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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 itkLevelSetNeighborhoodExtractor_h
#define itkLevelSetNeighborhoodExtractor_h
#include "itkLightProcessObject.h"
#include "itkLevelSet.h"
#include "itkIndex.h"
namespace itk
{
/** \class LevelSetNeighborhoodExtractor
* \brief Locate pixels of a particular level set.
*
* LevelSetNeighborhoodExtractor locates a particular level set in the input
* level set. Specifically, the method Locate() fills two containers: one
* containing pixels immediately inside the contour defined by the level set
* and the other containing pixels immediately outside. For each located
* pixel, an estimated distance to the particular level set is also
* calculated.
*
* The containers InsidePoints and OutsidePoints can then be used
* in FastMarchingImageFilter to produce a signed distance map from
* the specified level set.
*
* This class is templated over the image type representing
* the level set.
*
* This class supports narrowbanding. If a input narrowband is
* provided, the algorithm will only search pixels within the
* narrowband.
*
* Implementation of this class is based on Chapter 11 of
* "Level Set Methods and Fast Marching Methods", J.A. Sethian,
* Cambridge Press, Second edition, 1999.
*
* \ingroup LevelSetSegmentation
*
* \ingroup ITKLevelSets
*/
template <typename TLevelSet>
class ITK_TEMPLATE_EXPORT LevelSetNeighborhoodExtractor : public LightProcessObject
{
public:
ITK_DISALLOW_COPY_AND_MOVE(LevelSetNeighborhoodExtractor);
/** Standard class typedefs. */
using Self = LevelSetNeighborhoodExtractor;
using Superclass = LightProcessObject;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(LevelSetNeighborhoodExtractor);
/** LevelSetType type alias support */
using LevelSetType = LevelSetTypeDefault<TLevelSet>;
using LevelSetImageType = typename LevelSetType::LevelSetImageType;
using LevelSetPointer = typename LevelSetType::LevelSetPointer;
using LevelSetConstPointer = typename LevelSetType::LevelSetConstPointer;
using PixelType = typename LevelSetType::PixelType;
using NodeType = typename LevelSetType::NodeType;
using NodeContainer = typename LevelSetType::NodeContainer;
using NodeContainerPointer = typename LevelSetType::NodeContainerPointer;
/** SetDimension enumeration. */
static constexpr unsigned int SetDimension = LevelSetType::SetDimension;
/** Index type alias support */
using IndexType = Index<Self::SetDimension>;
/** Get/Set the input level set. */
itkSetConstObjectMacro(InputLevelSet, LevelSetImageType);
itkGetConstObjectMacro(InputLevelSet, LevelSetImageType);
/** Set the value of the level set to be located. Default is 0. */
itkSetMacro(LevelSetValue, double);
/** Get the value of the level set to be located. */
itkGetConstMacro(LevelSetValue, double);
/** Set the narrow band width. Default is 12. */
itkSetClampMacro(NarrowBandwidth, double, 0.0, NumericTraits<double>::max());
/** Get the narrow band width. */
itkGetConstMacro(NarrowBandwidth, double);
/** Set the narrowbanding flag. */
itkSetMacro(NarrowBanding, bool);
/** Get the narrowbanding flag. */
itkGetConstMacro(NarrowBanding, bool);
itkBooleanMacro(NarrowBanding);
/** Set/Get the input narrowband. A narrowband is represented as
* a VectorContainer of LevelSetNodes. */
void
SetInputNarrowBand(NodeContainer * ptr);
itkGetModifiableObjectMacro(InputNarrowBand, NodeContainer);
/** Get the container of inside points. The inside points are
* stored in a VectorContainer of LevelSetNodes. */
NodeContainerPointer
GetInsidePoints()
{
return m_InsidePoints;
}
/** Get the container of outside points. The outside points are
* stored in a VectorContainer of LevelSetNodes. */
NodeContainerPointer
GetOutsidePoints()
{
return m_OutsidePoints;
}
/** Locate the level set. This method evokes the level set
* location algorithm. */
void
Locate();
protected:
LevelSetNeighborhoodExtractor();
~LevelSetNeighborhoodExtractor() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
typename LevelSetImageType::PixelType
GetLargeValue() const
{
return m_LargeValue;
}
const NodeType &
GetNodeUsedInCalculation(unsigned int idx) const
{
return m_NodesUsed[idx];
}
virtual void
Initialize();
virtual double
CalculateDistance(IndexType & index);
void
GenerateData() override;
bool
GetLastPointIsInside() const
{
return m_LastPointIsInside;
}
private:
void
GenerateDataFull();
void
GenerateDataNarrowBand();
double m_LevelSetValue{ 0.0 };
NodeContainerPointer m_InsidePoints{};
NodeContainerPointer m_OutsidePoints{};
LevelSetConstPointer m_InputLevelSet{};
bool m_NarrowBanding{ false };
double m_NarrowBandwidth{ 12.0 };
NodeContainerPointer m_InputNarrowBand{};
typename LevelSetImageType::RegionType m_ImageRegion{};
typename LevelSetImageType::PixelType m_LargeValue{};
std::vector<NodeType> m_NodesUsed{};
bool m_LastPointIsInside{ false };
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkLevelSetNeighborhoodExtractor.hxx"
#endif
#endif
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