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| | {{warning|1=The media wiki content on this page is no longer maintained.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