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| <div class="floatcenter">[[File:ITK_Examples_Baseline_ImageProcessing_TestLabelContourImageFilter.png]]</div>
| | {{warning|1=The media wiki content on this page is no longer maintained.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.}} |
| ==LabelContourImageFilter.cxx==
| |
| <source lang="cpp">
| |
| #include "itkImage.h"
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| #include "itkImageFileReader.h"
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| #include "itkLabelContourImageFilter.h"
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| #include "itkConnectedComponentImageFilter.h"
| |
| #include "itkScalarToRGBColormapImageFilter.h"
| |
| | |
| #include "itksys/SystemTools.hxx"
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| #include <sstream>
| |
| | |
| #include "QuickView.h"
| |
| | |
| typedef unsigned char PixelType;
| |
| typedef itk::RGBPixel<unsigned char> RGBPixelType;
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| typedef itk::Image<PixelType, 2> ImageType;
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| typedef itk::Image<RGBPixelType, 2> RGBImageType;
| |
| | |
| static void CreateImage(ImageType::Pointer image);
| |
| | |
| int main(int argc, char *argv[])
| |
| { | |
| // Create or read an image
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| ImageType::Pointer image;
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| if( argc < 2 )
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| {
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| image = ImageType::New();
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| CreateImage(image.GetPointer());
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| }
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| else
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| {
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| typedef itk::ImageFileReader<ImageType> ReaderType;
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| ReaderType::Pointer reader =
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| ReaderType::New();
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| reader->SetFileName(argv[1]);
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| reader->Update();
| |
| | |
| image = reader->GetOutput();
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| }
| |
| | |
| // Generate connected components
| |
| 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);
| |
| | |
| // Generate contours for each component
| |
| typedef itk::LabelContourImageFilter<ImageType, ImageType> LabelContourImageFilterType;
| |
| LabelContourImageFilterType::Pointer labelContourImageFilter =
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| LabelContourImageFilterType::New();
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| labelContourImageFilter->SetInput(connectedComponentImageFilter->GetOutput());
| |
| | |
| typedef itk::ScalarToRGBColormapImageFilter<ImageType, RGBImageType> RGBFilterType;
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| RGBFilterType::Pointer rgbFilter = RGBFilterType::New();
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| rgbFilter->SetInput( labelContourImageFilter->GetOutput() );
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| rgbFilter->SetColormap( RGBFilterType::Jet );
| |
| | |
| QuickView viewer;
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| viewer.AddImage(
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| image.GetPointer(),true,
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| argc > 1 ? itksys::SystemTools::GetFilenameName(argv[1]) : "Generated image");
| |
| | |
| std::stringstream desc;
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| desc << "LabelContourImageFilter";
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| viewer.AddRGBImage(
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| rgbFilter->GetOutput(),
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| true,
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| desc.str());
| |
| | |
| viewer.Visualize();
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| void CreateImage(ImageType::Pointer image)
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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;
| |
| | |
| 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;
| |
| | |
| region.SetSize(size);
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| region.SetIndex(start); | |
| | |
| image->SetRegions(region);
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| image->Allocate();
| |
| | |
| // Make a square
| |
| for(unsigned int r = 20; r < 80; r++)
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| {
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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;
| |
| | |
| image->SetPixel(pixelIndex, 255);
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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;
| |
| | |
| image->SetPixel(pixelIndex, 255);
| |
| }
| |
| }
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| }
| |
| </source>
| |
| | |
| {{ITKVTKCMakeLists|{{SUBPAGENAME}}}}
| |
