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/*
* Copyright (C) 2005-2022 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 otbSOMImageClassificationFilter_hxx
#define otbSOMImageClassificationFilter_hxx
#include "otbSOMImageClassificationFilter.h"
#include "itkImageRegionIterator.h"
#include "itkNumericTraits.h"
namespace otb
{
/**
* Constructor
*/
template <class TInputImage, class TOutputImage, class TSOMMap, class TMaskImage>
SOMImageClassificationFilter<TInputImage, TOutputImage, TSOMMap, TMaskImage>::SOMImageClassificationFilter()
{
this->SetNumberOfRequiredInputs(2);
this->SetNumberOfRequiredInputs(1);
m_DefaultLabel = itk::NumericTraits<LabelType>::ZeroValue();
}
template <class TInputImage, class TOutputImage, class TSOMMap, class TMaskImage>
void SOMImageClassificationFilter<TInputImage, TOutputImage, TSOMMap, TMaskImage>::SetInputMask(const MaskImageType* mask)
{
this->itk::ProcessObject::SetNthInput(1, const_cast<MaskImageType*>(mask));
}
template <class TInputImage, class TOutputImage, class TSOMMap, class TMaskImage>
const typename SOMImageClassificationFilter<TInputImage, TOutputImage, TSOMMap, TMaskImage>::MaskImageType*
SOMImageClassificationFilter<TInputImage, TOutputImage, TSOMMap, TMaskImage>::GetInputMask()
{
if (this->GetNumberOfInputs() < 2)
{
return nullptr;
}
return static_cast<const MaskImageType*>(this->itk::ProcessObject::GetInput(1));
}
template <class TInputImage, class TOutputImage, class TSOMMap, class TMaskImage>
void SOMImageClassificationFilter<TInputImage, TOutputImage, TSOMMap, TMaskImage>::BeforeThreadedGenerateData()
{
if (!m_Map)
{
itkGenericExceptionMacro(<< "No model for classification");
}
}
template <class TInputImage, class TOutputImage, class TSOMMap, class TMaskImage>
void SOMImageClassificationFilter<TInputImage, TOutputImage, TSOMMap, TMaskImage>::ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
itk::ThreadIdType itkNotUsed(threadId))
{
InputImageConstPointerType inputPtr = this->GetInput();
MaskImageConstPointerType inputMaskPtr = this->GetInputMask();
OutputImagePointerType outputPtr = this->GetOutput();
typedef itk::ImageRegionConstIterator<InputImageType> InputIteratorType;
typedef itk::ImageRegionConstIterator<MaskImageType> MaskIteratorType;
typedef itk::ImageRegionIterator<OutputImageType> OutputIteratorType;
ListSamplePointerType listSample = ListSampleType::New();
listSample->SetMeasurementVectorSize(inputPtr->GetNumberOfComponentsPerPixel());
InputIteratorType inIt(inputPtr, outputRegionForThread);
MaskIteratorType maskIt;
if (inputMaskPtr)
{
maskIt = MaskIteratorType(inputMaskPtr, outputRegionForThread);
maskIt.GoToBegin();
}
unsigned int maxDimension = m_Map->GetNumberOfComponentsPerPixel();
unsigned int sampleSize = std::min(inputPtr->GetNumberOfComponentsPerPixel(), maxDimension);
bool validPoint = true;
for (inIt.GoToBegin(); !inIt.IsAtEnd(); ++inIt)
{
if (inputMaskPtr)
{
validPoint = maskIt.Get() > 0;
++maskIt;
}
if (validPoint)
{
SampleType sample;
sample.SetSize(sampleSize);
sample.Fill(itk::NumericTraits<ValueType>::ZeroValue());
for (unsigned int i = 0; i < sampleSize; ++i)
{
sample[i] = inIt.Get()[i];
}
listSample->PushBack(sample);
}
}
ClassifierPointerType classifier = ClassifierType::New();
classifier->SetMap(m_Map);
classifier->SetSample(listSample);
classifier->Update();
typename ClassifierType::OutputType::Pointer membershipSample = classifier->GetOutput();
typename ClassifierType::OutputType::ConstIterator sampleIter = membershipSample->Begin();
typename ClassifierType::OutputType::ConstIterator sampleLast = membershipSample->End();
OutputIteratorType outIt(outputPtr, outputRegionForThread);
outIt.GoToBegin();
while (!outIt.IsAtEnd() && (sampleIter != sampleLast))
{
outIt.Set(m_DefaultLabel);
++outIt;
}
outIt.GoToBegin();
if (inputMaskPtr)
{
maskIt.GoToBegin();
}
validPoint = true;
while (!outIt.IsAtEnd() && (sampleIter != sampleLast))
{
if (inputMaskPtr)
{
validPoint = maskIt.Get() > 0;
++maskIt;
}
if (validPoint)
{
outIt.Set(sampleIter.GetClassLabel());
++sampleIter;
}
++outIt;
}
}
/**
* PrintSelf Method
*/
template <class TInputImage, class TOutputImage, class TSOMMap, class TMaskImage>
void SOMImageClassificationFilter<TInputImage, TOutputImage, TSOMMap, TMaskImage>::PrintSelf(std::ostream& os, itk::Indent indent) const
{
Superclass::PrintSelf(os, indent);
}
} // End namespace otb
#endif
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