ITK  5.2.0
Insight Toolkit
SphinxExamples/src/Filtering/LabelMap/LabelBinaryRegionsAndGetProperties/Code.cxx
/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkImage.h"
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 BinaryImageToShapeLabelMapFilterType = itk::BinaryImageToShapeLabelMapFilter<ImageType>;
BinaryImageToShapeLabelMapFilterType::Pointer binaryImageToShapeLabelMapFilter =
BinaryImageToShapeLabelMapFilterType::New();
binaryImageToShapeLabelMapFilter->SetInput(image);
binaryImageToShapeLabelMapFilter->Update();
// The output of this filter is an itk::ShapeLabelMap, which contains itk::ShapeLabelObject's
std::cout << "There are " << binaryImageToShapeLabelMapFilter->GetOutput()->GetNumberOfLabelObjects() << " objects."
<< std::endl;
// Loop over all of the blobs
for (unsigned int i = 0; i < binaryImageToShapeLabelMapFilter->GetOutput()->GetNumberOfLabelObjects(); i++)
{
BinaryImageToShapeLabelMapFilterType::OutputImageType::LabelObjectType * labelObject =
binaryImageToShapeLabelMapFilter->GetOutput()->GetNthLabelObject(i);
// Output the bounding box (an example of one possible property) of the ith region
#if ITK_VERSION_MAJOR >= 4
std::cout << "Object " << i << " has bounding box " << labelObject->GetBoundingBox() << std::endl;
#else
std::cout << "Object " << i << " has region " << labelObject->GetRegion() << std::endl;
#endif
}
return EXIT_SUCCESS;
}
void
CreateImage(ImageType::Pointer image)
{
// Create a black image with a white square
start.Fill(0);
size.Fill(20);
region.SetSize(size);
region.SetIndex(start);
image->SetRegions(region);
image->Allocate();
itk::ImageRegionIterator<ImageType> imageIterator(image, image->GetLargestPossibleRegion());
// Make a square
while (!imageIterator.IsAtEnd())
{
if ((imageIterator.GetIndex()[0] > 5 && imageIterator.GetIndex()[0] < 10) &&
(imageIterator.GetIndex()[1] > 5 && imageIterator.GetIndex()[1] < 10))
{
imageIterator.Set(255);
}
else
{
imageIterator.Set(0);
}
++imageIterator;
}
using WriterType = itk::ImageFileWriter<ImageType>;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("image.png");
writer->SetInput(image);
writer->Update();
}
itk::GTest::TypedefsAndConstructors::Dimension2::SizeType
ImageBaseType::SizeType SizeType
Definition: itkGTestTypedefsAndConstructors.h:49
itkImage.h
itkImageRegionIterator.h
itk::Index::Fill
void Fill(IndexValueType value)
Definition: itkIndex.h:270
itk::Size::Fill
void Fill(SizeValueType value)
Definition: itkSize.h:211
itk::ImageRegionIterator
A multi-dimensional iterator templated over image type that walks a region of pixels.
Definition: itkImageRegionIterator.h:80
itk::GTest::TypedefsAndConstructors::Dimension2::IndexType
ImageBaseType::IndexType IndexType
Definition: itkGTestTypedefsAndConstructors.h:50
itk::BinaryImageToShapeLabelMapFilter
Converts a binary image to a label map and valuate the shape attributes.
Definition: itkBinaryImageToShapeLabelMapFilter.h:62
itk::ImageFileWriter
Writes image data to a single file.
Definition: itkImageFileWriter.h:87
itk::GTest::TypedefsAndConstructors::Dimension2::RegionType
ImageBaseType::RegionType RegionType
Definition: itkGTestTypedefsAndConstructors.h:54
itk::ImageRegionIterator::Set
void Set(const PixelType &value) const
Definition: itkImageRegionIterator.h:116
itkBinaryImageToShapeLabelMapFilter.h
itkImageFileWriter.h
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:86
itk::ImageRegion::SetSize
void SetSize(const SizeType &size)
Definition: itkImageRegion.h:174