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| ==LabelStatisticsImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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"
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| #include "itkImageRegionIterator.h"
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| #include "itkBinaryImageToLabelMapFilter.h"
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| #include "itkLabelMapToLabelImageFilter.h"
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| #include "itkLabelStatisticsImageFilter.h"
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| | |
| typedef itk::Image<unsigned char, 2> ImageType;
| |
| static void CreateImage(ImageType::Pointer image);
| |
| | |
| 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::BinaryImageToLabelMapFilter<ImageType> BinaryImageToLabelMapFilterType;
| |
| BinaryImageToLabelMapFilterType::Pointer binaryImageToLabelMapFilter = BinaryImageToLabelMapFilterType::New();
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| binaryImageToLabelMapFilter->SetInput(image);
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| binaryImageToLabelMapFilter->Update();
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| | |
| typedef itk::LabelMapToLabelImageFilter<BinaryImageToLabelMapFilterType::OutputImageType, ImageType> LabelMapToLabelImageFilterType;
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| LabelMapToLabelImageFilterType::Pointer labelMapToLabelImageFilter = LabelMapToLabelImageFilterType::New();
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| labelMapToLabelImageFilter->SetInput(binaryImageToLabelMapFilter->GetOutput());
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| labelMapToLabelImageFilter->Update();
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| | |
| typedef itk::LabelStatisticsImageFilter< ImageType, ImageType > LabelStatisticsImageFilterType;
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| LabelStatisticsImageFilterType::Pointer labelStatisticsImageFilter = LabelStatisticsImageFilterType::New();
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| labelStatisticsImageFilter->SetLabelInput( labelMapToLabelImageFilter->GetOutput() );
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| labelStatisticsImageFilter->SetInput(image);
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| labelStatisticsImageFilter->Update();
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|
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| std::cout << "Number of labels: " << labelStatisticsImageFilter->GetNumberOfLabels() << std::endl;
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| std::cout << std::endl;
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|
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| typedef LabelStatisticsImageFilterType::ValidLabelValuesContainerType ValidLabelValuesType;
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| typedef LabelStatisticsImageFilterType::LabelPixelType LabelPixelType;
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| | |
| for(ValidLabelValuesType::const_iterator vIt=labelStatisticsImageFilter->GetValidLabelValues().begin();
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| vIt != labelStatisticsImageFilter->GetValidLabelValues().end();
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| ++vIt)
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| {
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| if ( labelStatisticsImageFilter->HasLabel(*vIt) )
| |
| {
| |
| LabelPixelType labelValue = *vIt;
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| std::cout << "min: " << labelStatisticsImageFilter->GetMinimum( labelValue ) << std::endl;
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| std::cout << "max: " << labelStatisticsImageFilter->GetMaximum( labelValue ) << std::endl;
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| std::cout << "median: " << labelStatisticsImageFilter->GetMedian( labelValue ) << std::endl;
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| std::cout << "mean: " << labelStatisticsImageFilter->GetMean( labelValue ) << std::endl;
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| std::cout << "sigma: " << labelStatisticsImageFilter->GetSigma( labelValue ) << std::endl;
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| std::cout << "variance: " << labelStatisticsImageFilter->GetVariance( labelValue ) << std::endl;
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| std::cout << "sum: " << labelStatisticsImageFilter->GetSum( labelValue ) << std::endl;
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| std::cout << "count: " << labelStatisticsImageFilter->GetCount( labelValue ) << std::endl;
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| //std::cout << "box: " << labelStatisticsImageFilter->GetBoundingBox( labelValue ) << std::endl; // can't output a box
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| std::cout << "region: " << labelStatisticsImageFilter->GetRegion( labelValue ) << std::endl;
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| std::cout << std::endl << std::endl;
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| | |
| }
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| }
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| void CreateImage(ImageType::Pointer image)
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| {
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| // Create a black image with a white square
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| ImageType::IndexType start;
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| start.Fill(0);
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| | |
| ImageType::SizeType size;
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| size.Fill(20);
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| | |
| ImageType::RegionType region;
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| region.SetSize(size);
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| region.SetIndex(start); | |
| image->SetRegions(region);
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| image->Allocate();
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| | |
| itk::ImageRegionIterator<ImageType> imageIterator(image,image->GetLargestPossibleRegion());
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| | |
| // Make a square
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| while(!imageIterator.IsAtEnd())
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| {
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| if((imageIterator.GetIndex()[0] > 5 && imageIterator.GetIndex()[0] < 10) &&
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| (imageIterator.GetIndex()[1] > 5 && imageIterator.GetIndex()[1] < 10) )
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| {
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| imageIterator.Set(255);
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| }
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| else
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| {
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| imageIterator.Set(0);
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| }
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| | |
| ++imageIterator;
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| }
| |
| | |
| typedef itk::ImageFileWriter< ImageType > WriterType;
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| WriterType::Pointer writer = WriterType::New();
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| writer->SetFileName("image.png");
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| writer->SetInput(image);
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| writer->Update();
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| }
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| | |
| </source>
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| | |
| {{ITKCMakeLists|LabelStatisticsImageFilter}}
| |
