ITK  5.0.0
Insight Segmentation and Registration Toolkit
WikiExamples/ImageProcessing/BinaryStatisticsOpeningImageFilter.cxx
using ImageType = itk::Image<unsigned char, 2>;
void CreateImage(ImageType::Pointer image1, ImageType::Pointer image2);
int main(int, char*[])
{
ImageType::Pointer binaryImage = ImageType::New();
ImageType::Pointer featureImage = ImageType::New();
CreateImage(binaryImage, featureImage);
BinaryOpeningType::Pointer opening = BinaryOpeningType::New();
opening->SetInput(binaryImage);
opening->SetFeatureImage(featureImage);
opening->SetBackgroundValue(0);
opening->SetForegroundValue(255);
opening->SetLambda(150);
opening->SetAttribute( BinaryOpeningType::LabelObjectType::MEAN);
opening->Update();
using WriterType = itk::ImageFileWriter<ImageType>;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("input.mhd");
writer->SetInput(featureImage);
writer->Update();
writer->SetFileName("output.mhd");
writer->SetInput(opening->GetOutput());
writer->Update();
return EXIT_SUCCESS;
}
void CreateImage(ImageType::Pointer image1, ImageType::Pointer image2)
{
// Create an image with 2 connected components
start[0] = 0;
start[1] = 0;
size[0] = 200;
size[1] = 200;
region.SetSize(size);
region.SetIndex(start);
image1->SetRegions(region);
image1->Allocate();
image1->FillBuffer(0);
image2->SetRegions(region);
image2->Allocate();
image2->FillBuffer(0);
// Make a square
for(unsigned int r = 20; r < 80; r++)
{
for(unsigned int c = 30; c < 100; c++)
{
pixelIndex[0] = r;
pixelIndex[1] = c;
image1->SetPixel(pixelIndex, 255);
image2->SetPixel(pixelIndex, 100);
}
}
// Make another square
for(unsigned int r = 100; r < 130; r++)
{
for(unsigned int c = 115; c < 160; c++)
{
pixelIndex[0] = r;
pixelIndex[1] = c;
image1->SetPixel(pixelIndex, 255);
image2->SetPixel(pixelIndex, 200);
}
}
}