperatorImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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">
| | }} |
| #include "itkImage.h"
| |
| #include "itkNeighborhoodOperatorImageFunction.h"
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| #include "itkNeighborhoodOperator.h"
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| #include "itkNeighborhoodAllocator.h"
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| #include "itkNeighborhoodOperatorImageFilter.h"
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| #include "itkRescaleIntensityImageFilter.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"
| |
| | |
| typedef itk::Image<float, 2> FloatImageType;
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|
| |
| void CreateImage(FloatImageType::Pointer image);
| |
| | |
| class CustomOperator
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| : public itk::NeighborhoodOperator<float, 2>
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| {
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| // Count the number of valid neighbors and set the output pixel to that number.
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| // What we should see is that the number of neighbors is constant in the "middle"
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| // of the image and the number of neighbors is fewer on the edges. | |
| | |
| protected:
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| CoefficientVector GenerateCoefficients();
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| | |
| void Fill(const CoefficientVector &coeff)
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| {
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| //Superclass::FillCenteredDirectional(coeff);
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| }
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| };
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| | |
| CustomOperator::CoefficientVector CustomOperator::GenerateCoefficients()
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| {
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| std::cout << "Neighborhood size: " << this->GetSize() << std::endl;
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| /*
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| for(unsigned int i = 0; i < this->GetSize(); i++)
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| {
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| ImageType::PixelType pixel = this->GetElement(i);
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| std::cout << "Pixel " << i << " : " << pixel << std::endl;
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| }
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| */
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| }
| |
| | |
| int main(int, char*[])
| |
| {
| |
| | |
| FloatImageType::Pointer image = FloatImageType::New();
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| CreateImage(image);
| |
| | |
| CustomOperator customOperator;
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|
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| itk::NeighborhoodOperatorImageFilter<FloatImageType, FloatImageType>::Pointer filter
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| = itk::NeighborhoodOperatorImageFilter<FloatImageType, FloatImageType>::New();
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| filter->SetOperator(customOperator);
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| filter->SetInput(image);
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| filter->Update();
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|
| |
| // Visualize
| |
| typedef itk::RescaleIntensityImageFilter< FloatImageType, itk::Image<unsigned char, 2> > RescaleFilterType;
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| RescaleFilterType::Pointer rescaleFilter = RescaleFilterType::New();
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| rescaleFilter->SetInput(filter->GetOutput());
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| rescaleFilter->SetOutputMinimum(0);
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| rescaleFilter->SetOutputMaximum(255);
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|
| |
| typedef itk::ImageToVTKImageFilter<itk::Image<unsigned char, 2> > ConnectorType;
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| ConnectorType::Pointer connector = ConnectorType::New();
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| connector->SetInput(rescaleFilter->GetOutput());
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| | |
| vtkSmartPointer<vtkImageActor> actor =
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| vtkSmartPointer<vtkImageActor>::New();
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| actor->SetInput(connector->GetOutput());
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| | |
| vtkSmartPointer<vtkRenderWindow> renderWindow =
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| vtkSmartPointer<vtkRenderWindow>::New();
| |
| | |
| 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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| }
| |
| | |
| void CreateImage(FloatImageType::Pointer image)
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| {
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| // Create an image with 2 connected components
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| FloatImageType::RegionType region;
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| FloatImageType::IndexType start;
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| start[0] = 0;
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| start[1] = 0;
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| | |
| FloatImageType::SizeType size;
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| unsigned int NumRows = 200;
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| unsigned int NumCols = 300;
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| size[0] = NumRows;
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| size[1] = NumCols;
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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 = 20; c < 80; c++)
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| {
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| FloatImageType::IndexType pixelIndex;
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| pixelIndex[0] = r;
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| pixelIndex[1] = c;
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| | |
| image->SetPixel(pixelIndex, 15);
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| }
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| }
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| }
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| </source>
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| | |
| {{ITKVTKCMakeLists|NeighborhoodOperatorImageFilter|}}
| |
