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/*
* Copyright (C) 1999-2011 Insight Software Consortium
* Copyright (C) 2005-2017 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 otbStreamingImageToOGRLayerSegmentationFilter_txx
#define otbStreamingImageToOGRLayerSegmentationFilter_txx
#include "otbStreamingImageToOGRLayerSegmentationFilter.h"
#include "otbVectorDataTransformFilter.h"
#include "itkAffineTransform.h"
#include "otbStopwatch.h"
#include "otbMacro.h"
#include <cassert>
namespace otb
{
template <class TImageType, class TSegmentationFilter>
PersistentImageToOGRLayerSegmentationFilter<TImageType, TSegmentationFilter>
::PersistentImageToOGRLayerSegmentationFilter() : m_TileMaxLabel(0), m_StartLabel(0), m_SegmentationFilter(), m_FieldName("DN"), m_Use8Connected(false),
m_FilterSmallObject(false), m_MinimumObjectSize(1),m_Simplify(false), m_SimplificationTolerance(0.3)
{
this->SetNumberOfRequiredInputs(2);
this->SetNumberOfRequiredInputs(1);
m_SegmentationFilter = SegmentationFilterType::New();
m_TileNumber = 1;
}
template <class TImageType, class TSegmentationFilter>
PersistentImageToOGRLayerSegmentationFilter<TImageType, TSegmentationFilter>
::~PersistentImageToOGRLayerSegmentationFilter()
{
}
template <class TImageType, class TSegmentationFilter>
void
PersistentImageToOGRLayerSegmentationFilter<TImageType, TSegmentationFilter>
::SetInputMask(const LabelImageType *mask)
{
this->itk::ProcessObject::SetNthInput(1, const_cast<LabelImageType *>(mask));
}
template <class TImageType, class TSegmentationFilter>
const typename PersistentImageToOGRLayerSegmentationFilter<TImageType, TSegmentationFilter>
::LabelImageType *
PersistentImageToOGRLayerSegmentationFilter<TImageType, TSegmentationFilter>
::GetInputMask(void)
{
return static_cast<const LabelImageType *>(this->itk::ProcessObject::GetInput(1));
}
template <class TImageType, class TSegmentationFilter>
typename PersistentImageToOGRLayerSegmentationFilter<TImageType, TSegmentationFilter>::OGRDataSourcePointerType
PersistentImageToOGRLayerSegmentationFilter<TImageType, TSegmentationFilter>
::ProcessTile()
{
otbMsgDebugMacro(<< "tile number : " << m_TileNumber);
++m_TileNumber;
// Apply an ExtractImageFilter to avoid problems with filters asking for the LargestPossibleRegion
typedef itk::ExtractImageFilter<InputImageType, InputImageType> ExtractImageFilterType;
typename ExtractImageFilterType::Pointer extract = ExtractImageFilterType::New();
extract->SetInput( this->GetInput() );
extract->SetExtractionRegion( this->GetInput()->GetRequestedRegion() );
extract->Update();
// WARNING: itk::ExtractImageFilter does not copy the MetadataDictionary
extract->GetOutput()->SetMetaDataDictionary(this->GetInput()->GetMetaDataDictionary());
const unsigned int labelImageIndex = LabeledOutputAccessor<SegmentationFilterType>::LabeledOutputIndex;
typename LabelImageToOGRDataSourceFilterType::Pointer labelImageToOGRDataFilter =
LabelImageToOGRDataSourceFilterType::New();
otb::Stopwatch chrono = otb::Stopwatch::StartNew();
m_SegmentationFilter->SetInput(extract->GetOutput());
m_SegmentationFilter->UpdateLargestPossibleRegion();
otbMsgDebugMacro(<<"segmentation took " << chrono.GetElapsedMilliseconds() / 1000 << " sec");
chrono.Restart();
typename LabelImageType::ConstPointer inputMask = this->GetInputMask();
if (!inputMask.IsNull())
{
// Apply an ExtractImageFilter to avoid problems with filters asking for the LargestPossibleRegion
typedef itk::ExtractImageFilter<LabelImageType, LabelImageType> ExtractLabelImageFilterType;
typename ExtractLabelImageFilterType::Pointer maskExtract = ExtractLabelImageFilterType::New();
maskExtract->SetInput( this->GetInputMask() );
maskExtract->SetExtractionRegion( this->GetInput()->GetRequestedRegion() );
maskExtract->Update();
// WARNING: itk::ExtractImageFilter does not copy the MetadataDictionary
maskExtract->GetOutput()->SetMetaDataDictionary(this->GetInputMask()->GetMetaDataDictionary());
labelImageToOGRDataFilter->SetInputMask(maskExtract->GetOutput());
}
labelImageToOGRDataFilter->SetInput(dynamic_cast<LabelImageType *>(m_SegmentationFilter->GetOutputs().at(labelImageIndex).GetPointer()));
labelImageToOGRDataFilter->SetFieldName(m_FieldName);
labelImageToOGRDataFilter->SetUse8Connected(m_Use8Connected);
labelImageToOGRDataFilter->Update();
otbMsgDebugMacro(<< "vectorization took " << chrono.GetElapsedMilliseconds() / 1000 << " sec");
//Relabeling & simplication of geometries & filtering small objects
chrono.Restart();
OGRDataSourcePointerType tmpDS = const_cast<OGRDataSourceType *>(labelImageToOGRDataFilter->GetOutput());
OGRLayerType tmpLayer = tmpDS->GetLayer(0);
const typename InputImageType::SpacingType inSpacing = this->GetInput()->GetSignedSpacing();
const double tol = m_SimplificationTolerance * std::max(vcl_abs(inSpacing[0]),vcl_abs(inSpacing[1]));
typename OGRLayerType::iterator featIt = tmpLayer.begin();
for(featIt = tmpLayer.begin(); featIt!=tmpLayer.end(); ++featIt)
{
ogr::Field field = (*featIt)[0];
// field.Unset();
field.SetValue(m_TileMaxLabel);
m_TileMaxLabel++;
//Simplify the geometry
if (m_Simplify)
{
const OGRGeometry * geom = (*featIt).GetGeometry();
assert(geom && "geometry is NULL ! Can't simplify it.");
(*featIt).SetGeometryDirectly(ogr::Simplify(*geom,tol));
}
//Need to rewrite the feature otherwise changes are not considered.
tmpLayer.SetFeature(*featIt);
//Filter small objects.
if(m_FilterSmallObject)
{
double area = static_cast<const OGRPolygon *>((*featIt).GetGeometry())->get_Area();
//convert into pixel coordinates
typename InputImageType::SpacingType spacing = this->GetInput()->GetSignedSpacing();
double pixelsArea = area / (vcl_abs(spacing[0]*spacing[1]));
otbMsgDebugMacro(<<"DN = "<<field.GetValue<int>()<<", area = "<<pixelsArea);
if( pixelsArea < m_MinimumObjectSize )
{
tmpLayer.DeleteFeature((*featIt).GetFID());
}
}
}
chrono.Stop();
otbMsgDebugMacro(<< "relabeling, filtering small objects and simplifying geometries took " << chrono.GetElapsedMilliseconds() / 1000 << " sec");
return tmpDS;
}
} // end namespace otb
#endif
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