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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.
*
*=========================================================================*/
// This example is based on ITK's DeformableRegistration2.cxx example
#include <SimpleITK.h>
#include <iostream>
#include <stdlib.h>
#include <iomanip>
namespace sitk = itk::simple;
class IterationUpdate
: public sitk::Command
{
public:
IterationUpdate( const sitk::FastSymmetricForcesDemonsRegistrationFilter &m)
: m_Filter(m)
{}
virtual void Execute( )
{
// use sitk's output operator for std::vector etc..
using sitk::operator<<;
// stash the stream state
std::ios state(NULL);
state.copyfmt(std::cout);
std::cout << std::fixed << std::setfill(' ') << std::setprecision( 5 );
std::cout << std::setw(3) << m_Filter.GetElapsedIterations();
std::cout << " = " << std::setw(10) << m_Filter.GetMetric();
std::cout << std::endl;
std::cout.copyfmt(state);
}
private:
const sitk::FastSymmetricForcesDemonsRegistrationFilter &m_Filter;
};
int main(int argc, char *argv[])
{
if ( argc < 4 )
{
std::cerr << "Usage: " << argv[0] << " <fixedImageFilter> <movingImageFile> [initialTransformFile] <outputTransformFile>" << std::endl;
return 1;
}
sitk::Image fixed = sitk::ReadImage( argv[1] );
sitk::Image moving = sitk::ReadImage( argv[2] );
sitk::HistogramMatchingImageFilter matcher;
if ( fixed.GetPixelID() == sitk::sitkUInt8
|| fixed.GetPixelID() == sitk::sitkInt8 )
{
matcher.SetNumberOfHistogramLevels( 128 );
}
else
{
matcher.SetNumberOfHistogramLevels( 1024 );
}
matcher.SetNumberOfMatchPoints( 7 );
matcher.ThresholdAtMeanIntensityOn();
moving = matcher.Execute(moving, fixed);
sitk::FastSymmetricForcesDemonsRegistrationFilter filter;
IterationUpdate cmd(filter);
filter.AddCommand( sitk::sitkIterationEvent, cmd );
filter.SetNumberOfIterations( 200 );
filter.SetStandardDeviations( 1.0 );
sitk::Image displacementField;
if ( argc > 4 )
{
sitk::Transform initialTransform = sitk::ReadTransform( argv[3] );
argv[3] = argv[4];
--argc;
sitk::TransformToDisplacementFieldFilter toDisplacementFilter;
toDisplacementFilter.SetReferenceImage(fixed);
displacementField = toDisplacementFilter.Execute(initialTransform);
displacementField = filter.Execute( fixed, moving, displacementField );
}
else
{
displacementField = filter.Execute( fixed, moving );
}
std::cout << "-------" << std::endl;
std::cout << "Number Of Iterations: " << filter.GetElapsedIterations() << std::endl;
std::cout << " RMS: " << filter.GetRMSChange() << std::endl;
sitk::DisplacementFieldTransform outTx( displacementField );
sitk::WriteTransform(outTx, argv[3]);
return 0;
}
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