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/*
* Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
* Copyright (C) 2007-2012 Institut Mines Telecom / Telecom Bretagne
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
#ifndef otbSubsampleImageFilter_hxx
#define otbSubsampleImageFilter_hxx
#include "otbSubsampleImageFilter.h"
#include "otbMacro.h"
#include "otbSubsampledImageRegionIterator.h"
#include "itkImageRegionIterator.h"
#include "itkProgressReporter.h"
namespace otb
{
template <class TInputImage, class TOutputImage, Wavelet::WaveletDirection TDirectionOfTransformation>
void SubsampleImageFilter<TInputImage, TOutputImage, TDirectionOfTransformation>::PrintSelf(std::ostream& os, itk::Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "SubsampleFactor = [" << m_SubsampleFactor[0];
for (unsigned int i = 1; i < InputImageDimension; ++i)
{
os << ", " << m_SubsampleFactor[i];
}
os << "]\n";
}
template <class TInputImage, class TOutputImage, Wavelet::WaveletDirection TDirectionOfTransformation>
bool SubsampleImageFilter<TInputImage, TOutputImage, TDirectionOfTransformation>::IsSubsampleFactorOne() const
{
for (unsigned int i = 0; i < InputImageDimension; ++i)
{
if (m_SubsampleFactor[i] != 1)
return false;
}
return true;
}
template <class TInputImage, class TOutputImage, Wavelet::WaveletDirection TDirectionOfTransformation>
void SubsampleImageFilter<TInputImage, TOutputImage, TDirectionOfTransformation>::GenerateOutputInformation()
{
Superclass::GenerateOutputInformation();
if (!IsSubsampleFactorOne())
{
OutputImageRegionType newRegion;
this->CallCopyInputRegionToOutputRegion(newRegion, this->GetInput()->GetLargestPossibleRegion());
this->GetOutput()->SetRegions(newRegion);
}
}
template <class TInputImage, class TOutputImage, Wavelet::WaveletDirection TDirectionOfTransformation>
void SubsampleImageFilter<TInputImage, TOutputImage, TDirectionOfTransformation>::CallCopyOutputRegionToInputRegion(InputImageRegionType& destRegion,
const OutputImageRegionType& srcRegion)
{
Superclass::CallCopyOutputRegionToInputRegion(destRegion, srcRegion);
if (DirectionOfTransformation == Wavelet::INVERSE)
{
typename OutputImageRegionType::IndexType srcIndex = srcRegion.GetIndex();
typename OutputImageRegionType::SizeType srcSize = srcRegion.GetSize();
typename InputImageRegionType::IndexType destIndex;
typename InputImageRegionType::SizeType destSize;
for (unsigned int i = 0; i < InputImageDimension; ++i)
{
// TODO: This seems not right in odd index cases
destIndex[i] = srcIndex[i] / m_SubsampleFactor[i];
destSize[i] = srcSize[i] / m_SubsampleFactor[i];
}
destRegion.SetIndex(destIndex);
destRegion.SetSize(destSize);
}
}
template <class TInputImage, class TOutputImage, Wavelet::WaveletDirection TDirectionOfTransformation>
void SubsampleImageFilter<TInputImage, TOutputImage, TDirectionOfTransformation>::CallCopyInputRegionToOutputRegion(OutputImageRegionType& destRegion,
const InputImageRegionType& srcRegion)
{
Superclass::CallCopyInputRegionToOutputRegion(destRegion, srcRegion);
if (DirectionOfTransformation == Wavelet::INVERSE)
{
typename InputImageRegionType::IndexType srcIndex = srcRegion.GetIndex();
typename InputImageRegionType::SizeType srcSize = srcRegion.GetSize();
typename OutputImageRegionType::IndexType destIndex;
typename OutputImageRegionType::SizeType destSize;
for (unsigned int i = 0; i < InputImageDimension; ++i)
{
destIndex[i] = srcIndex[i] * m_SubsampleFactor[i];
destSize[i] = srcSize[i] * m_SubsampleFactor[i];
}
destRegion.SetIndex(destIndex);
destRegion.SetSize(destSize);
}
}
template <class TInputImage, class TOutputImage, Wavelet::WaveletDirection TDirectionOfTransformation>
void SubsampleImageFilter<TInputImage, TOutputImage, TDirectionOfTransformation>::BeforeThreadedGenerateData()
{
OutputImagePointerType output = this->GetOutput();
output->FillBuffer(0);
}
template <class TInputImage, class TOutputImage, Wavelet::WaveletDirection TDirectionOfTransformation>
void SubsampleImageFilter<TInputImage, TOutputImage, TDirectionOfTransformation>::ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
itk::ThreadIdType itkNotUsed(threadId))
{
OutputImagePointerType output = this->GetOutput();
SubsampledImageRegionIterator<OutputImageType> outputIter(this->GetOutput(), outputRegionForThread);
outputIter.SetSubsampleFactor(1);
outputIter.GoToBegin();
InputImageRegionType inputRegionForThread;
this->CallCopyOutputRegionToInputRegion(inputRegionForThread, outputRegionForThread);
SubsampledImageRegionConstIterator<InputImageType> inputIter(this->GetInput(), inputRegionForThread);
if (DirectionOfTransformation == Wavelet::FORWARD)
{
inputIter.SetSubsampleFactor(GetSubsampleFactor());
inputIter.GoToBegin();
while (!inputIter.IsAtEnd())
{
outputIter.SetOffset(static_cast<typename SubsampledImageRegionIterator<OutputImageType>::OffsetType>(inputIter.GetOffset()));
outputIter.Set(static_cast<OutputPixelType>(inputIter.Get()));
++inputIter;
}
}
else
{
inputIter.SetSubsampleFactor(1);
inputIter.GoToBegin();
while (!inputIter.IsAtEnd())
{
InputImageIndexType inputIndex = inputIter.GetIndex();
OutputImageIndexType outputIndex;
for (unsigned int i = 0; i < OutputImageDimension; ++i)
{
outputIndex[i] = inputIndex[i] * m_SubsampleFactor[i];
}
outputIter.SetIndex(outputIndex);
outputIter.Set(static_cast<OutputPixelType>(inputIter.Get()));
++inputIter;
}
}
}
} // end of namespace otb
#endif
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