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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* 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 itkShapeRelabelLabelMapFilter_h
#define itkShapeRelabelLabelMapFilter_h
#include "itkInPlaceLabelMapFilter.h"
#include "itkLabelObject.h"
#include "itkShapeLabelObjectAccessors.h"
#include "itkProgressReporter.h"
namespace itk
{
/**
* \class ShapeRelabelLabelMapFilter
* \brief Relabels objects according to their shape attributes.
*
* The ShapeRelabelImageFilter relabels a label collection image according
* to the shape attributes of the objects. The label produced are always
* consecutive.
*
* This implementation was taken from the Insight Journal paper:
* https://www.insight-journal.org/browse/publication/176
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \sa ShapeLabelObject, RelabelComponentImageFilter
* \ingroup ImageEnhancement MathematicalMorphologyImageFilters
* \ingroup ITKLabelMap
*/
template <typename TImage>
class ITK_TEMPLATE_EXPORT ShapeRelabelLabelMapFilter : public InPlaceLabelMapFilter<TImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(ShapeRelabelLabelMapFilter);
/** Standard class type aliases. */
using Self = ShapeRelabelLabelMapFilter;
using Superclass = InPlaceLabelMapFilter<TImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Some convenient type alias. */
using ImageType = TImage;
using ImagePointer = typename ImageType::Pointer;
using ImageConstPointer = typename ImageType::ConstPointer;
using PixelType = typename ImageType::PixelType;
using IndexType = typename ImageType::IndexType;
using LabelObjectType = typename ImageType::LabelObjectType;
using AttributeType = typename LabelObjectType::AttributeType;
/** ImageDimension constants */
static constexpr unsigned int ImageDimension = TImage::ImageDimension;
/** Standard New method. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(ShapeRelabelLabelMapFilter);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
/* itkConceptMacro(InputEqualityComparableCheck,
(Concept::EqualityComparable<InputImagePixelType>));
itkConceptMacro(IntConvertibleToInputCheck,
(Concept::Convertible<int, InputImagePixelType>));
itkConceptMacro(InputOStreamWritableCheck,
(Concept::OStreamWritable<InputImagePixelType>));*/
// End concept checking
#endif
/**
* Set/Get the order of labeling of the objects. By default, the objects with
* the highest attribute values are labeled first. Setting ReverseOrdering to true
* causes the object with the smallest attributes to be labeled first.
*/
itkSetMacro(ReverseOrdering, bool);
itkGetConstReferenceMacro(ReverseOrdering, bool);
itkBooleanMacro(ReverseOrdering);
/**
* Set/Get the attribute to use.
* Default is "Size".
*/
itkGetConstMacro(Attribute, AttributeType);
itkSetMacro(Attribute, AttributeType);
void
SetAttribute(const std::string & s)
{
this->SetAttribute(LabelObjectType::GetAttributeFromName(s));
}
protected:
ShapeRelabelLabelMapFilter();
~ShapeRelabelLabelMapFilter() override = default;
void
GenerateData() override;
template <typename TAttributeAccessor>
void
TemplatedGenerateData(const TAttributeAccessor &)
{
// Allocate the output
this->AllocateOutputs();
ImageType * output = this->GetOutput();
using LabelObjectPointer = typename LabelObjectType::Pointer;
using VectorType = std::vector<LabelObjectPointer>;
ProgressReporter progress(this, 0, 2 * output->GetNumberOfLabelObjects());
// Get the label objects in a vector, so they can be sorted
VectorType labelObjects;
labelObjects.reserve(output->GetNumberOfLabelObjects());
for (typename ImageType::Iterator it(output); !it.IsAtEnd(); ++it)
{
labelObjects.push_back(it.GetLabelObject());
progress.CompletedPixel();
}
// Instantiate the comparator and sort the vector
if (m_ReverseOrdering)
{
std::sort(labelObjects.begin(),
labelObjects.end(),
Functor::LabelObjectReverseComparator<LabelObjectType, TAttributeAccessor>());
}
else
{
std::sort(labelObjects.begin(),
labelObjects.end(),
Functor::LabelObjectComparator<LabelObjectType, TAttributeAccessor>());
}
// progress.CompletedPixel();
// and put back the objects in the map
output->ClearLabels();
PixelType label{};
typename VectorType::const_iterator it2 = labelObjects.begin();
while (it2 != labelObjects.end())
{
// Avoid the background label if it is used
if (label == output->GetBackgroundValue())
{
++label;
}
(*it2)->SetLabel(label);
output->AddLabelObject(*it2);
// Go to the next label
++label;
progress.CompletedPixel();
++it2;
}
}
void
PrintSelf(std::ostream & os, Indent indent) const override;
bool m_ReverseOrdering{};
AttributeType m_Attribute{};
}; // end of class
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkShapeRelabelLabelMapFilter.hxx"
#endif
#endif
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