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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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 "itkGaussianExponentialDiffeomorphicTransform.h"
#include "itkGaussianExponentialDiffeomorphicTransformParametersAdaptor.h"
#include "itkMath.h"
int itkGaussianExponentialDiffeomorphicTransformParametersAdaptorTest(int, char * [] )
{
const unsigned int SpaceDimension = 3;
typedef double CoordinateRepType;
typedef itk::GaussianExponentialDiffeomorphicTransform<CoordinateRepType, SpaceDimension> TransformType;
/**
* Define the transformation domain
*/
typedef TransformType::PointType PointType;
PointType origin;
origin.Fill( -5.0 );
typedef TransformType::SizeType SizeType;
SizeType size;
size.Fill( 65 );
typedef TransformType::SpacingType SpacingType;
SpacingType spacing;
spacing.Fill( 1.2 );
typedef TransformType::DirectionType DirectionType;
DirectionType direction;
direction.SetIdentity();
typedef TransformType::DisplacementFieldType DisplacementFieldType;
DisplacementFieldType::Pointer 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;
TransformType::Pointer transform = TransformType::New();
transform->SetConstantVelocityField( displacementField );
transform->IntegrateVelocityField();
TransformType::InputPointType point;
point.Fill( 50.0 );
TransformType::OutputPointType outputPointBeforeAdapt = transform->TransformPoint( point );
SpacingType spacingBefore = transform->GetConstantVelocityField()->GetSpacing();
SizeType sizeBefore = transform->GetConstantVelocityField()->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 );
}
typedef itk::GaussianExponentialDiffeomorphicTransformParametersAdaptor<TransformType> AdaptorType;
AdaptorType::Pointer adaptor = AdaptorType::New();
adaptor->SetTransform( transform );
adaptor->SetRequiredSize( requiredSize );
adaptor->SetRequiredSpacing( requiredSpacing );
adaptor->SetRequiredOrigin( displacementField->GetOrigin() );
adaptor->SetRequiredDirection( displacementField->GetDirection() );
float updateSmoothingVariance = 3.0;
float velocitySmoothingVariance = 0;
adaptor->SetGaussianSmoothingVarianceForTheUpdateField( updateSmoothingVariance );
adaptor->SetGaussianSmoothingVarianceForTheConstantVelocityField( velocitySmoothingVariance );
try
{
adaptor->AdaptTransformParameters();
}
catch(...)
{
std::cerr << "Error in adapting transform." << std::endl;
return EXIT_FAILURE;
}
SpacingType spacingAfter = transform->GetConstantVelocityField()->GetSpacing();
SizeType sizeAfter = transform->GetConstantVelocityField()->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;
}
if( itk::Math::NotAlmostEquals( adaptor->GetGaussianSmoothingVarianceForTheUpdateField(),
transform->GetGaussianSmoothingVarianceForTheUpdateField() ) )
{
std::cerr << "update field mesh conversion is incorrect." << std::endl;
return EXIT_FAILURE;
}
if( itk::Math::NotAlmostEquals( adaptor->GetGaussianSmoothingVarianceForTheConstantVelocityField(),
transform->GetGaussianSmoothingVarianceForTheConstantVelocityField() ) )
{
std::cerr << "total field mesh conversion is incorrect." << std::endl;
return EXIT_FAILURE;
}
TransformType::OutputPointType outputPointAfterAdapt = transform->TransformPoint( point );
std::cout << point << " to (before) " << outputPointBeforeAdapt << std::endl;
std::cout << point << " to (after) " << outputPointAfterAdapt << std::endl;
if( outputPointBeforeAdapt.EuclideanDistanceTo( outputPointAfterAdapt ) > 1e-6 )
{
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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