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/*=========================================================================
*
* 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 "itkBSplineControlPointImageFilter.h"
#include "itkImageToImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkTestingMacros.h"
template <unsigned int ImageDimension>
int
BSpline(int argc, char * argv[])
{
using RealType = float;
using ScalarPixelType = itk::Vector<RealType, 1>;
using ScalarFieldType = itk::Image<ScalarPixelType, ImageDimension>;
using ReaderType = itk::ImageFileReader<ScalarFieldType>;
auto reader = ReaderType::New();
if (argc > 2)
{
reader->SetFileName(argv[2]);
reader->Update();
}
else
{
std::cerr << "No input image specified." << std::endl;
return EXIT_FAILURE;
}
// Reconstruction of the scalar field from the control points
typename ScalarFieldType::PointType origin;
origin.Fill(0);
typename ScalarFieldType::SizeType size;
size.Fill(100);
typename ScalarFieldType::SpacingType spacing;
spacing.Fill(1.0);
using BSplinerType = itk::BSplineControlPointImageFilter<ScalarFieldType, ScalarFieldType>;
auto bspliner = BSplinerType::New();
bspliner->SetInput(reader->GetOutput());
typename BSplinerType::ArrayType::ValueType closeDimensionVal = 0;
typename BSplinerType::ArrayType closeDimension;
closeDimension.Fill(closeDimensionVal);
bspliner->SetCloseDimension(closeDimension);
ITK_TEST_SET_GET_VALUE(closeDimension, bspliner->GetCloseDimension());
typename BSplinerType::ArrayType splineOrder(3);
bspliner->SetSplineOrder(splineOrder);
ITK_TEST_SET_GET_VALUE(splineOrder, bspliner->GetSplineOrder());
bspliner->SetSize(size);
ITK_TEST_SET_GET_VALUE(size, bspliner->GetSize());
bspliner->SetOrigin(origin);
ITK_TEST_SET_GET_VALUE(origin, bspliner->GetOrigin());
bspliner->SetSpacing(spacing);
ITK_TEST_SET_GET_VALUE(spacing, bspliner->GetSpacing());
typename BSplinerType::DirectionType direction = reader->GetOutput()->GetDirection();
bspliner->SetDirection(direction);
ITK_TEST_SET_GET_VALUE(direction, bspliner->GetDirection());
try
{
bspliner->Update();
}
catch (const itk::ExceptionObject & excep)
{
std::cerr << "Exception caught !" << std::endl;
std::cerr << excep << std::endl;
return EXIT_FAILURE;
}
using WriterType = itk::ImageFileWriter<ScalarFieldType>;
auto writer = WriterType::New();
writer->SetFileName(argv[3]);
writer->SetInput(bspliner->GetOutput());
writer->Update();
//
// Test out additional functionality by refining the control point lattice
// and seeing if the output is the same. In this example we double the
// resolution twice as the refinement is doubled at every level.
//
typename BSplinerType::ArrayType numberOfRefinementLevels;
numberOfRefinementLevels.Fill(3);
typename BSplinerType::ControlPointLatticeType::Pointer refinedControlPointLattice =
bspliner->RefineControlPointLattice(numberOfRefinementLevels);
auto bspliner2 = BSplinerType::New();
bspliner2->SetInput(refinedControlPointLattice);
bspliner2->SetSplineOrder(3);
bspliner2->SetSize(size);
bspliner2->SetOrigin(origin);
bspliner2->SetSpacing(spacing);
bspliner2->SetDirection(reader->GetOutput()->GetDirection());
try
{
bspliner2->Update();
}
catch (const itk::ExceptionObject & excep)
{
std::cerr << "Exception caught !" << std::endl;
std::cerr << excep << std::endl;
return EXIT_FAILURE;
}
auto writer2 = WriterType::New();
writer2->SetFileName(argv[4]);
writer2->SetInput(bspliner2->GetOutput());
writer2->Update();
return EXIT_SUCCESS;
}
int
itkBSplineControlPointImageFilterTest(int argc, char * argv[])
{
if (argc < 5)
{
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " imageDimension inputControlPointImage"
<< " outputSampledBSplineObject outputSampledBSplineObjectRefined" << std::endl;
exit(EXIT_FAILURE);
}
constexpr unsigned int Dimension = 2;
using RealType = float;
using ScalarPixelType = itk::Vector<RealType, 1>;
using ScalarFieldType = itk::Image<ScalarPixelType, Dimension>;
using BSplinerType = itk::BSplineControlPointImageFilter<ScalarFieldType, ScalarFieldType>;
auto bspliner = BSplinerType::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(bspliner, BSplineControlPointImageFilter, ImageToImageFilter);
int successOrFailure = EXIT_FAILURE;
switch (std::stoi(argv[1]))
{
case 2:
successOrFailure = BSpline<2>(argc, argv);
break;
case 3:
successOrFailure = BSpline<3>(argc, argv);
break;
default:
std::cerr << "Unsupported dimension" << std::endl;
exit(EXIT_FAILURE);
}
return successOrFailure;
}
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