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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkBSplineUpsampleImageFilter.txx,v $
Language: C++
Date: $Date: 2006-08-01 19:16:17 $
Version: $Revision: 1.8 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
Portions of this code are covered under the VTK copyright.
See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.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 _itkBSplineUpsampleImageFilter_txx
#define _itkBSplineUpsampleImageFilter_txx
#include "itkBSplineUpsampleImageFilter.h"
namespace itk
{
/**
* Constructor
*/
template <class TInputImage, class TOutputImage, class ResamplerType>
BSplineUpsampleImageFilter<TInputImage,TOutputImage, ResamplerType>
::BSplineUpsampleImageFilter()
{
}
/**
* Standard "PrintSelf" method
*/
template <class TInputImage, class TOutputImage, class ResamplerType>
void
BSplineUpsampleImageFilter<TInputImage,TOutputImage, ResamplerType>
::PrintSelf(
std::ostream& os,
Indent indent) const
{
Superclass::PrintSelf( os, indent );
}
template <class TInputImage, class TOutputImage, class ResamplerType>
void
BSplineUpsampleImageFilter<TInputImage,TOutputImage, ResamplerType>
::GenerateData()
{
itkDebugMacro(<<"Actually executing");
// Get the input and output pointers
InputImagePointer inputPtr = const_cast< TInputImage * > ( this->GetInput() );
OutputImagePointer outputPtr = this->GetOutput();
// Since we are providing a GenerateData() method, we need to allocate the
// output buffer memory (if we provided a ThreadedGenerateData(), then
// the memory would have already been allocated for us).
outputPtr->SetBufferedRegion( outputPtr->GetRequestedRegion() );
outputPtr->Allocate();
// Iterator for walking the output region is defined in the SuperClass
OutputImageIterator outIt = OutputImageIterator(outputPtr,
outputPtr->GetRequestedRegion());
// Calculate actual output
// TODO: Need to verify outIt is correctly sized.
Superclass::ExpandNDImage(outIt);
}
/**
*
*/
template <class TInputImage, class TOutputImage, class ResamplerType>
void
BSplineUpsampleImageFilter<TInputImage,TOutputImage, ResamplerType>
::GenerateInputRequestedRegion()
{
// call the superclass' implementation of this method
Superclass::GenerateInputRequestedRegion();
// get pointers to the input and output
InputImagePointer inputPtr = const_cast< TInputImage * > ( this->GetInput() );
OutputImagePointer outputPtr = this->GetOutput();
if( !outputPtr || !inputPtr )
{
return;
}
inputPtr->SetRequestedRegionToLargestPossibleRegion();
// we need to compute the input requested region (size and start index)
unsigned int i;
const typename TOutputImage::SizeType& outputRequestedRegionSize
= outputPtr->GetRequestedRegion().GetSize();
const typename TOutputImage::IndexType& outputRequestedRegionStartIndex
= outputPtr->GetRequestedRegion().GetIndex();
typename TInputImage::SizeType inputRequestedRegionSize;
typename TInputImage::IndexType inputRequestedRegionStartIndex;
for (i = 0; i < TInputImage::ImageDimension; i++)
{
inputRequestedRegionSize[i]
= outputRequestedRegionSize[i] / 2;
inputRequestedRegionStartIndex[i]
= outputRequestedRegionStartIndex[i] / (int)2;
}
typename TInputImage::RegionType inputRequestedRegion;
inputRequestedRegion.SetSize( inputRequestedRegionSize );
inputRequestedRegion.SetIndex( inputRequestedRegionStartIndex );
inputPtr->SetRequestedRegion( inputRequestedRegion );
}
/**
*
*/
template <class TInputImage, class TOutputImage, class ResamplerType>
void
BSplineUpsampleImageFilter<TInputImage,TOutputImage, ResamplerType>
::GenerateOutputInformation()
{
// call the superclass' implementation of this method
Superclass::GenerateOutputInformation();
// get pointers to the input and output
InputImagePointer inputPtr = const_cast< TInputImage * > ( this->GetInput() );
OutputImagePointer outputPtr = this->GetOutput();
if( !outputPtr || !inputPtr )
{
return;
}
// we need to compute the output spacing, the output image size, and the
// output image start index
unsigned int i;
const typename TInputImage::SpacingType&
inputSpacing = inputPtr->GetSpacing();
const typename TInputImage::SizeType& inputSize
= inputPtr->GetLargestPossibleRegion().GetSize();
const typename TInputImage::IndexType& inputStartIndex
= inputPtr->GetLargestPossibleRegion().GetIndex();
typename TOutputImage::SpacingType outputSpacing;
typename TOutputImage::SizeType outputSize;
typename TOutputImage::IndexType outputStartIndex;
for (i = 0; i < TOutputImage::ImageDimension; i++)
{
//TODO: Verify this is being rounded correctly.
outputSpacing[i] = inputSpacing[i] / (double) 2;
//TODO: Verify this is being rounded correctly.
outputSize[i] = (unsigned int) vcl_floor((double)(inputSize[i] * 2.0) );
outputStartIndex[i] = (int)vcl_ceil((double) inputStartIndex[i] * 2.0 );
}
outputPtr->SetSpacing( outputSpacing );
typename TOutputImage::RegionType outputLargestPossibleRegion;
outputLargestPossibleRegion.SetSize( outputSize );
outputLargestPossibleRegion.SetIndex( outputStartIndex );
outputPtr->SetLargestPossibleRegion( outputLargestPossibleRegion );
}
/*
* EnlargeOutputRequestedRegion method.
*/
template <class TInputImage, class TOutputImage, class ResamplerType>
void
BSplineUpsampleImageFilter<TInputImage,TOutputImage, ResamplerType>
::EnlargeOutputRequestedRegion(
DataObject *output )
{
// this filter requires the all of the output image to be in
// the buffer
TOutputImage *imgData;
imgData = dynamic_cast<TOutputImage*>( output );
if ( imgData )
{
imgData->SetRequestedRegionToLargestPossibleRegion();
}
else
{
// pointer could not be cast to TLevelSet *
itkWarningMacro(<< "itk::BSplineUpsampleImageFilter" <<
"::EnlargeOutputRequestedRegion cannot cast "
<< typeid(output).name() << " to "
<< typeid(TOutputImage*).name() );
}
}
} // namespace itk
#endif
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