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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 itkExtensionVelocitiesImageFilter_h
#define itkExtensionVelocitiesImageFilter_h
#include "itkLevelSetVelocityNeighborhoodExtractor.h"
#include "itkFastMarchingExtensionImageFilter.h"
#include "itkReinitializeLevelSetImageFilter.h"
namespace itk
{
/** \class ExtensionVelocitiesImageFilter
* \brief Extend velocities smoothly from a particular level set.
*
* ExtensionVelocitiesImageFilter extends velocities smoothly from a particular
* level set.
*
* This class is templated over the image type which represents
* the level set, the type of the velocity and the
* number of velocities to be extended.
*
* This class supports narrowbanding. If the input narrowband is provided,
* the algorithm will only locate the level set within the input narrowband.
* For the output, the extended velocity is only valid for a distance
* of OutputNarrowBandwidth / 2 of either side of the level set of interest.
*
* 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 = float, unsigned int VAuxDimension = 1>
class ITK_TEMPLATE_EXPORT ExtensionVelocitiesImageFilter : public ReinitializeLevelSetImageFilter<TLevelSet>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(ExtensionVelocitiesImageFilter);
/** Standard class type aliases. */
using Self = ExtensionVelocitiesImageFilter;
using Superclass = ReinitializeLevelSetImageFilter<TLevelSet>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(ExtensionVelocitiesImageFilter);
/** The type of level set and the pointer type. */
using LevelSetType = LevelSetTypeDefault<TLevelSet>;
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;
/** The dimension of the level set. */
static constexpr unsigned int SetDimension = LevelSetType::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;
/** Number of velocity images to be extended. */
static constexpr unsigned int AuxDimension = VAuxDimension;
/** Set/Get one of the input velocity images to be extended. */
void
SetInputVelocityImage(const AuxImageType * ptr, unsigned int idx = 0);
const AuxImageType *
GetInputVelocityImage(unsigned int idx = 0);
/** Get one of the extended velocity images. */
AuxImageType *
GetOutputVelocityImage(unsigned int idx = 0);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(AuxValueHasNumericTraitsCheck, (Concept::HasNumericTraits<TAuxValue>));
itkConceptMacro(LevelSetOStreamWritableCheck, (Concept::OStreamWritable<PixelType>));
// End concept checking
#endif
protected:
ExtensionVelocitiesImageFilter();
~ExtensionVelocitiesImageFilter() override = default;
void
GenerateDataFull() override;
void
GenerateDataNarrowBand() override;
void
AllocateOutput() override;
void
EnlargeOutputRequestedRegion(DataObject *) override;
private:
/** Internal type alias. */
using SpeedImageType = Image<float, Self::SetDimension>;
using LocatorType = LevelSetVelocityNeighborhoodExtractor<TLevelSet, TAuxValue, VAuxDimension>;
using FastMarchingImageFilterType =
FastMarchingExtensionImageFilter<TLevelSet, TAuxValue, VAuxDimension, SpeedImageType>;
typename LocatorType::Pointer m_Locator{};
typename FastMarchingImageFilterType::Pointer m_Marcher{};
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkExtensionVelocitiesImageFilter.hxx"
#endif
#endif
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