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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 <fstream>
#include "itkAffineTransform.h"
#include "itkBSplineTransform.h"
#include "itkTransformToDisplacementFieldSource.h"
#include "itkImageFileWriter.h"
int itkTransformToDisplacementFieldSourceTest( int argc, char * argv [] )
{
/** Check command line arguments. */
if( argc < 3 )
{
std::cerr << "You must supply transform and output filename" << std::endl;
return EXIT_FAILURE;
}
std::string transformName = argv[ 1 ];
std::string fileName = argv[ 2 ];
std::string bSplineParametersFile;
if ( argc > 3 )
{
bSplineParametersFile = argv[ 3 ];
}
/** Typedefs. */
const unsigned int Dimension = 2;
typedef float ScalarPixelType;
typedef double CoordRepresentationType;
const unsigned int SplineOrder = 3;
typedef itk::Vector<
ScalarPixelType, Dimension > VectorPixelType;
typedef itk::Image<
VectorPixelType, Dimension > DisplacementFieldImageType;
typedef itk::Transform<
CoordRepresentationType, Dimension,
Dimension > TransformType;
typedef itk::AffineTransform<
CoordRepresentationType, Dimension > AffineTransformType;
typedef itk::BSplineTransform<
CoordRepresentationType, Dimension,
SplineOrder > BSplineTransformType;
typedef TransformType::ParametersType ParametersType;
typedef itk::TransformToDisplacementFieldSource<
DisplacementFieldImageType,
CoordRepresentationType > DisplacementFieldGeneratorType;
typedef DisplacementFieldGeneratorType::SizeType SizeType;
typedef DisplacementFieldGeneratorType::SpacingType SpacingType;
typedef DisplacementFieldGeneratorType::OriginType OriginType;
typedef DisplacementFieldGeneratorType::IndexType IndexType;
typedef itk::ImageFileWriter<
DisplacementFieldImageType > WriterType;
/** Create output information. */
SizeType size; size.Fill( 20 );
IndexType index; index.Fill( 0 );
SpacingType spacing; spacing.Fill( 0.7 );
OriginType origin; origin.Fill( -10.0 );
/** Create transforms. */
AffineTransformType::Pointer affineTransform
= AffineTransformType::New();
BSplineTransformType::Pointer bSplineTransform
= BSplineTransformType::New();
if ( transformName == "Affine" )
{
/** Set the options. */
OriginType centerOfRotation;
centerOfRotation[ 0 ] = -3.0; centerOfRotation[ 1 ] = -3.0;
affineTransform->SetCenter( centerOfRotation );
/** Create and set parameters. */
ParametersType parameters( affineTransform->GetNumberOfParameters() );
parameters[ 0 ] = 1.1;
parameters[ 1 ] = 0.1;
parameters[ 2 ] = -0.2;
parameters[ 3 ] = 0.9;
parameters[ 4 ] = 10.3;
parameters[ 5 ] = -33.8;
affineTransform->SetParameters( parameters );
}
else if ( transformName == "BSpline" )
{
/** Set the options. */
BSplineTransformType::PhysicalDimensionsType dimensions;
for( unsigned int d = 0; d < Dimension; d++ )
{
dimensions[d] = spacing[d] * ( size[d] - 1.0 );
}
BSplineTransformType::MeshSizeType meshSize;
BSplineTransformType::DirectionType direction;
direction.SetIdentity();
meshSize[0] = 7 - SplineOrder;
meshSize[1] = 10 - SplineOrder;
bSplineTransform->SetTransformDomainOrigin( origin );
bSplineTransform->SetTransformDomainPhysicalDimensions( dimensions );
bSplineTransform->SetTransformDomainMeshSize( meshSize );
bSplineTransform->SetTransformDomainDirection( direction );
/** Create and set parameters. */
ParametersType parameters( bSplineTransform->GetNumberOfParameters() );
std::ifstream input( bSplineParametersFile.c_str() );
if ( input.is_open() )
{
for ( unsigned int i = 0; i < parameters.GetSize(); ++i )
{
input >> parameters[ i ];
}
input.close();
}
else
{
std::cerr << "ERROR: B-spline parameter file not found." << std::endl;
return EXIT_FAILURE;
}
bSplineTransform->SetParametersByValue( parameters );
}
else
{
std::cerr << "ERROR: Not a valid transform." << std::endl;
return EXIT_FAILURE;
}
/** Create an setup displacement field generator. */
DisplacementFieldGeneratorType::Pointer defGenerator
= DisplacementFieldGeneratorType::New();
std::cout << "Name of Class: " << defGenerator->GetNameOfClass()
<< std::endl;
defGenerator->SetOutputSize( size );
defGenerator->SetOutputSpacing( spacing );
defGenerator->SetOutputOrigin( origin );
defGenerator->SetOutputIndex( index );
//
// for coverage, exercise access methods
spacing = defGenerator->GetOutputSpacing();
origin = defGenerator->GetOutputOrigin();
DisplacementFieldGeneratorType::DirectionType
direction = defGenerator->GetOutputDirection();
std::cout << "Spacing " << spacing
<< " Origin " << origin
<< std::endl << "Direction "
<< direction
<< std::endl;
//defGenerator->SetOutputDirection( direction );
if ( transformName == "Affine" )
{
defGenerator->SetTransform( affineTransform );
}
else if ( transformName == "BSpline" )
{
defGenerator->SetTransform( bSplineTransform );
}
std::cout << "Transform: " << defGenerator->GetTransform()
<< std::endl;
DisplacementFieldGeneratorType::OutputImageRegionType
outputRegion = defGenerator->GetOutputRegion();
defGenerator->SetOutputRegion(outputRegion);
/** Write displacement field to disk. */
WriterType::Pointer writer
= WriterType::New();
writer->SetInput( defGenerator->GetOutput() );
writer->SetFileName( fileName.c_str() );
try
{
writer->Update();
}
catch ( itk::ExceptionObject & e )
{
std::cerr << "Exception detected while generating displacement field" << argv[1];
std::cerr << " : " << e.GetDescription();
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
} // end main
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