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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkBSplineUpsampleImageFilter_hxx
#define itkBSplineUpsampleImageFilter_hxx
namespace itk
{
/**
* Standard "PrintSelf" method
*/
template <typename TInputImage, typename TOutputImage, typename ResamplerType>
void
BSplineUpsampleImageFilter<TInputImage, TOutputImage, ResamplerType>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
}
template <typename TInputImage, typename TOutputImage, typename 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(outputPtr, outputPtr->GetRequestedRegion());
// Calculate actual output
// TODO: Need to verify outIt is correctly sized.
Superclass::ExpandNDImage(outIt);
}
/**
*
*/
template <typename TInputImage, typename TOutputImage, typename 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();
// 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] / 2;
}
const typename TInputImage::RegionType inputRequestedRegion(inputRequestedRegionStartIndex, inputRequestedRegionSize);
inputPtr->SetRequestedRegion(inputRequestedRegion);
}
/**
*
*/
template <typename TInputImage, typename TOutputImage, typename 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] / 2.0;
// TODO: Verify this is being rounded correctly.
outputSize[i] = static_cast<unsigned int>(std::floor(static_cast<double>(inputSize[i] * 2.0)));
outputStartIndex[i] = static_cast<int>(std::ceil(static_cast<double>(inputStartIndex[i]) * 2.0));
}
outputPtr->SetSpacing(outputSpacing);
const typename TOutputImage::RegionType outputLargestPossibleRegion(outputStartIndex, outputSize);
outputPtr->SetLargestPossibleRegion(outputLargestPossibleRegion);
}
/*
* EnlargeOutputRequestedRegion method.
*/
template <typename TInputImage, typename TOutputImage, typename 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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