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/*=========================================================================
Program: ORFEO Toolbox
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
See OTBCopyright.txt for details.
Some parts of this code are derived from ITK. See ITKCopyright.txt
for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef otbStreamingImageToOGRLayerSegmentationFilter_txx
#define otbStreamingImageToOGRLayerSegmentationFilter_txx
#include "otbStreamingImageToOGRLayerSegmentationFilter.h"
#include "otbVectorDataTransformFilter.h"
#include "itkAffineTransform.h"
#include "itkTimeProbe.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;
itk::TimeProbe tileChrono;
tileChrono.Start();
// 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();
itk::TimeProbe chrono1;
chrono1.Start();
m_SegmentationFilter->SetInput(extract->GetOutput());
m_SegmentationFilter->UpdateLargestPossibleRegion();
chrono1.Stop();
otbMsgDebugMacro(<<"segmentation took " << chrono1.GetTotal() << " sec");
itk::TimeProbe chrono2;
chrono2.Start();
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();
chrono2.Stop();
otbMsgDebugMacro(<< "vectorization took " << chrono2.GetTotal() << " sec");
//Relabeling & simplication of geometries & filtering small objects
itk::TimeProbe chrono3;
chrono3.Start();
OGRDataSourcePointerType tmpDS = const_cast<OGRDataSourceType *>(labelImageToOGRDataFilter->GetOutput());
OGRLayerType tmpLayer = tmpDS->GetLayer(0);
const typename InputImageType::SpacingType inSpacing = this->GetInput()->GetSpacing();
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()->GetSpacing();
double pixelsArea = area / (vcl_abs(spacing[0]*spacing[1]));
otbMsgDebugMacro(<<"DN = "<<field.GetValue<int>()<<", area = "<<pixelsArea);
if( pixelsArea < m_MinimumObjectSize )
{
tmpLayer.DeleteFeature((*featIt).GetFID());
}
}
}
chrono3.Stop();
otbMsgDebugMacro(<< "relabeling, filtering small objects and simplifying geometries took " << chrono3.GetTotal() << " sec");
return tmpDS;
}
} // end namespace otb
#endif
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