SphinxExamples/src/Numerics/Statistics/CreateListOfSamplesFromImageWithoutDuplication/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
 *
 *         https://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 "itkImageToListSampleAdaptor.h"
#include "itkImage.h"
#include "itkRandomImageSource.h"
#include "itkComposeImageFilter.h"
 
int
main()
{
  using FloatImage2DType = itk::Image<float, 2>;
 
  itk::RandomImageSource<FloatImage2DType>::Pointer random;
  random = itk::RandomImageSource<FloatImage2DType>::New();
 
  random->SetMin(0.0);
  random->SetMax(1000.0);
 
  using SpacingValueType = FloatImage2DType::SpacingValueType;
  using SizeValueType = FloatImage2DType::SizeValueType;
  using PointValueType = FloatImage2DType::PointValueType;
 
  SizeValueType size[2] = { 20, 20 };
  random->SetSize(size);
 
  SpacingValueType spacing[2] = { 0.7, 2.1 };
  random->SetSpacing(spacing);
 
  PointValueType origin[2] = { 15, 400 };
  random->SetOrigin(origin);
 
  using MeasurementVectorType = itk::FixedArray<float, 1>;
  using ArrayImageType = itk::Image<MeasurementVectorType, 2>;
  using CasterType = itk::ComposeImageFilter<FloatImage2DType, ArrayImageType>;
 
  auto caster = CasterType::New();
  caster->SetInput(random->GetOutput());
  caster->Update();
 
  using SampleType = itk::Statistics::ImageToListSampleAdaptor<ArrayImageType>;
  auto sample = SampleType::New();
 
  sample->SetImage(caster->GetOutput());
 
  SampleType::Iterator iter = sample->Begin();
 
  while (iter != sample->End())
  {
    std::cout << iter.GetMeasurementVector() << std::endl;
    ++iter;
  }
 
  return EXIT_SUCCESS;
}