ITK  5.0.0
Insight Segmentation and Registration Toolkit
WikiExamples/Segmentation/LabelMapContourOverlayImageFilter.cxx
#include "itkImage.h"
#include "itkRGBPixel.h"
namespace
{
using ImageType = itk::Image<unsigned char, 2>;
}
static void CreateImage(ImageType::Pointer image);
int main(int, char *[])
{
ImageType::Pointer image = ImageType::New();
CreateImage(image);
using BinaryImageToLabelMapFilterType = itk::BinaryImageToLabelMapFilter<ImageType>;
BinaryImageToLabelMapFilterType::Pointer binaryImageToLabelMapFilter = BinaryImageToLabelMapFilterType::New();
binaryImageToLabelMapFilter->SetInput(image);
binaryImageToLabelMapFilter->Update();
using RGBPixelType = itk::RGBPixel<unsigned char>;
using RGBImageType = itk::Image<RGBPixelType>;
LabelMapContourOverlayImageFilterType::Pointer labelMapContourOverlayImageFilter = LabelMapContourOverlayImageFilterType::New();
labelMapContourOverlayImageFilter->SetInput(binaryImageToLabelMapFilter->GetOutput());
labelMapContourOverlayImageFilter->SetFeatureImage(image);
labelMapContourOverlayImageFilter->SetOpacity(.5);
labelMapContourOverlayImageFilter->Update();
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("output.png");
writer->SetInput(labelMapContourOverlayImageFilter->GetOutput());
writer->Update();
return EXIT_SUCCESS;
}
void CreateImage(ImageType::Pointer image)
{
// Create a black image with a white square
start.Fill(0);
size.Fill(100);
region.SetSize(size);
region.SetIndex(start);
image->SetRegions(region);
image->Allocate();
image->FillBuffer(0);
itk::ImageRegionIterator<ImageType> imageIterator(image,image->GetLargestPossibleRegion());
// Make two squares
while(!imageIterator.IsAtEnd())
{
if((imageIterator.GetIndex()[0] > 5 && imageIterator.GetIndex()[0] < 20) &&
(imageIterator.GetIndex()[1] > 5 && imageIterator.GetIndex()[1] < 20) )
{
imageIterator.Set(255);
}
if((imageIterator.GetIndex()[0] > 50 && imageIterator.GetIndex()[0] < 70) &&
(imageIterator.GetIndex()[1] > 50 && imageIterator.GetIndex()[1] < 70) )
{
imageIterator.Set(255);
}
++imageIterator;
}
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("image.png");
writer->SetInput(image);
writer->Update();
}