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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 itkWhitakerSparseLevelSetImage_h
#define itkWhitakerSparseLevelSetImage_h
#include "itkLevelSetSparseImage.h"
#include "itkLabelObject.h"
#include "itkLabelMap.h"
namespace itk
{
/**
* \class WhitakerSparseLevelSetImage
* \brief Derived class for the sparse-field representation of level-set function
*
* This representation is a "sparse" level-set function, where values are
* real in between [ -3, +3 ] and organized into several layers { -2, -1,
* 0, +1, +2 }.
*
* \tparam TOutput Output type (float or double) of the level set function
* \tparam VDimension Dimension of the input space
* \ingroup ITKLevelSetsv4
*/
template <typename TOutput, unsigned int VDimension>
class ITK_TEMPLATE_EXPORT WhitakerSparseLevelSetImage : public LevelSetSparseImage<TOutput, VDimension>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(WhitakerSparseLevelSetImage);
using Self = WhitakerSparseLevelSetImage;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
using Superclass = LevelSetSparseImage<TOutput, VDimension>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(WhitakerSparseLevelSetImage);
static constexpr unsigned int Dimension = VDimension;
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 typename Superclass::LayerIdType;
using typename Superclass::LabelObjectType;
using typename Superclass::LabelObjectPointer;
using typename Superclass::LabelObjectLengthType;
using typename Superclass::LabelObjectLineType;
using typename Superclass::LabelMapType;
using typename Superclass::LabelMapPointer;
using typename Superclass::LabelMapConstPointer;
using typename Superclass::RegionType;
using typename Superclass::LayerType;
using typename Superclass::LayerIterator;
using typename Superclass::LayerConstIterator;
using typename Superclass::LayerMapType;
using typename Superclass::LayerMapIterator;
using typename Superclass::LayerMapConstIterator;
/** Returns the value of the level set function at a given location iP */
using Superclass::Evaluate;
OutputType
Evaluate(const InputType & inputIndex) const override;
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(DoubleConvertible, (Concept::Convertible<OutputRealType, OutputType>));
// End concept checking
#endif // ITK_USE_CONCEPT_CHECKING
static inline LayerIdType
MinusThreeLayer()
{
return -3;
}
static inline LayerIdType
MinusTwoLayer()
{
return -2;
}
static inline LayerIdType
MinusOneLayer()
{
return -1;
}
static inline LayerIdType
ZeroLayer()
{
return 0;
}
static inline LayerIdType
PlusOneLayer()
{
return 1;
}
static inline LayerIdType
PlusTwoLayer()
{
return 2;
}
static inline LayerIdType
PlusThreeLayer()
{
return 3;
}
/** Return the label object pointer with a given id */
template <typename TLabel>
typename LabelObject<TLabel, Dimension>::Pointer
GetAsLabelObject()
{
using OutputLabelObjectType = LabelObject<TLabel, Dimension>;
auto object = OutputLabelObjectType::New();
for (LayerIdType status = this->MinusThreeLayer(); status < this->PlusOneLayer(); ++status)
{
LabelObjectPointer labelObject = this->m_LabelMap->GetLabelObject(status);
for (SizeValueType i = 0; i < labelObject->GetNumberOfLines(); ++i)
{
object->AddLine(labelObject->GetLine(i));
}
}
object->Optimize();
return object;
}
protected:
WhitakerSparseLevelSetImage();
~WhitakerSparseLevelSetImage() override = default;
/** Initialize the sparse field layers */
void
InitializeLayers() override;
void
InitializeInternalLabelList() override;
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkWhitakerSparseLevelSetImage.hxx"
#endif
#endif // itkWhitakerSparseLevelSetImage_h
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