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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 "itkComposeDisplacementFieldsImageFilter.h"
#include "itkImageRegionIterator.h"
int itkComposeDisplacementFieldsImageFilterTest( int, char * [] )
{
const unsigned int ImageDimension = 2;
typedef itk::Vector<float, ImageDimension> VectorType;
typedef itk::Image<VectorType, ImageDimension> DisplacementFieldType;
// Create a displacement field
DisplacementFieldType::PointType origin;
DisplacementFieldType::SpacingType spacing;
DisplacementFieldType::SizeType size;
DisplacementFieldType::DirectionType direction;
direction.SetIdentity();
origin.Fill( 0.0 );
spacing.Fill( 0.5 );
size.Fill( 100 );
VectorType ones( 1 );
DisplacementFieldType::Pointer field = DisplacementFieldType::New();
field->SetOrigin( origin );
field->SetSpacing( spacing );
field->SetRegions( size );
field->SetDirection( direction );
field->Allocate();
field->FillBuffer( ones );
typedef itk::ComposeDisplacementFieldsImageFilter<DisplacementFieldType> ComposerType;
ComposerType::Pointer composer = ComposerType::New();
composer->SetDisplacementField( field );
composer->SetWarpingField( field );
composer->Update();
std::cout << "displacement field: " << composer->GetDisplacementField() << std::endl;
std::cout << "warping field: " << composer->GetWarpingField() << std::endl;
std::cout << "interpolator: " << composer->GetInterpolator() << std::endl;
try
{
composer->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << "Exception thrown " << std::endl;
std::cerr << excp << std::endl;
}
DisplacementFieldType::IndexType index;
index[0] = 30;
index[1] = 30;
VectorType v = composer->GetOutput()->GetPixel( index );
if( itk::Math::NotAlmostEquals( v[0], 2 ) || itk::Math::NotAlmostEquals( v[1], 2 ) )
{
std::cerr << "Failed to compose properly." << std::endl;
}
composer->Print( std::cout, 3 );
return EXIT_SUCCESS;
}
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