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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkSignedDanielssonDistanceMapImageFilter.txx
Language: C++
Date: $Date$
Version: $Revision$
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 __itkSignedDanielssonDistanceMapImageFilter_txx
#define __itkSignedDanielssonDistanceMapImageFilter_txx
#include "itkSignedDanielssonDistanceMapImageFilter.h"
#include "itkProgressAccumulator.h"
#include "itkBinaryBallStructuringElement.h"
#include "itkBinaryDilateImageFilter.h"
#include "itkUnaryFunctorImageFilter.h"
namespace itk
{
/**
* Constructor
*/
template <class TInputImage,class TOutputImage>
SignedDanielssonDistanceMapImageFilter<TInputImage,TOutputImage>
::SignedDanielssonDistanceMapImageFilter()
{
this->SetNumberOfRequiredOutputs( 3 );
OutputImagePointer voronoiMap = OutputImageType::New();
this->SetNthOutput( 1, voronoiMap.GetPointer() );
VectorImagePointer distanceVectors = VectorImageType::New();
this->SetNthOutput( 2, distanceVectors.GetPointer() );
//Default values
this->m_SquaredDistance = false; //Should we remove this ?
//doesn't make sense in a SignedDaniel
this->m_UseImageSpacing = false;
this->m_InsideIsPositive = false;
}
/** This is overloaded to create the VectorDistanceMap output image */
template <class TInputImage,class TOutputImage>
typename SignedDanielssonDistanceMapImageFilter<
TInputImage,TOutputImage>::DataObjectPointer
SignedDanielssonDistanceMapImageFilter<TInputImage,TOutputImage>
::MakeOutput(unsigned int idx)
{
if (idx == 2)
{
return static_cast<DataObject*>(VectorImageType::New().GetPointer());
}
return Superclass::MakeOutput(idx);
}
/**
* Return the distance map Image pointer
*/
template <class TInputImage,class TOutputImage>
typename SignedDanielssonDistanceMapImageFilter<
TInputImage,TOutputImage>::OutputImageType *
SignedDanielssonDistanceMapImageFilter<TInputImage,TOutputImage>
::GetDistanceMap(void)
{
return dynamic_cast< OutputImageType * >(
this->ProcessObject::GetOutput(0) );
}
/**
* Return Closest Points Map
*/
template <class TInputImage,class TOutputImage>
typename
SignedDanielssonDistanceMapImageFilter<TInputImage,TOutputImage>::OutputImageType*
SignedDanielssonDistanceMapImageFilter<TInputImage,TOutputImage>
::GetVoronoiMap(void)
{
return dynamic_cast< OutputImageType * >(
this->ProcessObject::GetOutput(1) );
}
/**
* Return the distance vectors
*/
template <class TInputImage,class TOutputImage>
typename SignedDanielssonDistanceMapImageFilter<
TInputImage,TOutputImage>::VectorImageType *
SignedDanielssonDistanceMapImageFilter<TInputImage,TOutputImage>
::GetVectorDistanceMap(void)
{
return dynamic_cast< VectorImageType * >(
this->ProcessObject::GetOutput(2) );
}
/**
* Compute Distance and Voronoi maps by calling
* DanielssonDistanceMapImageFilter twice.
*/
template <class TInputImage,class TOutputImage>
void SignedDanielssonDistanceMapImageFilter<TInputImage,TOutputImage>
::GenerateData()
{
//Set up mini pipeline filter
typename ProgressAccumulator::Pointer progress = ProgressAccumulator::New();
progress->SetMiniPipelineFilter(this);
typedef DanielssonDistanceMapImageFilter<
InputImageType, OutputImageType > FilterType;
typename FilterType::Pointer filter1= FilterType::New();
typename FilterType::Pointer filter2= FilterType::New();
filter1->SetInputIsBinary( true ); // Force signed distance map to work on
filter2->SetInputIsBinary( true ); // binary images
filter1->SetUseImageSpacing( m_UseImageSpacing );
filter2->SetUseImageSpacing( m_UseImageSpacing );
filter1->SetSquaredDistance( m_SquaredDistance );
filter2->SetSquaredDistance( m_SquaredDistance );
//Invert input image for second Danielsson filter
typedef typename InputImageType::PixelType InputPixelType;
typedef Functor::InvertIntensityFunctor< InputPixelType > FunctorType;
typedef UnaryFunctorImageFilter< InputImageType,
InputImageType,
FunctorType > InverterType;
typename InverterType::Pointer inverter = InverterType::New();
inverter->SetInput(this->GetInput());
//Dilate the inverted image by 1 pixel to give it the same boundary
//as the univerted input.
typedef BinaryBallStructuringElement<
InputPixelType,
InputImageDimension > StructuringElementType;
typedef BinaryDilateImageFilter<
InputImageType,
InputImageType,
StructuringElementType > DilatorType;
typename DilatorType::Pointer dilator = DilatorType::New();
StructuringElementType structuringElement;
structuringElement.SetRadius( 1 ); // 3x3 structuring element
structuringElement.CreateStructuringElement();
dilator->SetKernel( structuringElement );
dilator->SetDilateValue(1);
filter1->SetInput( this->GetInput() );
dilator->SetInput( inverter->GetOutput() );
filter2->SetInput( dilator->GetOutput() );
//Subtract Distance maps results of the two Danielsson filters
typedef SubtractImageFilter< OutputImageType, OutputImageType,
OutputImageType > SubtracterType;
typename SubtracterType::Pointer subtracter = SubtracterType::New();
if ( m_InsideIsPositive )
{
subtracter->SetInput1(filter2->GetDistanceMap());
subtracter->SetInput2(filter1->GetDistanceMap());
}
else
{
subtracter->SetInput2(filter2->GetDistanceMap());
subtracter->SetInput1(filter1->GetDistanceMap());
}
subtracter->Update();
filter1->Update();
filter2->Update();
// Register progress
progress->RegisterInternalFilter(filter1,.5f);
// Graft outputs
this->GraftNthOutput( 0, subtracter->GetOutput() );
// we must use not use this->GetOutput method because the
// output's are of different types then ImageSource
this->GraftNthOutput( 1, filter1->GetVoronoiMap() );
this->GraftNthOutput( 2, filter1->GetVectorDistanceMap() );
}
// end GenerateData()
/**
* Print Self
*/
template <class TInputImage,class TOutputImage>
void SignedDanielssonDistanceMapImageFilter<TInputImage,TOutputImage>
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os,indent);
os << indent << "Signed Danielson Distance: " << std::endl;
os << indent << "Use Image Spacing : " << m_UseImageSpacing << std::endl;
os << indent << "Squared Distance : " << m_SquaredDistance << std::endl;
os << indent << "Inside is positive : " << m_InsideIsPositive << std::endl;
}
} // end namespace itk
#endif
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