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/*
* Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
*
* 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 otbStreamingShrinkImageFilter_hxx
#define otbStreamingShrinkImageFilter_hxx
#include "otbStreamingShrinkImageFilter.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "otbMacro.h"
#include "itkProgressReporter.h"
namespace otb
{
template <class TImage>
StreamingShrinkStreamingManager<TImage>::StreamingShrinkStreamingManager() : m_ShrinkFactor(10)
{
}
template <class TImage>
StreamingShrinkStreamingManager<TImage>::~StreamingShrinkStreamingManager()
{
}
template <class TImage>
void StreamingShrinkStreamingManager<TImage>::PrepareStreaming(itk::DataObject* input, const RegionType& region)
{
typedef otb::StreamingShrinkImageRegionSplitter TileSplitterType;
TileSplitterType::Pointer splitter = TileSplitterType::New();
splitter->SetShrinkFactor(m_ShrinkFactor);
this->m_Splitter = splitter;
unsigned long nbDivisions = this->EstimateOptimalNumberOfDivisions(input, region, 0);
this->m_ComputedNumberOfSplits = this->m_Splitter->GetNumberOfSplits(region, nbDivisions);
otbMsgDevMacro(<< "Number of split : " << this->m_ComputedNumberOfSplits)
// Save the region to generate the splits later
this->m_Region = region;
}
/** Constructor */
template <class TInputImage, class TOutputImage>
PersistentShrinkImageFilter<TInputImage, TOutputImage>::PersistentShrinkImageFilter() : m_ShrinkFactor(10)
{
this->SetNumberOfRequiredInputs(1);
this->SetNumberOfRequiredOutputs(1);
}
/** Destructor */
template <class TInputImage, class TOutputImage>
PersistentShrinkImageFilter<TInputImage, TOutputImage>::~PersistentShrinkImageFilter()
{
}
template <class TInputImage, class TOutputImage>
void PersistentShrinkImageFilter<TInputImage, TOutputImage>::GenerateOutputInformation()
{
Superclass::GenerateOutputInformation();
const InputImageType* input = this->GetInput();
OutputImageType* output = this->GetOutput();
if (input)
{
output->CopyInformation(input);
output->SetLargestPossibleRegion(input->GetLargestPossibleRegion());
if (output->GetRequestedRegion().GetNumberOfPixels() == 0)
{
output->SetRequestedRegion(output->GetLargestPossibleRegion());
}
}
}
template <class TInputImage, class TOutputImage>
void PersistentShrinkImageFilter<TInputImage, TOutputImage>::AllocateOutputs()
{
// This is commented to prevent the streaming of the whole image for the first stream strip
// It shall not cause any problem because the output image of this filter is not intended to be used.
// InputImagePointer image = const_cast< TInputImage * >( this->GetInput() );
// this->GraftOutput( image );
// Nothing that needs to be allocated for the remaining outputs
}
template <class TInputImage, class TOutputImage>
void PersistentShrinkImageFilter<TInputImage, TOutputImage>::Reset()
{
// Get pointers to the input and output
InputImageType* inputPtr = const_cast<InputImageType*>(this->GetInput());
inputPtr->UpdateOutputInformation();
m_ShrunkOutput = OutputImageType::New();
m_ShrunkOutput->CopyInformation(inputPtr);
const typename InputImageType::SpacingType& inputSpacing = inputPtr->GetSignedSpacing();
const typename InputImageType::SizeType& inputSize = inputPtr->GetLargestPossibleRegion().GetSize();
const typename InputImageType::IndexType& inputIndex = inputPtr->GetLargestPossibleRegion().GetIndex();
typename InputImageType::IndexType startIndex;
typename OutputImageType::SpacingType shrunkOutputSpacing;
typename OutputImageType::RegionType shrunkOutputLargestPossibleRegion;
typename OutputImageType::SizeType shrunkOutputSize;
typename OutputImageType::IndexType shrunkOutputStartIndex;
typename OutputImageType::PointType shrunkOutputOrigin;
for (unsigned int i = 0; i < OutputImageType::ImageDimension; ++i)
{
startIndex[i] = inputIndex[i] + (m_ShrinkFactor - 1) / 2;
if (m_ShrinkFactor > inputSize[i])
startIndex[i] = inputIndex[i] + (inputSize[i] - 1) / 2;
m_Offset[i] = startIndex[i] % m_ShrinkFactor;
shrunkOutputSpacing[i] = inputSpacing[i] * static_cast<double>(m_ShrinkFactor);
shrunkOutputSize[i] = inputSize[i] > m_ShrinkFactor ? inputSize[i] / m_ShrinkFactor : 1;
shrunkOutputOrigin[i] = inputPtr->GetOrigin()[i] + inputSpacing[i] * startIndex[i];
// we choose to output a region with a start index [0,0]
// the origin is set accordingly
shrunkOutputStartIndex[i] = 0;
}
m_ShrunkOutput->SetSignedSpacing(shrunkOutputSpacing);
m_ShrunkOutput->SetOrigin(shrunkOutputOrigin);
shrunkOutputLargestPossibleRegion.SetSize(shrunkOutputSize);
shrunkOutputLargestPossibleRegion.SetIndex(shrunkOutputStartIndex);
m_ShrunkOutput->SetRegions(shrunkOutputLargestPossibleRegion);
m_ShrunkOutput->Allocate();
}
template <class TInputImage, class TOutputImage>
void PersistentShrinkImageFilter<TInputImage, TOutputImage>::Synthetize()
{
}
template <class TInputImage, class TOutputImage>
void PersistentShrinkImageFilter<TInputImage, TOutputImage>::BeforeThreadedGenerateData()
{
}
template <class TInputImage, class TOutputImage>
void PersistentShrinkImageFilter<TInputImage, TOutputImage>::ThreadedGenerateData(const RegionType& outputRegionForThread, itk::ThreadIdType threadId)
{
// std::cout << "outputRegionForThread " << threadId << " " << outputRegionForThread << std::endl;
itk::ProgressReporter progress(this, threadId, outputRegionForThread.GetNumberOfPixels());
const InputImageType* inputPtr = this->GetInput();
itk::ImageRegionConstIteratorWithIndex<InputImageType> inIt(inputPtr, outputRegionForThread);
for (inIt.GoToBegin(); !inIt.IsAtEnd(); ++inIt, progress.CompletedPixel())
{
const IndexType& inIndex = inIt.GetIndex();
// TODO the pixel value should be taken near the centre of the cell, not at the corners
if ((inIndex[0] - m_Offset[0]) % m_ShrinkFactor == 0 && (inIndex[1] - m_Offset[1]) % m_ShrinkFactor == 0)
{
IndexType shrunkIndex;
shrunkIndex[0] = (inIndex[0] - m_Offset[0]) / m_ShrinkFactor;
shrunkIndex[1] = (inIndex[1] - m_Offset[1]) / m_ShrinkFactor;
if (m_ShrunkOutput->GetLargestPossibleRegion().IsInside(shrunkIndex))
m_ShrunkOutput->SetPixel(shrunkIndex, inIt.Get());
}
}
}
template <class TInputImage, class TOutputImage>
void PersistentShrinkImageFilter<TInputImage, TOutputImage>::AfterThreadedGenerateData()
{
}
template <class TImage, class TOutputImage>
void PersistentShrinkImageFilter<TImage, TOutputImage>::PrintSelf(std::ostream& os, itk::Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Shrink factor: " << m_ShrinkFactor << std::endl;
}
} // End namespace otb
#endif
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