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| ==ConvolutionImageFilter.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| | {{warning|1=The media wiki content on this page is no longer maintained.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 "itkImageFileReader.h"
| |
| #include "itkImageFileWriter.h"
| |
| #include "itkRescaleIntensityImageFilter.h"
| |
| #include "itkConvolutionImageFilter.h"
| |
| #include "itkImageRegionIterator.h"
| |
| | |
| #include <itkImageToVTKImageFilter.h>
| |
| | |
| #include "vtkImageViewer.h"
| |
| #include "vtkRenderWindowInteractor.h"
| |
| #include "vtkSmartPointer.h"
| |
| #include "vtkImageActor.h"
| |
| #include "vtkInteractorStyleImage.h"
| |
| #include "vtkRenderer.h"
| |
| | |
| typedef itk::Image<unsigned char, 2> ImageType;
| |
| | |
| void CreateKernel(ImageType::Pointer kernel);
| |
| | |
| int main(int argc, char * argv[])
| |
| { | |
| // Verify command line arguments
| |
| if( argc < 2 )
| |
| {
| |
| std::cerr << "Usage: " << std::endl;
| |
| std::cerr << argv[0] << "inputImageFile" << std::endl;
| |
| return EXIT_FAILURE;
| |
| }
| |
| | |
| // Parse command line arguments
| |
| std::string inputFilename = argv[1];
| |
| | |
| ImageType::Pointer kernel = ImageType::New();
| |
| CreateKernel(kernel);
| |
|
| |
| typedef itk::ImageFileReader<ImageType> readerType;
| |
| | |
| typedef itk::ConvolutionImageFilter<ImageType> FilterType;
| |
| | |
| // Create and setup a reader
| |
| readerType::Pointer reader = readerType::New();
| |
| reader->SetFileName( inputFilename.c_str() );
| |
| | |
| // Convolve image with kernel.
| |
| FilterType::Pointer convolutionFilter = FilterType::New();
| |
| convolutionFilter->SetInput(reader->GetOutput());
| |
| convolutionFilter->SetImageKernelInput(kernel);
| |
| convolutionFilter->Update();
| |
| | |
| typedef itk::ImageFileWriter< ImageType > WriterType;
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetFileName("TestOutput.jpg");
| |
| writer->SetInput(convolutionFilter->GetOutput()); | |
| writer->Update();
| |
| | |
| // To visualize the derivative, we must rescale the values
| |
| // to a reasonable range
| |
| typedef itk::RescaleIntensityImageFilter<
| |
| ImageType, ImageType > rescaleFilterType;
| |
| | |
| rescaleFilterType::Pointer rescaler = rescaleFilterType::New();
| |
| rescaler->SetOutputMinimum(0);
| |
| rescaler->SetOutputMaximum(255);
| |
| rescaler->SetInput( convolutionFilter->GetOutput() );
| |
| rescaler->Update();
| |
| | |
| typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
| |
| ConnectorType::Pointer originalConnector = ConnectorType::New();
| |
| originalConnector->SetInput(reader->GetOutput());
| |
| | |
| vtkSmartPointer<vtkImageActor> originalActor =
| |
| vtkSmartPointer<vtkImageActor>::New();
| |
| originalActor->SetInput(originalConnector->GetOutput());
| |
| | |
| typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
| |
| ConnectorType::Pointer convolvedConnector = ConnectorType::New();
| |
| convolvedConnector->SetInput(rescaler->GetOutput());
| |
| | |
| vtkSmartPointer<vtkImageActor> convolvedActor =
| |
| vtkSmartPointer<vtkImageActor>::New();
| |
| convolvedActor->SetInput(convolvedConnector->GetOutput());
| |
| | |
| // 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<vtkRenderWindow> renderWindow =
| |
| vtkSmartPointer<vtkRenderWindow>::New();
| |
| renderWindow->SetSize(600,300);
| |
| | |
| vtkSmartPointer<vtkRenderer> leftRenderer =
| |
| vtkSmartPointer<vtkRenderer>::New();
| |
| renderWindow->AddRenderer(leftRenderer);
| |
| leftRenderer->SetViewport(leftViewport);
| |
| | |
| vtkSmartPointer<vtkRenderer> rightRenderer =
| |
| vtkSmartPointer<vtkRenderer>::New();
| |
| renderWindow->AddRenderer(rightRenderer);
| |
| rightRenderer->SetViewport(rightViewport);
| |
| | |
| leftRenderer->AddActor(originalActor);
| |
| rightRenderer->AddActor(convolvedActor);
| |
| | |
| vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
| |
| vtkSmartPointer<vtkRenderWindowInteractor>::New();
| |
| vtkSmartPointer<vtkInteractorStyleImage> style =
| |
| vtkSmartPointer<vtkInteractorStyleImage>::New();
| |
| | |
| renderWindowInteractor->SetInteractorStyle(style);
| |
| | |
| renderWindowInteractor->SetRenderWindow(renderWindow);
| |
| renderWindowInteractor->Initialize();
| |
| | |
| renderWindowInteractor->Start();
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| void CreateKernel(ImageType::Pointer kernel)
| |
| {
| |
| ImageType::IndexType start;
| |
| start.Fill(0);
| |
| | |
| ImageType::SizeType size;
| |
| size.Fill(3);
| |
| | |
| ImageType::RegionType region;
| |
| region.SetSize(size);
| |
| region.SetIndex(start);
| |
| | |
| kernel->SetRegions(region);
| |
| kernel->Allocate();
| |
|
| |
| itk::ImageRegionIterator<ImageType> imageIterator(kernel, region);
| |
| | |
| while(!imageIterator.IsAtEnd())
| |
| {
| |
| //imageIterator.Set(255);
| |
| imageIterator.Set(1);
| |
| | |
| ++imageIterator;
| |
| }
| |
| }
| |
| </source>
| |
| | |
| ==CMakeLists.txt==
| |
| <source lang="cmake">
| |
| cmake_minimum_required(VERSION 2.6)
| |
| | |
| PROJECT(ConvolutionImageFilter)
| |
| | |
| include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)
| |
| | |
| FIND_PACKAGE(VTK REQUIRED)
| |
| INCLUDE(${VTK_USE_FILE})
| |
| | |
| FIND_PACKAGE(ITK REQUIRED)
| |
| INCLUDE(${ITK_USE_FILE})
| |
| | |
| ADD_EXECUTABLE(ConvolutionImageFilter ConvolutionImageFilter.cxx)
| |
| TARGET_LINK_LIBRARIES(ConvolutionImageFilter
| |
| vtkHybrid
| |
| ITKBasicFilters ITKIO ITKCommon)
| |
| | |
| </source>
| |
