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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 otbMeanShiftConnectedComponentSegmentationFilter_hxx
#define otbMeanShiftConnectedComponentSegmentationFilter_hxx
#include "otbMeanShiftConnectedComponentSegmentationFilter.h"
#include "itkExtractImageFilter.h"
namespace otb
{
template <class TVImage, class TMaskImage, class TLabelImage>
MeanShiftConnectedComponentSegmentationFilter<TVImage, TMaskImage, TLabelImage>::MeanShiftConnectedComponentSegmentationFilter()
{
m_MinimumObjectSize = 2;
m_MeanShiftFilter = MeanShiftFilterType::New();
}
template <class TVImage, class TMaskImage, class TLabelImage>
MeanShiftConnectedComponentSegmentationFilter<TVImage, TMaskImage, TLabelImage>::~MeanShiftConnectedComponentSegmentationFilter()
{
}
template <class TVImage, class TMaskImage, class TLabelImage>
void MeanShiftConnectedComponentSegmentationFilter<TVImage, TMaskImage, TLabelImage>::GenerateInputRequestedRegion()
{
Superclass::GenerateInputRequestedRegion();
}
template <class TVImage, class TMaskImage, class TLabelImage>
void MeanShiftConnectedComponentSegmentationFilter<TVImage, TMaskImage, TLabelImage>::GenerateData()
{
// Apply an ExtractImageFilter to avoid problems with filters asking for the LargestPossibleRegion
typedef itk::ExtractImageFilter<TVImage, TVImage> ExtractImageFilterType;
typename ExtractImageFilterType::Pointer extract = ExtractImageFilterType::New();
extract->SetInput(this->GetInput());
extract->SetExtractionRegion(this->GetOutput()->GetRequestedRegion());
// WARNING: itk::ExtractImageFilter does not copy the MetadataDictionary
// meanshift filtering
// not necessary
/* if (this->m_MeanShiftFilter.IsNotNull())
{
itkExceptionMacro("MeanShiftFilter is null");
}*/
this->m_MeanShiftFilter->SetInput(extract->GetOutput());
// this->m_MeanShiftFilter->SetInput(this->GetInput());
typename MaskImageType::Pointer mask;
if (!m_MaskExpression.empty())
{
// Compute the mask
typename MaskMuParserFilterType::Pointer maskFilter;
maskFilter = MaskMuParserFilterType::New();
maskFilter->SetInput(this->m_MeanShiftFilter->GetOutput());
maskFilter->SetExpression(m_MaskExpression);
maskFilter->Update();
mask = maskFilter->GetOutput();
}
// Perform connected components segmentation
typename ConnectedComponentFilterType::Pointer connected = ConnectedComponentFilterType::New();
connected->SetInput(this->m_MeanShiftFilter->GetOutput());
if (mask.IsNotNull())
connected->SetMaskImage(mask);
connected->GetFunctor().SetExpression(m_ConnectedComponentExpression);
connected->Update();
// Relabel connected component output
typename RelabelComponentFilterType::Pointer relabel = RelabelComponentFilterType::New();
relabel->SetInput(connected->GetOutput());
relabel->SetMinimumObjectSize(m_MinimumObjectSize);
relabel->Update();
this->GraftOutput(relabel->GetOutput());
}
} // end namespace otb
#endif
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