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| ==ContourExtractor2DImageFilter.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| | {{warning|1=The media wiki content on this page is no longer maintained.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 "itkContourExtractor2DImageFilter.h"
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| #include "itkApproximateSignedDistanceMapImageFilter.h"
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| | |
| typedef itk::Image<unsigned char, 2> UnsignedCharImageType;
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| typedef itk::Image<float, 2> FloatImageType;
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|
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| static void CreateImage(UnsignedCharImageType::Pointer image);
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|
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| int main(int, char *[])
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| { | |
| UnsignedCharImageType::Pointer image = UnsignedCharImageType::New();
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| CreateImage(image);
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|
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| typedef itk::ApproximateSignedDistanceMapImageFilter< UnsignedCharImageType, FloatImageType > ApproximateSignedDistanceMapImageFilterType;
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| ApproximateSignedDistanceMapImageFilterType::Pointer approximateSignedDistanceMapImageFilter = ApproximateSignedDistanceMapImageFilterType::New();
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| approximateSignedDistanceMapImageFilter->SetInput(image);
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| approximateSignedDistanceMapImageFilter->SetInsideValue(255);
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| approximateSignedDistanceMapImageFilter->SetOutsideValue(0);
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| approximateSignedDistanceMapImageFilter->Update();
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|
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| typedef itk::ContourExtractor2DImageFilter <FloatImageType>
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| ContourExtractor2DImageFilterType;
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| ContourExtractor2DImageFilterType::Pointer contourExtractor2DImageFilter
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| = ContourExtractor2DImageFilterType::New();
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| contourExtractor2DImageFilter->SetInput(approximateSignedDistanceMapImageFilter->GetOutput());
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| contourExtractor2DImageFilter->SetContourValue(0);
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| contourExtractor2DImageFilter->Update();
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|
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| std::cout << "There are " << contourExtractor2DImageFilter->GetNumberOfOutputs() << " contours" << std::endl;
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|
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| ContourExtractor2DImageFilterType::VertexListType::ConstIterator vertexIterator = contourExtractor2DImageFilter->GetOutput()->GetVertexList()->Begin();
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|
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| for(unsigned int i = 0; i < contourExtractor2DImageFilter->GetNumberOfOutputs(); ++i)
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| {
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| std::cout << "Contour " << i << ": " << std::endl;
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| while(vertexIterator != contourExtractor2DImageFilter->GetOutput(i)->GetVertexList()->End())
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| {
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| std::cout << vertexIterator->Value() << std::endl;
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| ++vertexIterator;
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| }
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| std::cout << std::endl;
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| }
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| return EXIT_SUCCESS;
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| }
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| | |
| void CreateImage(UnsignedCharImageType::Pointer image)
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| {
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| // Create an image
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| itk::Index<2> start;
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| start.Fill(0);
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| itk::Size<2> size;
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| size.Fill(100);
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|
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| itk::ImageRegion<2> region(start, size);
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| image->SetRegions(region);
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| image->Allocate();
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| image->FillBuffer(0);
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|
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| // Create a line of white pixels
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| for(unsigned int i = 40; i < 60; ++i) | |
| {
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| itk::Index<2> pixel;
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| pixel.Fill(i);
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| image->SetPixel(pixel, 255);
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| }
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|
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| // Create another line of pixels
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| for(unsigned int i = 10; i < 20; ++i)
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| {
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| itk::Index<2> pixel;
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| pixel[0] = 10;
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| pixel[1] = i;
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| image->SetPixel(pixel, 255);
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| }
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|
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| typedef itk::ImageFileWriter< UnsignedCharImageType > 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|ContourExtractor2DImageFilter}}
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