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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 itkInvertDisplacementFieldImageFilter_h
#define itkInvertDisplacementFieldImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkVectorInterpolateImageFunction.h"
#include "itkVectorLinearInterpolateImageFunction.h"
#include <mutex>
namespace itk
{
/**
* \class InvertDisplacementFieldImageFilter
*
* \brief Iteratively estimate the inverse field of a displacement field.
*
* \author Nick Tustison
* \author Brian Avants
*
* \ingroup ITKDisplacementField
*/
template <typename TInputImage, typename TOutputImage = TInputImage>
class ITK_TEMPLATE_EXPORT InvertDisplacementFieldImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(InvertDisplacementFieldImageFilter);
using Self = InvertDisplacementFieldImageFilter;
using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(InvertDisplacementFieldImageFilter);
/** Extract dimension from input image. */
static constexpr unsigned int ImageDimension = TInputImage::ImageDimension;
using InputFieldType = TInputImage;
using OutputFieldType = TOutputImage;
using DisplacementFieldType = InputFieldType;
using InverseDisplacementFieldType = OutputFieldType;
/** Image type alias support */
using PixelType = typename OutputFieldType::PixelType;
using VectorType = typename OutputFieldType::PixelType;
using RegionType = typename OutputFieldType::RegionType;
using OutputImageRegionType = RegionType;
using IndexType = typename OutputFieldType::IndexType;
using PointType = typename OutputFieldType::PointType;
using SpacingType = typename OutputFieldType::SpacingType;
using OriginType = typename OutputFieldType::PointType;
using SizeType = typename OutputFieldType::SizeType;
using DirectionType = typename OutputFieldType::DirectionType;
/** Other type alias */
using RealType = typename VectorType::ComponentType;
using RealImageType = Image<RealType, ImageDimension>;
using InterpolatorType = VectorInterpolateImageFunction<InputFieldType, RealType>;
using DefaultInterpolatorType = VectorLinearInterpolateImageFunction<InputFieldType, RealType>;
/** Get the interpolator. */
itkGetModifiableObjectMacro(Interpolator, InterpolatorType);
/** Set the deformation field */
void
SetDisplacementField(const InputFieldType * field)
{
itkDebugMacro("setting deformation field to " << field);
if (field != this->GetInput(0))
{
this->SetInput(0, field);
this->Modified();
if (!this->m_Interpolator.IsNull())
{
this->m_Interpolator->SetInputImage(field);
}
}
}
/**
* Get the deformation field.
*/
const InputFieldType *
GetDisplacementField() const
{
return this->GetInput(0);
}
/** Set/get the initial estimate for the inverse field (optional). */
itkSetInputMacro(InverseFieldInitialEstimate, InverseDisplacementFieldType);
itkGetInputMacro(InverseFieldInitialEstimate, InverseDisplacementFieldType);
/* Set the interpolator. */
virtual void
SetInterpolator(InterpolatorType * interpolator);
/* Set/Get the number of iterations */
itkSetMacro(MaximumNumberOfIterations, unsigned int);
itkGetConstMacro(MaximumNumberOfIterations, unsigned int);
/* Set/Get the mean stopping criterion */
itkSetMacro(MeanErrorToleranceThreshold, RealType);
itkGetConstMacro(MeanErrorToleranceThreshold, RealType);
/* Set/Get the max stopping criterion */
itkSetMacro(MaxErrorToleranceThreshold, RealType);
itkGetConstMacro(MaxErrorToleranceThreshold, RealType);
/* Get the max norm */
itkGetConstMacro(MaxErrorNorm, RealType);
/* Get the mean norm */
itkGetConstMacro(MeanErrorNorm, RealType);
/* Should we force the boundary to have zero displacement? */
itkSetMacro(EnforceBoundaryCondition, bool);
itkGetMacro(EnforceBoundaryCondition, bool);
itkBooleanMacro(EnforceBoundaryCondition);
protected:
/** Constructor */
InvertDisplacementFieldImageFilter();
/** Deconstructor */
~InvertDisplacementFieldImageFilter() override = default;
/** Standard print self function **/
void
PrintSelf(std::ostream & os, Indent indent) const override;
/** preprocessing function */
void
GenerateData() override;
/** Multithreaded function which generates the output field. */
void
DynamicThreadedGenerateData(const RegionType &) override;
private:
/** The interpolator. */
typename InterpolatorType::Pointer m_Interpolator{};
unsigned int m_MaximumNumberOfIterations{ 20 };
RealType m_MaxErrorToleranceThreshold{};
RealType m_MeanErrorToleranceThreshold{};
// internal ivars necessary for multithreading basic operations
typename DisplacementFieldType::Pointer m_ComposedField{};
typename RealImageType::Pointer m_ScaledNormImage{};
RealType m_MaxErrorNorm{};
RealType m_MeanErrorNorm{};
RealType m_Epsilon{};
SpacingType m_DisplacementFieldSpacing{};
bool m_DoThreadedEstimateInverse{ false };
bool m_EnforceBoundaryCondition{ true };
std::mutex m_Mutex{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkInvertDisplacementFieldImageFilter.hxx"
#endif
#endif
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