ITK  5.3.0
Insight Toolkit
Examples/DataRepresentation/Mesh/ImageToPointSet.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.
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*=========================================================================*/
// Software Guide : BeginLatex
//
// This example illustrates how to convert an ITK Image into a PointSet.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
#include "itkImage.h"
#include "itkPointSet.h"
int
main(int argc, char * argv[])
{
// Verify the number of parameters in the command line
if (argc < 2)
{
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0] << " inputImageFile " << std::endl;
return EXIT_FAILURE;
}
using PixelType = unsigned char;
constexpr unsigned int Dimension = 2;
using ReaderType = itk::ImageFileReader<ImageType>;
ReaderType::Pointer reader = ReaderType::New();
const char * inputFilename = argv[1];
reader->SetFileName(inputFilename);
try
{
reader->Update();
}
catch (const itk::ExceptionObject & err)
{
std::cout << "ExceptionObject caught !" << std::endl;
std::cout << err << std::endl;
return EXIT_FAILURE;
}
PointSetType::Pointer pointSet = PointSetType::New();
const ImageType * image = reader->GetOutput();
IteratorType it(image, image->GetBufferedRegion());
it.GoToBegin();
PointType point;
unsigned long pointId = 0;
while (!it.IsAtEnd())
{
// Convert the pixel position into a Point
image->TransformIndexToPhysicalPoint(it.GetIndex(), point);
pointSet->SetPoint(pointId, point);
// Transfer the pixel data to the value associated with the point.
pointSet->SetPointData(pointId, it.Get());
++it;
++pointId;
}
std::cout << "Number Of Points = ";
std::cout << pointSet->GetNumberOfPoints() << std::endl;
// Software Guide : EndCodeSnippet
return EXIT_SUCCESS;
}
itk::ImageRegionConstIterator::GoToBegin
void GoToBegin()
Definition: itkImageRegionConstIterator.h:196
itk::PointSet
A superclass of the N-dimensional mesh structure; supports point (geometric coordinate and attribute)...
Definition: itkPointSet.h:82
itk::GTest::TypedefsAndConstructors::Dimension2::PointType
ImageBaseType::PointType PointType
Definition: itkGTestTypedefsAndConstructors.h:51
itkImageFileReader.h
itkImage.h
itkImageRegionConstIterator.h
itk::ImageFileReader
Data source that reads image data from a single file.
Definition: itkImageFileReader.h:75
itkImageFileWriter.h
itk::ImageRegionConstIterator< ImageType >
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:86
itkPointSet.h
itk::GTest::TypedefsAndConstructors::Dimension2::Dimension
constexpr unsigned int Dimension
Definition: itkGTestTypedefsAndConstructors.h:44