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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 "itkIterativeInverseDisplacementFieldImageFilter.h"
#include "itkImageFileWriter.h"
#include "itkFilterWatcher.h"
int itkIterativeInverseDisplacementFieldImageFilterTest( int argc, char * argv[] )
{
if( argc < 2 )
{
std::cerr << "Missing Parameters " << std::endl;
std::cerr << "Usage: " << argv[0];
std::cerr << " outputImage" << std::endl;
return EXIT_FAILURE;
}
const unsigned int Dimension = 2;
typedef float VectorComponentType;
typedef itk::Vector< VectorComponentType, Dimension > VectorType;
typedef itk::Image< VectorType, Dimension > DisplacementFieldType;
typedef itk::IterativeInverseDisplacementFieldImageFilter<
DisplacementFieldType,
DisplacementFieldType
> FilterType;
FilterType::Pointer filter = FilterType::New();
FilterWatcher watcher(filter);
// Creating an input displacement field
DisplacementFieldType::Pointer field = DisplacementFieldType::New();
DisplacementFieldType::SpacingType spacing;
spacing.Fill( 1.0 );
DisplacementFieldType::PointType origin;
origin.Fill( 0.0 );
DisplacementFieldType::RegionType region;
DisplacementFieldType::SizeType size;
DisplacementFieldType::IndexType start;
size[0] = 128;
size[1] = 128;
start[0] = 0;
start[1] = 0;
region.SetSize( size );
region.SetIndex( start );
field->SetOrigin( origin );
field->SetSpacing( spacing );
field->SetRegions( region );
field->Allocate();
VectorType pixelValue;
itk::ImageRegionIteratorWithIndex< DisplacementFieldType > it( field, region );
// Fill the field with some vectors
it.GoToBegin();
while( !it.IsAtEnd() )
{
DisplacementFieldType::IndexType index = it.GetIndex();
pixelValue[0] = index[0] * 2.0;
pixelValue[1] = index[1] * 2.0;
it.Set( pixelValue );
++it;
}
// Use the same geometry for the inverse field.
// This is for simplicity here, in general a
// different geometry should be used.
// filter->SetOutputSpacing( spacing );
// keep the origin
// filter->SetOutputOrigin( origin );
// set the size
// filter->SetSize( size );
filter->SetInput( field );
try
{
filter->UpdateLargestPossibleRegion();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << "Exception thrown " << std::endl;
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
// Write an image for regression testing
typedef itk::ImageFileWriter< DisplacementFieldType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetInput (filter->GetOutput());
writer->SetFileName( argv[1] );
try
{
writer->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << "Exception thrown by writer" << std::endl;
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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