template<typename TInputImage, typename TOutputImage>
class itk::AnisotropicFourthOrderLevelSetImageFilter< TInputImage, TOutputImage >
This class implements the 4th-order level set anisotropic diffusion (smoothing) PDE.
- INPUT and OUTPUT
- This is a volume to volume filter; however, it is meant to process (smooth) surfaces. The input surface is an isosurface of the input volume. The isosurface value to be processed can be set by calling SetIsoSurfaceValue (default is 0). The output surface is the 0-isosurface of the output volume, regardless of the input isosurface value. To visualize the input/output surfaces to this filter a mesh extraction method such as marching cubes can be used.
- The 4th-order level set PDE framework is proposed as an alternative to 2nd order PDEs. By order we mean the order of differentiation of the level set image function required to compute derivatives for updating the image. For instance, the popular curvature flow uses 2nd-order derivatives of the level set image; hence, it is a 2nd order PDE.
- 2nd-order curvature flow can be used by itself to smooth surfaces as a post-processing filter or it can be used with other PDE terms such as a Canny edge term that attracts the surface to strong edges in a data image. Curvature flow smooths surfaces by making the surface move in the direction that will decrease surface area.
- The 4th-order PDE framework provides an improvement over curvature flow. Instead of making the surface move to decrease surface area it makes the surface move to decrease total curvature. Similar to curvature flow, these PDEs can be used alone or in conjunction with data terms. The 4th-order PDE framework is implemented in SparseFieldFourthOrderLevelSetImageFilter. This filter class, which is derived from that, uses the 4th-order PDE by itself to implement an anisotropic surface smoothing algorithm. This is a feature preserving surface processing algorithm that smooths surfaces but will preserve certain features (creases, edges, other sharp features) depending on the NormalProcessConductanceParameter.
- PARAMETERS
- As mentioned before, the IsoSurfaceValue parameter chooses which isosurface of the input to process. The MaxFilterIterations parameter determine the number of iterations for which this filter will run. The more iterations, the more smoothing. NormalProcessConductanceParameter controls the amount of feature preservation. Its units are in curvature. Reasonable values for almost all surface are in the range 0.1-0.25 . The shape of the surface where the total curvature is above the value of this parameter will tend to stay the same (be preserved) or even be sharpened. The lower the value, the more feature preservation. Notice the difference between the number of iterations parameter and the conductance parameter: for a given conductance parameter, surface features with high enough curvature will be preserved even if the number of iterations is set to be extremely large.
Definition at line 83 of file itkAnisotropicFourthOrderLevelSetImageFilter.h.
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using | ConstPointer = SmartPointer< const Self > |
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using | FunctionType = LevelSetFunctionWithRefitTerm< TOutputImage, SparseImageType > |
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using | Pointer = SmartPointer< Self > |
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using | RadiusType = typename FunctionType::RadiusType |
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using | Self = AnisotropicFourthOrderLevelSetImageFilter |
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using | Superclass = SparseFieldFourthOrderLevelSetImageFilter< TInputImage, TOutputImage > |
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using | ConstPointer = SmartPointer< const Self > |
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using | LevelSetFunctionType = LevelSetFunctionWithRefitTerm< OutputImageType, SparseImageType > |
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using | NodeType = NormalBandNode< OutputImageType > |
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using | NormalVectorFilterType = ImplicitManifoldNormalVectorFilter< OutputImageType, SparseImageType > |
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using | NormalVectorFunctionType = NormalVectorDiffusionFunction< SparseImageType > |
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using | NormalVectorType = typename NodeType::NodeDataType |
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using | Pointer = SmartPointer< Self > |
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using | Self = SparseFieldFourthOrderLevelSetImageFilter |
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using | SparseImageIteratorType = NeighborhoodIterator< SparseImageType > |
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using | SparseImageType = SparseImage< NodeType, Self::ImageDimension > |
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using | Superclass = SparseFieldLevelSetImageFilter< TInputImage, TOutputImage > |
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using | ConstPointer = SmartPointer< const Self > |
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using | IndexType = typename OutputImageType::IndexType |
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using | InputImageType = TInputImage |
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using | LayerListType = std::vector< LayerPointerType > |
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using | LayerNodeStorageType = ObjectStore< LayerNodeType > |
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using | LayerNodeType = SparseFieldLevelSetNode< IndexType > |
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using | LayerPointerType = typename LayerType::Pointer |
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using | LayerType = SparseFieldLayer< LayerNodeType > |
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using | OutputImageType = TOutputImage |
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using | Pointer = SmartPointer< Self > |
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using | Self = SparseFieldLevelSetImageFilter |
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using | StatusImageType = Image< StatusType, Self::ImageDimension > |
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using | StatusType = signed char |
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using | Superclass = FiniteDifferenceImageFilter< TInputImage, TOutputImage > |
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using | UpdateBufferType = std::vector< ValueType > |
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using | ValueType = typename OutputImageType::ValueType |
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using | ConstPointer = SmartPointer< const Self > |
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using | FiniteDifferenceFunctionType = FiniteDifferenceFunction< TOutputImage > |
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using | InputImageType = TInputImage |
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using | InputPixelType = typename TInputImage::PixelType |
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using | InputPixelValueType = typename NumericTraits< InputPixelType >::ValueType |
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using | NeighborhoodScalesType = typename FiniteDifferenceFunctionType::NeighborhoodScalesType |
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using | OutputImageType = TOutputImage |
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using | OutputPixelType = typename TOutputImage::PixelType |
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using | OutputPixelValueType = typename NumericTraits< OutputPixelType >::ValueType |
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using | PixelType = OutputPixelType |
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using | Pointer = SmartPointer< Self > |
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using | RadiusType = typename FiniteDifferenceFunctionType::RadiusType |
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using | Self = FiniteDifferenceImageFilter |
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using | Superclass = InPlaceImageFilter< TInputImage, TOutputImage > |
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using | TimeStepType = typename FiniteDifferenceFunctionType::TimeStepType |
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using | ConstPointer = SmartPointer< const Self > |
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using | InputImageConstPointer = typename InputImageType::ConstPointer |
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using | InputImagePixelType = typename InputImageType::PixelType |
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using | InputImagePointer = typename InputImageType::Pointer |
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using | InputImageRegionType = typename InputImageType::RegionType |
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using | InputImageType = TInputImage |
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using | Pointer = SmartPointer< Self > |
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using | Self = InPlaceImageFilter |
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using | Superclass = ImageToImageFilter< TInputImage, TOutputImage > |
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using | ConstPointer = SmartPointer< const Self > |
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using | InputImageConstPointer = typename InputImageType::ConstPointer |
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using | InputImagePixelType = typename InputImageType::PixelType |
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using | InputImagePointer = typename InputImageType::Pointer |
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using | InputImageRegionType = typename InputImageType::RegionType |
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using | InputImageType = TInputImage |
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using | Pointer = SmartPointer< Self > |
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using | Self = ImageToImageFilter |
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using | Superclass = ImageSource< TOutputImage > |
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using | ConstPointer = SmartPointer< const Self > |
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using | DataObjectIdentifierType = Superclass::DataObjectIdentifierType |
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using | DataObjectPointer = DataObject::Pointer |
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using | DataObjectPointerArraySizeType = Superclass::DataObjectPointerArraySizeType |
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using | OutputImagePixelType = typename OutputImageType::PixelType |
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using | OutputImagePointer = typename OutputImageType::Pointer |
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using | OutputImageRegionType = typename OutputImageType::RegionType |
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using | OutputImageType = TOutputImage |
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using | Pointer = SmartPointer< Self > |
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using | Self = ImageSource |
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using | Superclass = ProcessObject |
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using | ConstPointer = SmartPointer< const Self > |
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using | DataObjectIdentifierType = DataObject::DataObjectIdentifierType |
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using | DataObjectPointer = DataObject::Pointer |
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using | DataObjectPointerArray = std::vector< DataObjectPointer > |
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using | DataObjectPointerArraySizeType = DataObjectPointerArray::size_type |
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using | MultiThreaderType = MultiThreaderBase |
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using | NameArray = std::vector< DataObjectIdentifierType > |
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using | Pointer = SmartPointer< Self > |
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using | Self = ProcessObject |
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using | Superclass = Object |
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using | ConstPointer = SmartPointer< const Self > |
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using | Pointer = SmartPointer< Self > |
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using | Self = Object |
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using | Superclass = LightObject |
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using | ConstPointer = SmartPointer< const Self > |
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using | Pointer = SmartPointer< Self > |
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using | Self = LightObject |
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| AnisotropicFourthOrderLevelSetImageFilter () |
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void | PrintSelf (std::ostream &os, Indent indent) const override |
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| ~AnisotropicFourthOrderLevelSetImageFilter () override=default |
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bool | Halt () override |
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bool | ActiveLayerCheckBand () const |
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ValueType | ComputeCurvatureFromSparseImageNeighborhood (SparseImageIteratorType &it) const |
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void | ComputeCurvatureTarget (const OutputImageType *distanceImage, SparseImageType *sparseImage) const |
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void | PrintSelf (std::ostream &os, Indent indent) const override |
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void | ProcessNormals () |
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| SparseFieldFourthOrderLevelSetImageFilter () |
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| ~SparseFieldFourthOrderLevelSetImageFilter () override=default |
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void | AllocateUpdateBuffer () override |
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void | ApplyUpdate (const TimeStepType &dt) override |
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TimeStepType | CalculateChange () override |
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virtual ValueType | CalculateUpdateValue (const IndexType &, const TimeStepType &dt, const ValueType &value, const ValueType &change) |
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void | ConstructActiveLayer () |
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void | ConstructLayer (StatusType from, StatusType to) |
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void | CopyInputToOutput () override |
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virtual ValueType | GetValueOne () const |
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virtual ValueType | GetValueZero () const |
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void | Initialize () override |
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void | InitializeActiveLayerValues () |
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virtual void | InitializeBackgroundPixels () |
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void | PostProcessOutput () override |
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void | PrintSelf (std::ostream &os, Indent indent) const override |
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void | ProcessOutsideList (LayerType *OutsideList, StatusType ChangeToStatus) |
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void | ProcessStatusList (LayerType *InputList, LayerType *OutputList, StatusType ChangeToStatus, StatusType SearchForStatus) |
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void | PropagateAllLayerValues () |
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void | PropagateLayerValues (StatusType from, StatusType to, StatusType promote, int InOrOut) |
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| SparseFieldLevelSetImageFilter () |
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void | UpdateActiveLayerValues (TimeStepType dt, LayerType *UpList, LayerType *DownList) |
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| ~SparseFieldLevelSetImageFilter () override=default |
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| FiniteDifferenceImageFilter () |
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void | GenerateData () override |
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void | GenerateInputRequestedRegion () override |
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virtual TimeStepType | ResolveTimeStep (const std::vector< TimeStepType > &timeStepList, const BooleanStdVectorType &valid) const |
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virtual void | SetElapsedIterations (IdentifierType _arg) |
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virtual bool | ThreadedHalt (void *) |
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| ~FiniteDifferenceImageFilter () override=default |
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virtual bool | GetRunningInPlace () const |
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| InPlaceImageFilter ()=default |
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void | ReleaseInputs () override |
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| ~InPlaceImageFilter () override=default |
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void | AllocateOutputs () override |
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virtual void | CallCopyInputRegionToOutputRegion (OutputImageRegionType &destRegion, const InputImageRegionType &srcRegion) |
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virtual void | CallCopyOutputRegionToInputRegion (InputImageRegionType &destRegion, const OutputImageRegionType &srcRegion) |
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| ImageToImageFilter () |
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void | VerifyInputInformation () const override |
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| ~ImageToImageFilter () override=default |
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virtual void | PushBackInput (const DataObject *input) |
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virtual void | PushFrontInput (const DataObject *input) |
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virtual void | AfterThreadedGenerateData () |
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virtual void | BeforeThreadedGenerateData () |
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void | ClassicMultiThread (ThreadFunctionType callbackFunction) |
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virtual const ImageRegionSplitterBase * | GetImageRegionSplitter () const |
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| ImageSource () |
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virtual unsigned int | SplitRequestedRegion (unsigned int i, unsigned int pieces, OutputImageRegionType &splitRegion) |
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| ~ImageSource () override=default |
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virtual void | ThreadedGenerateData (const OutputImageRegionType ®ion, ThreadIdType threadId) |
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virtual void | DynamicThreadedGenerateData (const OutputImageRegionType &outputRegionForThread) |
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virtual bool | GetDynamicMultiThreading () const |
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virtual void | SetDynamicMultiThreading (bool _arg) |
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virtual void | DynamicMultiThreadingOn () |
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virtual void | AddInput (DataObject *input) |
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void | AddOptionalInputName (const DataObjectIdentifierType &) |
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void | AddOptionalInputName (const DataObjectIdentifierType &, DataObjectPointerArraySizeType idx) |
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virtual void | AddOutput (DataObject *output) |
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bool | AddRequiredInputName (const DataObjectIdentifierType &) |
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bool | AddRequiredInputName (const DataObjectIdentifierType &, DataObjectPointerArraySizeType idx) |
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virtual void | CacheInputReleaseDataFlags () |
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virtual void | GenerateOutputInformation () |
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virtual void | GenerateOutputRequestedRegion (DataObject *output) |
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DataObject * | GetInput (const DataObjectIdentifierType &key) |
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const DataObject * | GetInput (const DataObjectIdentifierType &key) const |
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virtual const DataObjectPointerArraySizeType & | GetNumberOfRequiredInputs () const |
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virtual const DataObjectPointerArraySizeType & | GetNumberOfRequiredOutputs () const |
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bool | IsIndexedInputName (const DataObjectIdentifierType &) const |
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bool | IsIndexedOutputName (const DataObjectIdentifierType &) const |
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bool | IsRequiredInputName (const DataObjectIdentifierType &) const |
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DataObjectPointerArraySizeType | MakeIndexFromInputName (const DataObjectIdentifierType &name) const |
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DataObjectPointerArraySizeType | MakeIndexFromOutputName (const DataObjectIdentifierType &name) const |
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DataObjectIdentifierType | MakeNameFromInputIndex (DataObjectPointerArraySizeType idx) const |
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DataObjectIdentifierType | MakeNameFromOutputIndex (DataObjectPointerArraySizeType idx) const |
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| ProcessObject () |
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virtual void | PropagateResetPipeline () |
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virtual void | PushBackInput (const DataObject *input) |
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virtual void | PushFrontInput (const DataObject *input) |
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virtual void | RemoveInput (const DataObjectIdentifierType &key) |
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virtual void | RemoveInput (DataObjectPointerArraySizeType) |
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virtual void | RemoveOutput (const DataObjectIdentifierType &key) |
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virtual void | RemoveOutput (DataObjectPointerArraySizeType idx) |
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bool | RemoveRequiredInputName (const DataObjectIdentifierType &) |
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virtual void | RestoreInputReleaseDataFlags () |
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virtual void | SetInput (const DataObjectIdentifierType &key, DataObject *input) |
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virtual void | SetNthInput (DataObjectPointerArraySizeType idx, DataObject *input) |
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virtual void | SetNthOutput (DataObjectPointerArraySizeType idx, DataObject *output) |
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void | SetNumberOfIndexedInputs (DataObjectPointerArraySizeType num) |
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void | SetNumberOfIndexedOutputs (DataObjectPointerArraySizeType num) |
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virtual void | SetNumberOfRequiredInputs (DataObjectPointerArraySizeType) |
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virtual void | SetNumberOfRequiredOutputs (DataObjectPointerArraySizeType _arg) |
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virtual void | SetOutput (const DataObjectIdentifierType &name, DataObject *output) |
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virtual void | SetPrimaryInput (DataObject *object) |
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virtual void | SetPrimaryOutput (DataObject *object) |
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void | SetRequiredInputNames (const NameArray &) |
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virtual void | VerifyPreconditions () const |
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| ~ProcessObject () override |
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DataObject * | GetInput (DataObjectPointerArraySizeType idx) |
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const DataObject * | GetInput (DataObjectPointerArraySizeType idx) const |
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DataObject * | GetPrimaryInput () |
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const DataObject * | GetPrimaryInput () const |
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virtual void | SetPrimaryInputName (const DataObjectIdentifierType &key) |
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virtual const char * | GetPrimaryInputName () const |
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DataObject * | GetOutput (const DataObjectIdentifierType &key) |
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const DataObject * | GetOutput (const DataObjectIdentifierType &key) const |
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virtual void | SetPrimaryOutputName (const DataObjectIdentifierType &key) |
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virtual const char * | GetPrimaryOutputName () const |
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DataObject * | GetOutput (DataObjectPointerArraySizeType i) |
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const DataObject * | GetOutput (DataObjectPointerArraySizeType i) const |
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DataObject * | GetPrimaryOutput () |
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const DataObject * | GetPrimaryOutput () const |
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virtual bool | GetThreaderUpdateProgress () const |
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virtual void | ThreaderUpdateProgressOn () |
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virtual void | SetThreaderUpdateProgress (bool arg) |
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| Object () |
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bool | PrintObservers (std::ostream &os, Indent indent) const |
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virtual void | SetTimeStamp (const TimeStamp &timeStamp) |
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| ~Object () override |
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virtual LightObject::Pointer | InternalClone () const |
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| LightObject () |
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virtual void | PrintHeader (std::ostream &os, Indent indent) const |
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virtual void | PrintTrailer (std::ostream &os, Indent indent) const |
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virtual | ~LightObject () |
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