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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 "itkDisplacementFieldTransform.h"
#include "itkDisplacementFieldTransformParametersAdaptor.h"
int
itkDisplacementFieldTransformParametersAdaptorTest(int, char *[])
{
constexpr unsigned int SpaceDimension = 3;
using CoordinateRepType = double;
using TransformType = itk::DisplacementFieldTransform<CoordinateRepType, SpaceDimension>;
/**
* Define the transformation domain
*/
using PointType = TransformType::PointType;
PointType origin;
origin.Fill(-5.0);
using SizeType = TransformType::SizeType;
SizeType size;
size.Fill(65);
using SpacingType = TransformType::SpacingType;
SpacingType spacing;
spacing.Fill(1.2);
using DirectionType = TransformType::DirectionType;
DirectionType direction;
direction.SetIdentity();
using DisplacementFieldType = TransformType::DisplacementFieldType;
auto displacementField = DisplacementFieldType::New();
displacementField->SetOrigin(origin);
displacementField->SetSpacing(spacing);
displacementField->SetRegions(size);
displacementField->SetDirection(direction);
displacementField->Allocate();
TransformType::OutputVectorType zeroVector;
zeroVector.Fill(0);
displacementField->FillBuffer(zeroVector);
TransformType::OutputVectorType nonzeroVector;
nonzeroVector.Fill(10.3);
DisplacementFieldType::IndexType index;
index.Fill(40);
displacementField->SetPixel(index, nonzeroVector);
/**
* Instantiate a transform
*/
std::cout << "Initialize transform." << std::endl;
auto transform = TransformType::New();
transform->SetDisplacementField(displacementField);
TransformType::InputPointType point;
point.Fill(50.0);
TransformType::OutputPointType outputPointBeforeAdapt = transform->TransformPoint(point);
SpacingType spacingBefore = transform->GetDisplacementField()->GetSpacing();
SizeType sizeBefore = transform->GetDisplacementField()->GetLargestPossibleRegion().GetSize();
/**
* Instantiate the adaptor
* we keep the transform domain definition the same except we increase
* the size and decrease the spacing.
*/
std::cout << "Instantiate adaptor." << std::endl;
SpacingType requiredSpacing;
requiredSpacing.Fill(0.6);
SizeType requiredSize;
for (unsigned int d = 0; d < SpaceDimension; ++d)
{
requiredSize[d] = static_cast<SizeType::SizeValueType>((spacing[d] * (size[d] - 1) / requiredSpacing[d]) + 1);
}
using AdaptorType = itk::DisplacementFieldTransformParametersAdaptor<TransformType>;
auto adaptor = AdaptorType::New();
adaptor->SetTransform(transform);
adaptor->SetRequiredSize(requiredSize);
adaptor->SetRequiredSpacing(requiredSpacing);
adaptor->SetRequiredOrigin(displacementField->GetOrigin());
adaptor->SetRequiredDirection(displacementField->GetDirection());
try
{
adaptor->AdaptTransformParameters();
}
catch (...)
{
std::cerr << "Error in adapting transform." << std::endl;
return EXIT_FAILURE;
}
SpacingType spacingAfter = transform->GetDisplacementField()->GetSpacing();
SizeType sizeAfter = transform->GetDisplacementField()->GetLargestPossibleRegion().GetSize();
std::cout << "Spacing: " << spacingBefore << "(before), " << spacingAfter << "(after)." << std::endl;
std::cout << "Size: " << sizeBefore << "(before), " << sizeAfter << "(after)." << std::endl;
TransformType::ParametersType fixedParameters = adaptor->GetRequiredFixedParameters();
std::cout << "Fixed parameters: " << fixedParameters << std::endl;
adaptor->SetRequiredFixedParameters(fixedParameters);
if (adaptor->GetRequiredSize() != transform->GetDisplacementField()->GetLargestPossibleRegion().GetSize())
{
std::cerr << "required size conversion is incorrect." << std::endl;
return EXIT_FAILURE;
}
if (adaptor->GetRequiredSpacing() != transform->GetDisplacementField()->GetSpacing())
{
std::cerr << "required spacing conversion is incorrect." << std::endl;
return EXIT_FAILURE;
}
if (adaptor->GetRequiredOrigin() != transform->GetDisplacementField()->GetOrigin())
{
std::cerr << "required origin conversion is incorrect." << std::endl;
return EXIT_FAILURE;
}
if (adaptor->GetRequiredDirection() != transform->GetDisplacementField()->GetDirection())
{
std::cerr << "required direction conversion is incorrect." << std::endl;
return EXIT_FAILURE;
}
TransformType::OutputPointType outputPointAfterAdapt = transform->TransformPoint(point);
if (outputPointBeforeAdapt.EuclideanDistanceTo(outputPointAfterAdapt) > 1e-6)
{
std::cout << point << " to (before) " << outputPointBeforeAdapt << std::endl;
std::cout << point << " to (after) " << outputPointAfterAdapt << std::endl;
std::cerr << "output points don't match up before and after adapt call." << std::endl;
return EXIT_FAILURE;
}
adaptor->Print(std::cout, 5);
return EXIT_SUCCESS;
}
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