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| ==LabelImageToLabelMapFilter.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| | {{warning|1=The media wiki content on this page is no longer maintained.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">
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| #include "itkImage.h"
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| #include "itkImageFileWriter.h"
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| #include "itkLabelImageToLabelMapFilter.h"
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| #include "itkConnectedComponentImageFilter.h"
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| | |
| typedef itk::Image<unsigned char, 2> ImageType;
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| | |
| static void CreateImage(ImageType::Pointer image);
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| | |
| int main(int, char *[])
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| { | |
| ImageType::Pointer image = ImageType::New();
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| CreateImage(image);
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| | |
| typedef itk::ConnectedComponentImageFilter <ImageType, ImageType >
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| ConnectedComponentImageFilterType;
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| ConnectedComponentImageFilterType::Pointer connectedComponentImageFilter
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| = ConnectedComponentImageFilterType::New ();
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| connectedComponentImageFilter->SetInput(image);
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| connectedComponentImageFilter->Update();
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| | |
| typedef itk::LabelImageToLabelMapFilter <ImageType>
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| LabelImageToLabelMapFilterType;
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| LabelImageToLabelMapFilterType::Pointer labelImageToLabelMapFilter
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| = LabelImageToLabelMapFilterType::New ();
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| labelImageToLabelMapFilter->SetInput(connectedComponentImageFilter->GetOutput());
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| labelImageToLabelMapFilter->Update();
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| | |
| // The output of this filter is an itk::LabelMap, which contains itk::LabelObject's
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| std::cout << "There are " << labelImageToLabelMapFilter->GetOutput()->GetNumberOfLabelObjects() << " objects." << std::endl;
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| return EXIT_SUCCESS;
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| }
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| | |
| void CreateImage(ImageType::Pointer image)
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| {
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| // Create an image with 2 connected components
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| ImageType::RegionType region;
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| ImageType::IndexType start;
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| start[0] = 0;
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| start[1] = 0;
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| ImageType::SizeType size;
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| unsigned int NumRows = 200;
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| unsigned int NumCols = 300;
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| size[0] = NumRows;
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| size[1] = NumCols;
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| region.SetSize(size);
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| region.SetIndex(start);
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| image->SetRegions(region);
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| image->Allocate();
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| | |
| // Make a square
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| for(unsigned int r = 20; r < 80; r++) | |
| {
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| for(unsigned int c = 30; c < 100; c++)
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| {
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| ImageType::IndexType pixelIndex;
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| pixelIndex[0] = r;
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| pixelIndex[1] = c;
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| image->SetPixel(pixelIndex, 255);
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| }
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| }
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| // Make another square
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| for(unsigned int r = 100; r < 130; r++)
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| {
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| for(unsigned int c = 115; c < 160; c++)
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| {
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| ImageType::IndexType pixelIndex;
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| pixelIndex[0] = r;
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| pixelIndex[1] = c;
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| image->SetPixel(pixelIndex, 255);
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| }
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| }
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| }
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| | |
| </source>
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| {{ITKCMakeLists|{{SUBPAGENAME}}}}
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