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| ==WarpImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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 "itkImageFileReader.h"
| |
| #include "itkImageFileWriter.h"
| |
| #include "itkImage.h"
| |
| #include "itkVector.h"
| |
| #include "itkDeformationFieldSource.h"
| |
| #include "itkDeformationFieldTransform.h"
| |
| #include "itkWarpImageFilter.h"
| |
|
| |
|
| const unsigned int Dimension = 2;
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| typedef unsigned char PixelType;
| |
| typedef itk::Image< PixelType, Dimension > ImageType;
| |
| | |
| static void CreateFixedImage(ImageType::Pointer image);
| |
| static void CreateMovingImage(ImageType::Pointer image);
| |
|
| |
| int main(int argc, char * argv[])
| |
| {
| |
| typedef float VectorComponentType;
| |
| | |
| typedef itk::Vector< VectorComponentType, Dimension > VectorType;
| |
| typedef itk::Image< VectorType, Dimension > DeformationFieldType;
| |
| | |
| ImageType::Pointer fixedImage = ImageType::New();
| |
| CreateFixedImage(fixedImage);
| |
|
| |
| ImageType::Pointer movingImage = ImageType::New();
| |
| CreateMovingImage(movingImage);
| |
|
| |
| typedef itk::DeformationFieldSource<DeformationFieldType> DeformationFieldSourceType;
| |
| DeformationFieldSourceType::Pointer deformationFieldSource = DeformationFieldSourceType::New();
| |
| deformationFieldSource->SetOutputSpacing( fixedImage->GetSpacing() );
| |
| deformationFieldSource->SetOutputOrigin( fixedImage->GetOrigin() );
| |
| deformationFieldSource->SetOutputRegion( fixedImage->GetLargestPossibleRegion() );
| |
| deformationFieldSource->SetOutputDirection( fixedImage->GetDirection() );
| |
| | |
| // Create source and target landmarks.
| |
| typedef DeformationFieldSourceType::LandmarkContainerPointer LandmarkContainerPointer;
| |
| typedef DeformationFieldSourceType::LandmarkContainer LandmarkContainerType;
| |
| typedef DeformationFieldSourceType::LandmarkPointType LandmarkPointType;
| |
| | |
| LandmarkContainerType::Pointer sourceLandmarks = LandmarkContainerType::New();
| |
| LandmarkContainerType::Pointer targetLandmarks = LandmarkContainerType::New();
| |
| | |
| LandmarkPointType sourcePoint;
| |
| LandmarkPointType targetPoint;
| |
| | |
| sourcePoint[0] = 40;
| |
| sourcePoint[1] = 40;
| |
| targetPoint[0] = 20;
| |
| targetPoint[1] = 20;
| |
| sourceLandmarks->InsertElement( 0, sourcePoint );
| |
| targetLandmarks->InsertElement( 0, targetPoint );
| |
| | |
| sourcePoint[0] = 40;
| |
| sourcePoint[1] = 60;
| |
| targetPoint[0] = 20;
| |
| targetPoint[1] = 80;
| |
| sourceLandmarks->InsertElement( 1, sourcePoint );
| |
| targetLandmarks->InsertElement( 1, targetPoint );
| |
| | |
| sourcePoint[0] = 60;
| |
| sourcePoint[1] = 40;
| |
| targetPoint[0] = 80;
| |
| targetPoint[1] = 20;
| |
| sourceLandmarks->InsertElement( 2, sourcePoint );
| |
| targetLandmarks->InsertElement( 2, targetPoint );
| |
| | |
| sourcePoint[0] = 60;
| |
| sourcePoint[1] = 60;
| |
| targetPoint[0] = 80;
| |
| targetPoint[1] = 80;
| |
| sourceLandmarks->InsertElement( 3, sourcePoint );
| |
| targetLandmarks->InsertElement( 3, targetPoint );
| |
| | |
| deformationFieldSource->SetSourceLandmarks( sourceLandmarks.GetPointer() );
| |
| deformationFieldSource->SetTargetLandmarks( targetLandmarks.GetPointer() );
| |
| deformationFieldSource->UpdateLargestPossibleRegion();
| |
| | |
| // Write the deformation field
| |
| {
| |
| typedef itk::ImageFileWriter< DeformationFieldType > WriterType;
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetInput ( deformationFieldSource->GetOutput() );
| |
| writer->SetFileName( "deformation.mhd" );
| |
| writer->Update();
| |
| }
| |
|
| |
| | |
| typedef itk::WarpImageFilter< ImageType,
| |
| ImageType,
| |
| DeformationFieldType > WarpImageFilterType;
| |
| | |
| WarpImageFilterType::Pointer warpImageFilter = WarpImageFilterType::New();
| |
| | |
| typedef itk::LinearInterpolateImageFunction<ImageType, double > InterpolatorType;
| |
| | |
| InterpolatorType::Pointer interpolator = InterpolatorType::New();
| |
| warpImageFilter->SetInterpolator( interpolator );
| |
| warpImageFilter->SetOutputSpacing( deformationFieldSource->GetOutput()->GetSpacing() );
| |
| warpImageFilter->SetOutputOrigin( deformationFieldSource->GetOutput()->GetOrigin() );
| |
| warpImageFilter->SetDeformationField( deformationFieldSource->GetOutput() );
| |
| warpImageFilter->SetInput( movingImage );
| |
| warpImageFilter->Update();
| |
| | |
| // Write the output
| |
| typedef itk::ImageFileWriter< ImageType > WriterType;
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetInput ( warpImageFilter->GetOutput() );
| |
| writer->SetFileName( "output.png" );
| |
| writer->Update();
| |
|
| |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| void CreateFixedImage(ImageType::Pointer image)
| |
| {
| |
| // Create a black image with a white square
| |
| ImageType::IndexType start;
| |
| start.Fill(0);
| |
|
| |
| ImageType::SizeType size;
| |
| size.Fill(100);
| |
|
| |
| ImageType::RegionType region;
| |
| region.SetSize(size);
| |
| region.SetIndex(start);
| |
|
| |
| image->SetRegions(region);
| |
| image->Allocate();
| |
| image->FillBuffer(0);
| |
|
| |
| itk::ImageRegionIterator<ImageType> imageIterator(image,region);
| |
|
| |
| while(!imageIterator.IsAtEnd())
| |
| {
| |
| if(imageIterator.GetIndex()[0] > 40 && imageIterator.GetIndex()[0] < 60 &&
| |
| imageIterator.GetIndex()[1] > 40 && imageIterator.GetIndex()[1] < 60)
| |
| {
| |
| imageIterator.Set(255);
| |
| }
| |
| ++imageIterator;
| |
| }
| |
| | |
| // Write the deformation field
| |
| typedef itk::ImageFileWriter< ImageType > WriterType;
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetInput ( image );
| |
| writer->SetFileName( "fixed.png" );
| |
| writer->Update();
| |
| }
| |
| | |
| | |
| void CreateMovingImage(ImageType::Pointer image)
| |
| {
| |
| // Create a black image with a white square
| |
| ImageType::IndexType start;
| |
| start.Fill(0);
| |
|
| |
| ImageType::SizeType size;
| |
| size.Fill(100);
| |
|
| |
| ImageType::RegionType region;
| |
| region.SetSize(size);
| |
| region.SetIndex(start);
| |
|
| |
| image->SetRegions(region);
| |
| image->Allocate();
| |
| image->FillBuffer(0);
| |
|
| |
| itk::ImageRegionIterator<ImageType> imageIterator(image,region);
| |
|
| |
| while(!imageIterator.IsAtEnd())
| |
| {
| |
| if(imageIterator.GetIndex()[0] > 20 && imageIterator.GetIndex()[0] < 80 &&
| |
| imageIterator.GetIndex()[1] > 20 && imageIterator.GetIndex()[1] < 80)
| |
| {
| |
| imageIterator.Set(100);
| |
| }
| |
| ++imageIterator;
| |
| }
| |
| | |
| // Write the deformation field
| |
| typedef itk::ImageFileWriter< ImageType > WriterType;
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetInput ( image );
| |
| writer->SetFileName( "moving.png" );
| |
| writer->Update();
| |
| }
| |
| | |
| </source>
| |
| | |
| {{ITKCMakeLists|WarpImageFilter|}}
| |
