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ENH: Adding B-spline SyN registration method.
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Modules/Filtering/DisplacementField/include/itkDisplacementFieldToBSplineImageFilter.h
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| /*========================================================================= | ||
| * | ||
| * Copyright Insight Software Consortium | ||
| * | ||
| * 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 | ||
| * | ||
| * http://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 __itkDisplacementFieldToBSplineImageFilter_h | ||
| #define __itkDisplacementFieldToBSplineImageFilter_h | ||
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| #include "itkImageToImageFilter.h" | ||
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| #include "itkBSplineScatteredDataPointSetToImageFilter.h" | ||
| #include "itkPointSet.h" | ||
| #include "itkVector.h" | ||
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| namespace itk | ||
| { | ||
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| /** | ||
| * \class DisplacementFieldToBSplineImageFilter | ||
| * \brief Class which takes a displacement field image and smooths it | ||
| * using B-splines. The inverse can also be estimated. | ||
| * | ||
| * \author Nick Tustison | ||
| * | ||
| * \ingroup ITKDisplacementField | ||
| */ | ||
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| template <class TInputImage, class TOutputImage = TInputImage> | ||
| class DisplacementFieldToBSplineImageFilter | ||
| : public ImageToImageFilter<TInputImage, TOutputImage> | ||
| { | ||
| public: | ||
| typedef DisplacementFieldToBSplineImageFilter Self; | ||
| typedef ImageToImageFilter<TInputImage, TOutputImage> Superclass; | ||
| typedef SmartPointer<Self> Pointer; | ||
| typedef SmartPointer<const Self> ConstPointer; | ||
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| /** Method for creation through the object factory. */ | ||
| itkNewMacro( Self ); | ||
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| /** Extract dimension from input image. */ | ||
| itkStaticConstMacro( ImageDimension, unsigned int, TInputImage::ImageDimension ); | ||
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| typedef TInputImage InputFieldType; | ||
| typedef TOutputImage OutputFieldType; | ||
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| typedef InputFieldType DisplacementFieldType; | ||
| typedef OutputFieldType InverseDisplacementFieldType; | ||
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| /** Image typedef support. */ | ||
| typedef typename OutputFieldType::PixelType PixelType; | ||
| typedef typename OutputFieldType::PixelType VectorType; | ||
| typedef typename OutputFieldType::RegionType RegionType; | ||
| typedef typename OutputFieldType::IndexType IndexType; | ||
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| typedef typename OutputFieldType::PointType PointType; | ||
| typedef typename OutputFieldType::SpacingType SpacingType; | ||
| typedef typename OutputFieldType::PointType OriginType; | ||
| typedef typename OutputFieldType::SizeType SizeType; | ||
| typedef typename OutputFieldType::DirectionType DirectionType; | ||
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| /** B-spline smoothing filter argument typedefs */ | ||
| typedef PointSet<VectorType, ImageDimension> PointSetType; | ||
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| /** B-sline filter typedefs */ | ||
| typedef BSplineScatteredDataPointSetToImageFilter< | ||
| PointSetType, OutputFieldType> BSplineFilterType; | ||
| typedef typename BSplineFilterType::WeightsContainerType WeightsContainerType; | ||
| typedef typename BSplineFilterType::PointDataImageType DisplacementFieldControlPointLatticeType; | ||
| typedef typename BSplineFilterType::ArrayType ArrayType; | ||
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| /** Set the displacement field */ | ||
| void SetDisplacementField( const InputFieldType * field ) | ||
| { | ||
| this->SetInput( field ); | ||
| } | ||
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| /** | ||
| * Get the deformation field. | ||
| */ | ||
| const InputFieldType* GetDisplacementField() const | ||
| { | ||
| return this->GetInput( 0 ); | ||
| } | ||
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| /** | ||
| * Get the displacement field control point lattice. | ||
| */ | ||
| const DisplacementFieldControlPointLatticeType * GetDisplacementFieldControlPointLattice() const | ||
| { | ||
| return this->m_DisplacementFieldControlPointLattice; | ||
| } | ||
|
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| /** | ||
| * Set the spline order defining the bias field estimate. Default = 3. | ||
| */ | ||
| itkSetMacro( SplineOrder, unsigned int ); | ||
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| /** | ||
| * Get the spline order defining the bias field estimate. Default = 3. | ||
| */ | ||
| itkGetConstMacro( SplineOrder, unsigned int ); | ||
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| /** | ||
| * Set the control point grid size definining the B-spline estimate of the | ||
| * scalar bias field. In each dimension, the B-spline mesh size is equal | ||
| * to the number of control points in that dimension minus the spline order. | ||
| * Default = 4 control points in each dimension for a mesh size of 1 in each | ||
| * dimension. | ||
| */ | ||
| itkSetMacro( NumberOfControlPoints, ArrayType ); | ||
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| /** | ||
| * Get the control point grid size definining the B-spline estimate of the | ||
| * scalar bias field. In each dimension, the B-spline mesh size is equal | ||
| * to the number of control points in that dimension minus the spline order. | ||
| * Default = 4 control points in each dimension for a mesh size of 1 in each | ||
| * dimension. | ||
| */ | ||
| itkGetConstMacro( NumberOfControlPoints, ArrayType ); | ||
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| /** | ||
| * Set the number of fitting levels. One of the contributions of N4 is the | ||
| * introduction of a multi-scale approach to fitting. This allows one to | ||
| * specify a B-spline mesh size for initial fitting followed by a doubling of | ||
| * the mesh resolution for each subsequent fitting level. Default = 1 level. | ||
| */ | ||
| itkSetMacro( NumberOfFittingLevels, ArrayType ); | ||
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| /** | ||
| * Set the number of fitting levels. One of the contributions of N4 is the | ||
| * introduction of a multi-scale approach to fitting. This allows one to | ||
| * specify a B-spline mesh size for initial fitting followed by a doubling of | ||
| * the mesh resolution for each subsequent fitting level. Default = 1 level. | ||
| */ | ||
| void SetNumberOfFittingLevels( unsigned int n ) | ||
| { | ||
| ArrayType nlevels; | ||
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| nlevels.Fill( n ); | ||
| this->SetNumberOfFittingLevels( nlevels ); | ||
| } | ||
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| /** | ||
| * Get the number of fitting levels. One of the contributions of N4 is the | ||
| * introduction of a multi-scale approach to fitting. This allows one to | ||
| * specify a B-spline mesh size for initial fitting followed by a doubling of | ||
| * the mesh resolution for each subsequent fitting level. Default = 1 level. | ||
| */ | ||
| itkGetConstMacro( NumberOfFittingLevels, ArrayType ); | ||
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| /** | ||
| * Estimate the inverse field instead of the forward field. Default = false. | ||
| */ | ||
| itkBooleanMacro( EstimateInverse ); | ||
| itkSetMacro( EstimateInverse, bool ); | ||
| itkGetConstMacro( EstimateInverse, bool ); | ||
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| /** | ||
| * Enforce stationary boundary conditions. Default = false. | ||
| */ | ||
| itkBooleanMacro( EnforceStationaryBoundary ); | ||
| itkSetMacro( EnforceStationaryBoundary, bool ); | ||
| itkGetConstMacro( EnforceStationaryBoundary, bool ); | ||
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| protected: | ||
|
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| /** Constructor */ | ||
| DisplacementFieldToBSplineImageFilter(); | ||
|
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| /** Deconstructor */ | ||
| virtual ~DisplacementFieldToBSplineImageFilter(); | ||
|
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| /** Standard print self function **/ | ||
| void PrintSelf( std::ostream& os, Indent indent ) const; | ||
|
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| /** preprocessing function */ | ||
| void GenerateData(); | ||
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| private: | ||
| DisplacementFieldToBSplineImageFilter( const Self& ); //purposely not implemented | ||
| void operator=( const Self& ); //purposely not implemented | ||
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| bool m_EstimateInverse; | ||
| bool m_EnforceStationaryBoundary; | ||
| unsigned int m_SplineOrder; | ||
| ArrayType m_NumberOfControlPoints; | ||
| ArrayType m_NumberOfFittingLevels; | ||
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| typename DisplacementFieldControlPointLatticeType::Pointer m_DisplacementFieldControlPointLattice; | ||
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| }; | ||
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| } // end namespace itk | ||
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| #ifndef ITK_MANUAL_INSTANTIATION | ||
| #include "itkDisplacementFieldToBSplineImageFilter.hxx" | ||
| #endif | ||
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| #endif |
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