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| ==AbsImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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 "itkImageFileWriter.h"
| |
| #include "itkRescaleIntensityImageFilter.h"
| |
| #include "itkAbsImageFilter.h"
| |
| | |
| #include <itkImageToVTKImageFilter.h>
| |
| | |
| #include "vtkImageViewer.h"
| |
| #include "vtkRenderWindowInteractor.h"
| |
| #include "vtkSmartPointer.h"
| |
| #include "vtkImageActor.h"
| |
| #include "vtkInteractorStyleImage.h"
| |
| #include "vtkRenderer.h"
| |
| #include "vtkCamera.h"
| |
| | |
| typedef itk::Image<unsigned char, 2> UnsignedCharImageType;
| |
| typedef itk::Image<float, 2> FloatImageType;
| |
| | |
| static void CreateImage(FloatImageType::Pointer image);
| |
| | |
| int main(int, char *[])
| |
| {
| |
| FloatImageType::Pointer image = FloatImageType::New();
| |
| CreateImage(image);
| |
| | |
| // Rescale the image so that it can be displayed
| |
| typedef itk::RescaleIntensityImageFilter< FloatImageType, UnsignedCharImageType > FloatRescaleCastFilterType;
| |
| FloatRescaleCastFilterType::Pointer rescaleFilter = FloatRescaleCastFilterType::New();
| |
| rescaleFilter->SetInput(image);
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| rescaleFilter->SetOutputMinimum(0);
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| rescaleFilter->SetOutputMaximum(255);
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| rescaleFilter->Update();
| |
| | |
| // Take the absolute value of the image
| |
| typedef itk::AbsImageFilter <FloatImageType, UnsignedCharImageType>
| |
| AbsImageFilterType;
| |
| | |
| AbsImageFilterType::Pointer absFilter
| |
| = AbsImageFilterType::New ();
| |
| absFilter->SetInput(image);
| |
| absFilter->Update();
| |
| | |
| typedef itk::RescaleIntensityImageFilter< UnsignedCharImageType, UnsignedCharImageType > RescaleFilterType;
| |
| RescaleFilterType::Pointer absRescaleFilter = RescaleFilterType::New();
| |
| absRescaleFilter->SetInput(absFilter->GetOutput());
| |
| absRescaleFilter->SetOutputMinimum(0);
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| absRescaleFilter->SetOutputMaximum(255);
| |
| absRescaleFilter->Update();
| |
| | |
| // Visualize input image
| |
| typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
| |
| ConnectorType::Pointer originalConnector = ConnectorType::New();
| |
| originalConnector->SetInput(rescaleFilter->GetOutput());
| |
| | |
| vtkSmartPointer<vtkImageActor> actor =
| |
| vtkSmartPointer<vtkImageActor>::New();
| |
| actor->SetInput(originalConnector->GetOutput());
| |
| | |
| // Visualize abs image
| |
| ConnectorType::Pointer absConnector = ConnectorType::New();
| |
| absConnector->SetInput(absRescaleFilter->GetOutput());
| |
| | |
| vtkSmartPointer<vtkImageActor> absActor =
| |
| vtkSmartPointer<vtkImageActor>::New();
| |
| absActor->SetInput(absConnector->GetOutput());
| |
| | |
| // There will be one render window
| |
| vtkSmartPointer<vtkRenderWindow> renderWindow =
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| vtkSmartPointer<vtkRenderWindow>::New();
| |
| renderWindow->SetSize(600, 300);
| |
| | |
| vtkSmartPointer<vtkRenderWindowInteractor> interactor =
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| 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 =
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| vtkSmartPointer<vtkRenderer>::New();
| |
| renderWindow->AddRenderer(leftRenderer);
| |
| leftRenderer->SetViewport(leftViewport);
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| leftRenderer->SetBackground(.6, .5, .4);
| |
| | |
| 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); | |
| | |
| // Add the sphere to the left and the cube to the right
| |
| leftRenderer->AddActor(actor);
| |
| rightRenderer->AddActor(absActor);
| |
| leftRenderer->GetActiveCamera()->SetViewUp(0,-1,0);
| |
| leftRenderer->ResetCamera();
| |
| | |
| rightRenderer->GetActiveCamera()->SetViewUp(0,-1,0);
| |
| rightRenderer->ResetCamera();
| |
| | |
| renderWindow->Render();
| |
| | |
| vtkSmartPointer<vtkInteractorStyleImage> style =
| |
| vtkSmartPointer<vtkInteractorStyleImage>::New();
| |
| interactor->SetInteractorStyle(style);
| |
| | |
| interactor->Start();
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| void CreateImage(FloatImageType::Pointer image)
| |
| {
| |
| // Create an image with negative values
| |
| FloatImageType::RegionType region;
| |
| FloatImageType::IndexType start;
| |
| start[0] = 0;
| |
| start[1] = 0;
| |
| | |
| FloatImageType::SizeType size;
| |
| size[0] = 200;
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| size[1] = 300;
| |
| | |
| region.SetSize(size);
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| region.SetIndex(start);
| |
| | |
| image->SetRegions(region);
| |
| image->Allocate();
| |
| | |
| itk::ImageRegionIterator<FloatImageType> imageIterator(image,region);
| |
| | |
| while(!imageIterator.IsAtEnd())
| |
| {
| |
| imageIterator.Set(imageIterator.GetIndex()[0] - imageIterator.GetIndex()[1]);
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| ++imageIterator;
| |
| }
| |
| }
| |
| </source>
| |
| | |
| ==CMakeLists.txt==
| |
| <source lang="cmake">
| |
| cmake_minimum_required(VERSION 2.6)
| |
| | |
| PROJECT(AbsImageFilter)
| |
| | |
| include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)
| |
| | |
| FIND_PACKAGE(VTK REQUIRED)
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| INCLUDE(${VTK_USE_FILE})
| |
| | |
| FIND_PACKAGE(ITK REQUIRED)
| |
| INCLUDE(${ITK_USE_FILE})
| |
| | |
| ADD_EXECUTABLE(AbsImageFilter AbsImageFilter.cxx)
| |
| TARGET_LINK_LIBRARIES(AbsImageFilter
| |
| vtkHybrid
| |
| ITKBasicFilters ITKCommon ITKIO)
| |
| | |
| </source>
| |
