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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 itkLevelSetSparseImage_h
#define itkLevelSetSparseImage_h
#include "itkDiscreteLevelSetImage.h"
#include "itkObjectFactory.h"
#include "itkLabelObject.h"
#include "itkLabelMap.h"
#include "itkLexicographicCompare.h"
namespace itk
{
/**
* \class LevelSetSparseImage
* \brief Base class for the sparse representation of a level-set function on one Image.
*
* \tparam TImage Input image type of the level set function
* \todo Think about using image iterators instead of GetPixel()
*
* \ingroup ITKLevelSetsv4
*/
template <typename TOutput, unsigned int VDimension>
class ITK_TEMPLATE_EXPORT LevelSetSparseImage : public DiscreteLevelSetImage<TOutput, VDimension>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(LevelSetSparseImage);
using Self = LevelSetSparseImage;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
using Superclass = DiscreteLevelSetImage<TOutput, VDimension>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(LevelSetSparseImage);
static constexpr unsigned int Dimension = Superclass::Dimension;
using typename Superclass::InputType;
using typename Superclass::OutputType;
using typename Superclass::OutputRealType;
using typename Superclass::GradientType;
using typename Superclass::HessianType;
using typename Superclass::LevelSetDataType;
using LayerIdType = int8_t;
using LayerIdListType = std::list<LayerIdType>;
using LabelObjectType = LabelObject<LayerIdType, VDimension>;
using LabelObjectPointer = typename LabelObjectType::Pointer;
using LabelObjectLengthType = typename LabelObjectType::LengthType;
using LabelObjectLineType = typename LabelObjectType::LineType;
using LabelMapType = LabelMap<LabelObjectType>;
using LabelMapPointer = typename LabelMapType::Pointer;
using LabelMapConstPointer = typename LabelMapType::ConstPointer;
using RegionType = typename LabelMapType::RegionType;
using LayerType = std::map<InputType, OutputType, Functor::LexicographicCompare>;
using LayerIterator = typename LayerType::iterator;
using LayerConstIterator = typename LayerType::const_iterator;
using LayerMapType = std::map<LayerIdType, LayerType>;
using LayerMapIterator = typename LayerMapType::iterator;
using LayerMapConstIterator = typename LayerMapType::const_iterator;
/** Returns the layer affiliation of a given location inputIndex */
virtual LayerIdType
Status(const InputType & inputIndex) const;
/** Return the const reference to a layer map with given id */
const LayerType &
GetLayer(LayerIdType value) const;
/** Return the pointer to a layer map with given id */
LayerType &
GetLayer(LayerIdType value);
/** Set a layer map with id to the given layer pointer */
void
SetLayer(LayerIdType value, const LayerType & layer);
/** Set/Get the label map for computing the sparse representation */
virtual void
SetLabelMap(LabelMapType * labelMap);
itkGetModifiableObjectMacro(LabelMap, LabelMapType);
/** Graft data object as level set object */
void
Graft(const DataObject * data) override;
/** Return the label object pointer with a given id */
template <typename TLabel>
typename LabelObject<TLabel, VDimension>::Pointer
GetAsLabelObject();
protected:
LevelSetSparseImage() = default;
~LevelSetSparseImage() override = default;
LayerMapType m_Layers{};
LabelMapPointer m_LabelMap{};
LayerIdListType m_InternalLabelList{};
/** Initialize the sparse field layers */
virtual void
InitializeLayers() = 0;
virtual void
InitializeInternalLabelList() = 0;
bool
IsInsideDomain(const InputType & inputIndex) const override;
/** Initialize the label map point and the sparse-field layers */
void
Initialize() override;
/** Copy level set information from data object */
void
CopyInformation(const DataObject * data) override;
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkLevelSetSparseImage.hxx"
#endif
#endif // itkLevelSetSparseImage_h
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