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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 itkMergeLabelMapFilter_h
#define itkMergeLabelMapFilter_h
#include "itkInPlaceLabelMapFilter.h"
#include "ITKLabelMapExport.h"
namespace itk
{
// See https://docs.microsoft.com/en-us/cpp/error-messages/compiler-errors-1/compiler-error-c2059?view=vs-2019
#ifdef STRICT
# define TEMPINPLACELABELMAPSTRICT STRICT
# undef STRICT
#endif
/** \class MergeLabelMapFilterEnums
* \brief Contains all enum classes used by MergeLabelMapFilter class.
* \ingroup ITKLabelMap
*/
class MergeLabelMapFilterEnums
{
public:
/** \class ChoiceMethod
* \ingroup ITKLabelMap
*/
enum class ChoiceMethod : uint8_t
{
KEEP = 0,
AGGREGATE = 1,
PACK = 2,
STRICT = 3
};
};
// Define how to print enumeration
extern ITKLabelMap_EXPORT std::ostream &
operator<<(std::ostream & out, const MergeLabelMapFilterEnums::ChoiceMethod value);
using ChoiceMethodEnum = MergeLabelMapFilterEnums::ChoiceMethod;
#if !defined(ITK_LEGACY_REMOVE)
/** Enables backwards compatibility for enum values */
using ChoiceMethod = ChoiceMethodEnum;
// We need to expose the enum values at the class level
// for backwards compatibility
static constexpr ChoiceMethodEnum KEEP = ChoiceMethodEnum::KEEP;
static constexpr ChoiceMethodEnum AGGREGATE = ChoiceMethodEnum::AGGREGATE;
static constexpr ChoiceMethodEnum PACK = ChoiceMethodEnum::PACK;
static constexpr ChoiceMethodEnum STRICT = ChoiceMethodEnum::STRICT;
#endif
#ifdef TEMPINPLACELABELMAPSTRICT
# define STRICT TEMPINPLACELABELMAPSTRICT
# undef TEMPINPLACELABELMAPSTRICT
#endif
/**
* \class MergeLabelMapFilter
* \brief Merges several Label Maps
*
* This filter takes one or more input Label Map and merges them.
*
* SetMethod() can be used to change how the filter manage the
* labels from the different label maps.
* KEEP (0): MergeLabelMapFilter do its best to keep the label unchanged,
* but if a label is already used in a previous label map, a new
* label is assigned.
* AGGREGATE (1): If the same label is found several times in the label maps,
* the label objects with the same label are merged.
* PACK (2): MergeLabelMapFilter relabel all the label objects by order of
* processing. No conflict can occur.
* STRICT (3): MergeLabelMapFilter keeps the labels unchanged and raises an
* exception if the same label is found in several images.
*
* 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
*
* \sphinx
* \sphinxexample{Filtering/LabelMap/MergeLabelMaps,Merge LabelMaps}
* \endsphinx
*/
template <typename TImage>
class ITK_TEMPLATE_EXPORT MergeLabelMapFilter : public InPlaceLabelMapFilter<TImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(MergeLabelMapFilter);
/** Standard class type aliases. */
using Self = MergeLabelMapFilter;
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 LabelObjectPointer = typename LabelObjectType::Pointer;
/** ImageDimension constants */
static constexpr unsigned int ImageDimension = TImage::ImageDimension;
/** Standard New method. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(MergeLabelMapFilter);
#if !defined(ITK_LEGACY_REMOVE)
/** Enables backwards compatibility for enum values */
using MethodChoice = ChoiceMethodEnum;
#endif
#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
#ifdef STRICT
# undef STRICT
#endif
/** Set/Get the method used to merge the label maps */
itkSetMacro(Method, ChoiceMethodEnum);
itkGetConstReferenceMacro(Method, ChoiceMethodEnum);
protected:
MergeLabelMapFilter();
~MergeLabelMapFilter() override = default;
void
GenerateData() override;
void
PrintSelf(std::ostream & os, Indent indent) const override;
ChoiceMethodEnum m_Method{};
private:
void
MergeWithKeep();
void
MergeWithAggregate();
void
MergeWithPack();
void
MergeWithStrict();
}; // end of class
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkMergeLabelMapFilter.hxx"
#endif
#endif
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