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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 "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkSimpleFilterWatcher.h"
#include "itkThresholdLabelerImageFilter.h"
#include "itkChangeLabelImageFilter.h"
#include "itkProjectionImageFilter.h"
namespace itk
{
namespace ProjectionImageFilterNamespace
{
namespace Function
{
template <typename TInputPixel, typename TOutputPixel>
class BinaryAccumulator
{
public:
BinaryAccumulator( unsigned long ) : m_IsForeground(false) {}
~BinaryAccumulator(){}
inline void Initialize()
{
m_IsForeground = false;
}
inline void operator()( const TInputPixel &input )
{
if( input == 100 )
{
m_IsForeground = true;
}
}
inline TOutputPixel GetValue()
{
if( m_IsForeground )
{
return 100;
}
else
{
return 0;
}
}
bool m_IsForeground;
};
} // end namespace Function
} // end namespace ProjectionImageFilterNamespace
} // end namespace itk
int itkProjectionImageFilterTest(int argc, char * argv[])
{
if( argc < 5 )
{
std::cerr << "Missing Parameters " << std::endl;
std::cerr << "Usage: " << argv[0];
std::cerr << " InputImage OutputImage Foreground Background" << std::endl;
return EXIT_FAILURE;
}
const int dim = 3;
typedef unsigned char PixelType;
typedef itk::Image< PixelType, dim > ImageType;
typedef itk::ImageFileReader< ImageType > ReaderType;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[1] );
// produce an image with 3 labels: 0 (background), 100 and 200
typedef itk::ThresholdLabelerImageFilter< ImageType, ImageType > LabelerType;
LabelerType::Pointer labeler = LabelerType::New();
labeler->SetInput( reader->GetOutput() );
LabelerType::RealThresholdVector thresholds;
thresholds.push_back( 100 );
thresholds.push_back( 200 );
labeler->SetRealThresholds( thresholds );
typedef itk::ChangeLabelImageFilter< ImageType, ImageType > ChangeType;
ChangeType::Pointer change = ChangeType::New();
change->SetInput( labeler->GetOutput() );
change->SetChange( 1, 100 );
change->SetChange( 2, 200 );
typedef itk::ProjectionImageFilterNamespace::Function::BinaryAccumulator<
PixelType, PixelType> FunctionType;
typedef itk::ProjectionImageFilter<
ImageType, ImageType, FunctionType > FilterType;
FilterType::Pointer filter = FilterType::New();
filter->SetInput( change->GetOutput() );
itk::SimpleFilterWatcher watcher(filter, "filter");
typedef itk::ImageFileWriter< ImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetInput( filter->GetOutput() );
writer->SetFileName( argv[2] );
try
{
writer->Update();
}
catch ( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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