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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 itkLevelSetVelocityNeighborhoodExtractor_h
#define itkLevelSetVelocityNeighborhoodExtractor_h
#include "itkLevelSetNeighborhoodExtractor.h"
namespace itk
{
/** \class LevelSetVelocityNeighborhoodExtractor
* \brief Locate pixels of a particular level set.
*
* LevelSetVelocityNeighborhoodExtractor extends the functionality of
* LevelSetNeighborhoodExtractor by also extracting the values
* of velocity variables at the specified level set. Specifically,
* it populates two containers: one containing the value of velocity
* variables immediately inside the contour defined by the level set and the
* other containing values for velocity variables immediately outside.
*
* The containers AuxInsideValues() and AuxOutsideValues() can
* be used in conjunction with Superclass::InsidePoints() and
* Superclass::OutsidePoints() in FastMarchingExtensionImageFilter
* to produce images which extends the velocity variables smoothly
* from the specified level set.
*
* This class is templated over the image type representing
* the level set, the type of the auxiliary/velocity variables and the
* number of auxiliary/velocity variables.
*
* 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, typename TAuxValue, unsigned int VAuxDimension = 1>
class ITK_TEMPLATE_EXPORT LevelSetVelocityNeighborhoodExtractor : public LevelSetNeighborhoodExtractor<TLevelSet>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(LevelSetVelocityNeighborhoodExtractor);
/** Standard class typedefs. */
using Self = LevelSetVelocityNeighborhoodExtractor;
using Superclass = LevelSetNeighborhoodExtractor<TLevelSet>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(LevelSetVelocityNeighborhoodExtractor);
/** The type of the level set. */
using LevelSetType = LevelSetTypeDefault<TLevelSet>;
/** The dimension of the level set. */
static constexpr unsigned int SetDimension = LevelSetType::SetDimension;
/** Index type alias support */
using Index = itk::Index<Self::SetDimension>;
/** AuxVarType type alias support */
using AuxVarType = AuxVarTypeDefault<TAuxValue, VAuxDimension, Self::SetDimension>;
using AuxValueType = typename AuxVarType::AuxValueType;
using AuxValueVectorType = typename AuxVarType::AuxValueVectorType;
using AuxValueContainer = typename AuxVarType::AuxValueContainer;
using AuxImageType = typename AuxVarType::AuxImageType;
using AuxImagePointer = typename AuxVarType::AuxImagePointer;
using AuxImageConstPointer = typename AuxVarType::AuxImageConstPointer;
/** Set the auxiliary images. */
void
SetAuxImage(const AuxImageType * ptr, unsigned int idx = 0)
{
if (idx < VAuxDimension && m_AuxImage[idx] != ptr)
{
m_AuxImage[idx] = ptr;
}
this->Modified();
}
/** Get the auxiliary images. */
AuxImageConstPointer
GetAuxImage(unsigned int idx = 0)
{
if (idx >= VAuxDimension)
{
return nullptr;
}
else
{
return m_AuxImage[idx];
}
}
/** Get the container of auxiliary values associated with the inside
* points. */
itkGetModifiableObjectMacro(AuxInsideValues, AuxValueContainer);
/** Get the container of auxiliary values associate with the outside
* points. */
itkGetModifiableObjectMacro(AuxOutsideValues, AuxValueContainer);
protected:
LevelSetVelocityNeighborhoodExtractor();
~LevelSetVelocityNeighborhoodExtractor() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
void
Initialize() override;
double
CalculateDistance(Index & index) override;
private:
typename AuxValueContainer::Pointer m_AuxInsideValues{};
typename AuxValueContainer::Pointer m_AuxOutsideValues{};
AuxImageConstPointer m_AuxImage[VAuxDimension]{};
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkLevelSetVelocityNeighborhoodExtractor.hxx"
#endif
#endif
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