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| Image doesn't seem to be shrunk?
| | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| | | }} |
| ==ShrinkImageFilter.cxx== | |
| <source lang="cpp">
| |
| #include "itkImage.h"
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| #include "itkImageFileWriter.h"
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| #include "itkRescaleIntensityImageFilter.h"
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| #include "itkShrinkImageFilter.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<unsigned char, 2> ImageType;
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| | |
| void CreateImage(ImageType::Pointer image);
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| | |
| int main(int, char *[])
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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::ShrinkImageFilter <ImageType, ImageType>
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| ShrinkImageFilterType;
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| | |
| ShrinkImageFilterType::Pointer shrinkFilter
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| = ShrinkImageFilterType::New();
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| shrinkFilter->SetInput(image);
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| shrinkFilter->SetShrinkFactor(0, 2);
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| shrinkFilter->Update();
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| | |
| // Visualize first image
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| typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
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| ConnectorType::Pointer originalConnector = ConnectorType::New();
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| originalConnector->SetInput(image);
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| | |
| vtkSmartPointer<vtkImageActor> originalActor =
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| vtkSmartPointer<vtkImageActor>::New();
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| originalActor->SetInput(originalConnector->GetOutput());
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| | |
| // Visualize padded image
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| ConnectorType::Pointer shrunkConnector = ConnectorType::New();
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| shrunkConnector->SetInput(shrinkFilter->GetOutput());
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| | |
| vtkSmartPointer<vtkImageActor> shrunkActor =
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| vtkSmartPointer<vtkImageActor>::New();
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| shrunkActor->SetInput(shrunkConnector->GetOutput());
| |
| | |
| // 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(600, 300);
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| | |
| vtkSmartPointer<vtkRenderWindowInteractor> interactor =
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| vtkSmartPointer<vtkRenderWindowInteractor>::New();
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| interactor->SetRenderWindow(renderWindow);
| |
| | |
| // Define viewport ranges
| |
| // (xmin, ymin, xmax, ymax)
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| double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
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| double rightViewport[4] = {0.5, 0.0, 1.0, 1.0}; | |
| | |
| // 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> 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
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| leftRenderer->AddActor(originalActor);
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| rightRenderer->AddActor(shrunkActor);
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| | |
| leftRenderer->ResetCamera();
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| rightRenderer->ResetCamera();
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| | |
| renderWindow->Render();
| |
| | |
| 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;
| |
| }
| |
| | |
| 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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| 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();
| |
| | |
| // 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 < 30; 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, 200);
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| }
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| }
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| }
| |
| | |
| </source>
| |
| | |
| ==CMakeLists.txt==
| |
| <source lang="cmake">
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| cmake_minimum_required(VERSION 2.6)
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| | |
| PROJECT(ShrinkImageFilter)
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| | |
| include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)
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| | |
| FIND_PACKAGE(VTK REQUIRED)
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| INCLUDE(${VTK_USE_FILE})
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| | |
| FIND_PACKAGE(ITK REQUIRED)
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| INCLUDE(${ITK_USE_FILE})
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| | |
| ADD_EXECUTABLE(ShrinkImageFilter ShrinkImageFilter.cxx)
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| TARGET_LINK_LIBRARIES(ShrinkImageFilter
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| vtkHybrid
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| ITKBasicFilters ITKCommon ITKIO)
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| | |
| </source>
| |
