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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkImageToVectorImageFilter.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 __itkImageToVectorImageFilter_txx
#define __itkImageToVectorImageFilter_txx
#include "itkImageToVectorImageFilter.h"
#include "itkImageRegionConstIterator.h"
#include "itkImageRegionConstIteratorWithIndex.h"
#include "itkImageRegionIterator.h"
namespace itk {
//----------------------------------------------------------------------------
template< class TInputImage >
ImageToVectorImageFilter< TInputImage >
::ImageToVectorImageFilter()
{
// At least 1 inputs is necessary for a vector image.
this->SetNumberOfRequiredInputs( 1 );
}
//----------------------------------------------------------------------------
template< class TInputImage >
void
ImageToVectorImageFilter< TInputImage >
::GenerateOutputInformation(void)
{
// Override the method in itkImageSource, so we can set the vector length of
// the output itk::VectorImage
this->Superclass::GenerateOutputInformation();
OutputImageType * output = this->GetOutput();
output->SetVectorLength(this->GetNumberOfInputs());
}
//----------------------------------------------------------------------------
template< class TInputImage >
void
ImageToVectorImageFilter< TInputImage >
::BeforeThreadedGenerateData()
{
// Check to verify all inputs are specified and have the same metadata,
// spacing etc...
const unsigned int numberOfInputs = this->GetNumberOfInputs();
RegionType region;
for (unsigned int i=0; i<numberOfInputs; i++)
{
InputImageType *input = static_cast< InputImageType * >(
this->ProcessObject::GetInput(i));
if (!input)
{
itkExceptionMacro(<< "Input " << i << " not set!");
}
if (i==0)
{
region = input->GetLargestPossibleRegion();
}
else if (input->GetLargestPossibleRegion() != region)
{
itkExceptionMacro(<< "All Inputs must have the same dimensions.");
}
}
}
//----------------------------------------------------------------------------
template< class TInputImage >
void
ImageToVectorImageFilter< TInputImage >
::ThreadedGenerateData(const RegionType& outputRegionForThread,
int )
{
typename OutputImageType::Pointer outputImage =
static_cast< OutputImageType * >(this->ProcessObject::GetOutput(0));
ImageRegionIterator< OutputImageType > oit(outputImage, outputRegionForThread);
oit.GoToBegin();
typedef ImageRegionConstIterator< InputImageType > InputIteratorType;
std::vector< InputIteratorType * > inputItContainer;
for( unsigned int i = 0; i< this->GetNumberOfInputs(); i++ )
{
typename InputImageType::Pointer inputImagePointer =
static_cast< InputImageType * >(this->ProcessObject::GetInput(i));
InputIteratorType *iit = new InputIteratorType(
inputImagePointer, outputRegionForThread );
iit->GoToBegin();
inputItContainer.push_back(iit);
}
typename OutputImageType::PixelType pix(this->GetNumberOfInputs());
while( !oit.IsAtEnd() )
{
for( unsigned int i = 0; i< this->GetNumberOfInputs(); i++ )
{
pix[i] = inputItContainer[i]->Get();
++(*inputItContainer[i]);
}
oit.Set(pix);
++oit;
}
for( unsigned int i = 0; i< this->GetNumberOfInputs(); i++ )
{
delete inputItContainer[i];
}
}
} // end namespace itk
#endif
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