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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkMorphologyImageFilter.txx,v $
Language: C++
Date: $Date: 2006-01-11 19:43:31 $
Version: $Revision: 1.31 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkMorphologyImageFilter_txx
#define __itkMorphologyImageFilter_txx
#include <limits.h>
#include "itkConstantBoundaryCondition.h"
#include "itkNumericTraits.h"
#include "itkMorphologyImageFilter.h"
#include "itkNeighborhoodAlgorithm.h"
#include "itkProgressReporter.h"
namespace itk {
template<class TInputImage, class TOutputImage, class TKernel>
MorphologyImageFilter<TInputImage, TOutputImage, TKernel>
::MorphologyImageFilter()
: m_Kernel()
{
m_DefaultBoundaryCondition.SetConstant( NumericTraits<PixelType>::Zero );
m_BoundaryCondition = &m_DefaultBoundaryCondition;
}
template <class TInputImage, class TOutputImage, class TKernel>
void
MorphologyImageFilter<TInputImage, TOutputImage, TKernel>
::GenerateInputRequestedRegion()
{
// call the superclass' implementation of this method
Superclass::GenerateInputRequestedRegion();
// get pointers to the input and output
typename Superclass::InputImagePointer inputPtr =
const_cast< TInputImage * >( this->GetInput() );
if ( !inputPtr )
{
return;
}
// get a copy of the input requested region (should equal the output
// requested region)
typename TInputImage::RegionType inputRequestedRegion;
inputRequestedRegion = inputPtr->GetRequestedRegion();
// pad the input requested region by the operator radius
inputRequestedRegion.PadByRadius( m_Kernel.GetRadius() );
// crop the input requested region at the input's largest possible region
if ( inputRequestedRegion.Crop(inputPtr->GetLargestPossibleRegion()) )
{
inputPtr->SetRequestedRegion( inputRequestedRegion );
return;
}
else
{
// Couldn't crop the region (requested region is outside the largest
// possible region). Throw an exception.
// store what we tried to request (prior to trying to crop)
inputPtr->SetRequestedRegion( inputRequestedRegion );
// build an exception
InvalidRequestedRegionError e(__FILE__, __LINE__);
e.SetLocation(ITK_LOCATION);
e.SetDescription("Requested region is (at least partially) outside the largest possible region.");
e.SetDataObject(inputPtr);
throw e;
}
}
template<class TInputImage, class TOutputImage, class TKernel>
void
MorphologyImageFilter<TInputImage, TOutputImage, TKernel>
::ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
int threadId)
{
// Neighborhood iterators
NeighborhoodIteratorType b_iter;
// Find the boundary "faces"
typename NeighborhoodAlgorithm::ImageBoundaryFacesCalculator<InputImageType>::FaceListType faceList;
NeighborhoodAlgorithm::ImageBoundaryFacesCalculator<InputImageType> fC;
faceList = fC(this->GetInput(), outputRegionForThread, m_Kernel.GetRadius());
typename NeighborhoodAlgorithm::ImageBoundaryFacesCalculator<InputImageType>::FaceListType::iterator fit;
ImageRegionIterator<TOutputImage> o_iter;
ProgressReporter progress(this, threadId, outputRegionForThread.GetNumberOfPixels());
// Process the boundary faces, these are N-d regions which border the
// edge of the buffer
const KernelIteratorType kernelBegin = m_Kernel.Begin();
const KernelIteratorType kernelEnd = m_Kernel.End();
for (fit = faceList.begin(); fit != faceList.end(); ++fit)
{
b_iter = NeighborhoodIteratorType(m_Kernel.GetRadius(),
this->GetInput(), *fit);
o_iter = ImageRegionIterator<OutputImageType>(this->GetOutput(), *fit);
b_iter.OverrideBoundaryCondition(m_BoundaryCondition);
b_iter.GoToBegin();
while ( ! o_iter.IsAtEnd() )
{
o_iter.Set( this->Evaluate(b_iter, kernelBegin, kernelEnd) );
++b_iter;
++o_iter;
progress.CompletedPixel();
}
}
}
template<class TInputImage, class TOutputImage, class TKernel>
void
MorphologyImageFilter<TInputImage, TOutputImage, TKernel>
::PrintSelf(std::ostream &os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Kernel: " << m_Kernel << std::endl;
os << indent << "Boundary condition: " << typeid( *m_BoundaryCondition ).name() << std::endl;
}
}// end namespace itk
#endif
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