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| Output is all black?
| | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| | | }} |
| ==NormalizedCorrelationImageFilter.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 <itkNormalizedCorrelationImageFilter.h>
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| #include <itkRegionOfInterestImageFilter.h>
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| #include <itkImageKernelOperator.h>
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| #include <itkCastImageFilter.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"
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| | |
| #include <iostream>
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| #include <string>
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| | |
| int main(int argc, char *argv[])
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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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| }
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| | |
| std::string filename = argv[1];
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| | |
| typedef itk::Image<unsigned char, 2> UnsignedCharImageType;
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| typedef itk::Image<float, 2> FloatImageType;
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| typedef itk::ImageFileReader<FloatImageType> ReaderType;
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| typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
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| | |
| // Read the image
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| ReaderType::Pointer reader = ReaderType::New();
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| reader->SetFileName(filename.c_str());
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| | |
| // Setup the original image actor
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| typedef itk::CastImageFilter< FloatImageType,
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| UnsignedCharImageType > CastFilterType;
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| CastFilterType::Pointer originalCastFilter = CastFilterType::New();
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| originalCastFilter->SetInput(reader->GetOutput());
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|
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| ConnectorType::Pointer originalConnector = ConnectorType::New();
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| originalConnector->SetInput(originalCastFilter->GetOutput());
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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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| | |
| // Extract a small region
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| typedef itk::RegionOfInterestImageFilter< FloatImageType,
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| FloatImageType > ExtractFilterType;
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| | |
| ExtractFilterType::Pointer extractFilter = ExtractFilterType::New();
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| | |
| UnsignedCharImageType::IndexType start;
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| start[0] = 50;
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| start[1] = 50;
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| | |
| UnsignedCharImageType::SizeType size;
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| size[0] = 100;
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| size[1] = 100;
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| | |
| UnsignedCharImageType::RegionType desiredRegion;
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| desiredRegion.SetSize(size);
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| desiredRegion.SetIndex(start);
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| | |
| extractFilter->SetRegionOfInterest(desiredRegion);
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| extractFilter->SetInput(reader->GetOutput());
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| | |
| // Display extracted region (kernel)
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| CastFilterType::Pointer kernelCastFilter = CastFilterType::New();
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| kernelCastFilter->SetInput(extractFilter->GetOutput());
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|
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| ConnectorType::Pointer extractedConnector = ConnectorType::New();
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| extractedConnector->SetInput(kernelCastFilter->GetOutput());
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| | |
| vtkSmartPointer<vtkImageActor> extractedActor =
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| vtkSmartPointer<vtkImageActor>::New();
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| extractedActor->SetInput(extractedConnector->GetOutput());
| |
| | |
| // Perform normalized correlation
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| // <input type, mask type (not used), output type>
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| typedef itk::NormalizedCorrelationImageFilter<FloatImageType, FloatImageType, FloatImageType> CorrelationFilterType;
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| | |
| itk::ImageKernelOperator<float> kernelOperator;
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| kernelOperator.SetImageKernel(extractFilter->GetOutput());
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|
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| CorrelationFilterType::Pointer correlationFilter = CorrelationFilterType::New();
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| correlationFilter->SetInput(reader->GetOutput());
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| correlationFilter->SetTemplate(kernelOperator);
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| | |
| // Display the correlation image
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| typedef itk::RescaleIntensityImageFilter< FloatImageType, UnsignedCharImageType > RescaleFilterType;
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| RescaleFilterType::Pointer rescaleFilter = RescaleFilterType::New();
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| rescaleFilter->SetInput(correlationFilter->GetOutput());
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| rescaleFilter->SetOutputMinimum(0);
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| rescaleFilter->SetOutputMaximum(255);
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| | |
| ConnectorType::Pointer correlationConnector = ConnectorType::New();
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| correlationConnector->SetInput(rescaleFilter->GetOutput());
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| | |
| vtkSmartPointer<vtkImageActor> correlationActor =
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| vtkSmartPointer<vtkImageActor>::New();
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| correlationActor->SetInput(correlationConnector->GetOutput());
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| | |
| // Visualize
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| vtkSmartPointer<vtkRenderWindow> renderWindow =
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| vtkSmartPointer<vtkRenderWindow>::New();
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| renderWindow->SetSize(900, 300);
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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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| | |
| double leftViewport[4] = {0.0, 0.0, 0.33, 1.0};
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| double centerViewport[4] = {0.33, 0.0, 0.66, 1.0}; | |
| double rightViewport[4] = {0.66, 0.0, 1.0, 1.0};
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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> centerRenderer =
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| vtkSmartPointer<vtkRenderer>::New();
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| renderWindow->AddRenderer(centerRenderer);
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| centerRenderer->SetViewport(centerViewport);
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| centerRenderer->SetBackground(.5, .5, .6);
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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);
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| | |
| leftRenderer->AddActor(originalActor);
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| centerRenderer->AddActor(extractedActor);
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| rightRenderer->AddActor(correlationActor);
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| | |
| leftRenderer->ResetCamera();
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| rightRenderer->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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| | |
| ==CMakeLists.txt==
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| <source lang="cmake">
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| cmake_minimum_required(VERSION 2.6)
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| | |
| PROJECT(NormalizedCorrelationImageFilter)
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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(NormalizedCorrelationImageFilter NormalizedCorrelationImageFilter.cpp)
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| TARGET_LINK_LIBRARIES(NormalizedCorrelationImageFilter
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| vtkHybrid
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| ITKBasicFilters ITKCommon ITKIO)
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| | |
| </source>
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