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| ==BinaryImageToLabelMapFilter.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| | {{warning|1=The media wiki content on this page is no longer maintained.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 "itkBinaryImageToLabelMapFilter.h"
| |
| | |
| typedef itk::Image<unsigned char, 2> ImageType;
| |
| static void CreateImage(ImageType::Pointer image);
| |
| | |
| int main(int, char *[])
| |
| { | |
| ImageType::Pointer image = ImageType::New();
| |
| CreateImage(image);
| |
| | |
| typedef itk::BinaryImageToLabelMapFilter<ImageType> BinaryImageToLabelMapFilterType;
| |
| BinaryImageToLabelMapFilterType::Pointer binaryImageToLabelMapFilter = BinaryImageToLabelMapFilterType::New();
| |
| binaryImageToLabelMapFilter->SetInput(image);
| |
| binaryImageToLabelMapFilter->Update();
| |
| | |
| // The output of this filter is an itk::LabelMap, which contains itk::LabelObject's
| |
| std::cout << "There are " << binaryImageToLabelMapFilter->GetOutput()->GetNumberOfLabelObjects() << " objects." << std::endl;
| |
| | |
| // Loop over each region
| |
| for(unsigned int i = 0; i < binaryImageToLabelMapFilter->GetOutput()->GetNumberOfLabelObjects(); i++)
| |
| {
| |
| // Get the ith region
| |
| BinaryImageToLabelMapFilterType::OutputImageType::LabelObjectType* labelObject = binaryImageToLabelMapFilter->GetOutput()->GetNthLabelObject(i);
| |
| | |
| // Output the pixels composing the region
| |
| for(unsigned int pixelId = 0; pixelId < labelObject->Size(); pixelId++)
| |
| {
| |
| std::cout << "Object " << i << " contains pixel " << labelObject->GetIndex(pixelId) << std::endl;
| |
| }
| |
| }
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| void CreateImage(ImageType::Pointer image)
| |
| {
| |
| // Create a black image with a white square
| |
| ImageType::IndexType start;
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| start.Fill(0);
| |
| | |
| ImageType::SizeType size;
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| size.Fill(20);
| |
| | |
| ImageType::RegionType region;
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| region.SetSize(size);
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| 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) )
| |
| {
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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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| }
| |
| | |
| ++imageIterator;
| |
| }
| |
| | |
| typedef itk::ImageFileWriter< ImageType > WriterType;
| |
| 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();
| |
| }
| |
| | |
| </source>
| |
| | |
| {{ITKCMakeLists|BinaryImageToLabelMapFilter}}
| |
