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| ==LabelGeometryImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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 "itkImageRegionIterator.h"
| |
| #include "itkLabelGeometryImageFilter.h"
| |
| | |
| typedef itk::Image<unsigned char, 2> ImageType;
| |
| static void CreateIntensityImage(ImageType::Pointer image);
| |
| static void CreateLabelImage(ImageType::Pointer image);
| |
| | |
| int main(int, char *[])
| |
| {
| |
| // Create a label image that is 0 in the background and where the objects are labeled
| |
| ImageType::Pointer labelImage = ImageType::New();
| |
| CreateLabelImage(labelImage);
| |
| | |
| // Create an intensity image. Some LabelGeometry features (such as weighted centroid and integrated intensity)
| |
| // depend on an intensity image.
| |
| ImageType::Pointer intensityImage = ImageType::New();
| |
| CreateIntensityImage(intensityImage);
| |
| | |
| typedef itk::LabelGeometryImageFilter< ImageType > LabelGeometryImageFilterType;
| |
| LabelGeometryImageFilterType::Pointer labelGeometryImageFilter = LabelGeometryImageFilterType::New();
| |
| labelGeometryImageFilter->SetInput( labelImage );
| |
| labelGeometryImageFilter->SetIntensityInput( intensityImage );
| |
| | |
| // These generate optional outputs.
| |
| labelGeometryImageFilter->CalculatePixelIndicesOn();
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| labelGeometryImageFilter->CalculateOrientedBoundingBoxOn();
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| labelGeometryImageFilter->CalculateOrientedLabelRegionsOn();
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|
| |
| labelGeometryImageFilter->Update();
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|
| |
| LabelGeometryImageFilterType::LabelsType allLabels = labelGeometryImageFilter->GetLabels();
| |
| LabelGeometryImageFilterType::LabelsType::iterator allLabelsIt;
| |
| std::cout << "Number of labels: " << labelGeometryImageFilter->GetNumberOfLabels() << std::endl;
| |
| std::cout << std::endl;
| |
| | |
| for( allLabelsIt = allLabels.begin(); allLabelsIt != allLabels.end(); allLabelsIt++ )
| |
| {
| |
| LabelGeometryImageFilterType::LabelPixelType labelValue = *allLabelsIt;
| |
| std::cout << "\tLabel: " << (int)labelValue << std::endl;
| |
| std::cout << "\tVolume: " << labelGeometryImageFilter->GetVolume(labelValue) << std::endl;
| |
| std::cout << "\tIntegrated Intensity: " << labelGeometryImageFilter->GetIntegratedIntensity(labelValue) << std::endl;
| |
| std::cout << "\tCentroid: " << labelGeometryImageFilter->GetCentroid(labelValue) << std::endl;
| |
| std::cout << "\tWeighted Centroid: " << labelGeometryImageFilter->GetWeightedCentroid(labelValue) << std::endl;
| |
| std::cout << "\tAxes Length: " << labelGeometryImageFilter->GetAxesLength(labelValue) << std::endl;
| |
| std::cout << "\tMajorAxisLength: " << labelGeometryImageFilter->GetMajorAxisLength(labelValue) << std::endl;
| |
| std::cout << "\tMinorAxisLength: " << labelGeometryImageFilter->GetMinorAxisLength(labelValue) << std::endl;
| |
| std::cout << "\tEccentricity: " << labelGeometryImageFilter->GetEccentricity(labelValue) << std::endl;
| |
| std::cout << "\tElongation: " << labelGeometryImageFilter->GetElongation(labelValue) << std::endl;
| |
| std::cout << "\tOrientation: " << labelGeometryImageFilter->GetOrientation(labelValue) << std::endl;
| |
| std::cout << "\tBounding box: " << labelGeometryImageFilter->GetBoundingBox(labelValue) << std::endl;
| |
|
| |
| std::cout << std::endl << std::endl;
| |
| }
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| void CreateIntensityImage(ImageType::Pointer image)
| |
| {
| |
| // Create a random image.
| |
| ImageType::IndexType start;
| |
| start.Fill(0);
| |
| | |
| ImageType::SizeType size;
| |
| size.Fill(20);
| |
| | |
| ImageType::RegionType region;
| |
| region.SetSize(size);
| |
| region.SetIndex(start);
| |
| image->SetRegions(region);
| |
| image->Allocate();
| |
| | |
| itk::ImageRegionIterator<ImageType> imageIterator(image,image->GetLargestPossibleRegion());
| |
| // Make a random image
| |
| // Create an unchanging seed.
| |
| srand(1);
| |
| while(!imageIterator.IsAtEnd())
| |
| {
| |
| int randomNumber = rand() % 255;
| |
| imageIterator.Set( randomNumber );
| |
| ++imageIterator;
| |
| }
| |
| | |
| typedef itk::ImageFileWriter< ImageType > WriterType;
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetFileName("intensityImage.png");
| |
| writer->SetInput(image);
| |
| writer->Update();
| |
| }
| |
| | |
| void CreateLabelImage(ImageType::Pointer image)
| |
| {
| |
| // Create a black image with labeled squares.
| |
| ImageType::IndexType start;
| |
| start.Fill(0);
| |
| | |
| ImageType::SizeType size; | |
| size.Fill(20);
| |
| | |
| ImageType::RegionType region;
| |
| region.SetSize(size);
| |
| region.SetIndex(start);
| |
| image->SetRegions(region);
| |
| image->Allocate();
| |
| | |
| itk::ImageRegionIterator<ImageType> imageIterator(image,image->GetLargestPossibleRegion());
| |
| | |
| // Make a square
| |
| while(!imageIterator.IsAtEnd())
| |
| {
| |
| if((imageIterator.GetIndex()[0] > 5 && imageIterator.GetIndex()[0] < 10) &&
| |
| (imageIterator.GetIndex()[1] > 5 && imageIterator.GetIndex()[1] < 10) )
| |
| {
| |
| imageIterator.Set(85);
| |
| }
| |
| else if((imageIterator.GetIndex()[0] > 11 && imageIterator.GetIndex()[0] < 17) &&
| |
| (imageIterator.GetIndex()[1] > 11 && imageIterator.GetIndex()[1] < 17) )
| |
| {
| |
| imageIterator.Set(127);
| |
| }
| |
| else if((imageIterator.GetIndex()[0] > 11 && imageIterator.GetIndex()[0] < 17) &&
| |
| (imageIterator.GetIndex()[1] > 1 && imageIterator.GetIndex()[1] < 5) )
| |
| {
| |
| imageIterator.Set(191);
| |
| }
| |
| else
| |
| {
| |
| imageIterator.Set(0);
| |
| }
| |
| | |
| ++imageIterator;
| |
| }
| |
| | |
| typedef itk::ImageFileWriter< ImageType > WriterType;
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetFileName("image.png");
| |
| writer->SetInput(image);
| |
| writer->Update();
| |
| }
| |
| | |
| </source>
| |
| | |
| {{ITKCMakeLists|{{SUBPAGENAME}}}}
| |
