template<typename TInputImage, typename TFeatureImage, typename TOutputPixelType = float>
class itk::GeodesicActiveContourLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >
Segments structures in images based on a user supplied edge potential map.
- IMPORTANT
- The SegmentationLevelSetImageFilter class and the GeodesicActiveContourLevelSetFunction class contain additional information necessary to gain full understanding of how to use this filter.
- OVERVIEW
- This class is a level set method segmentation filter. An initial contour is propagated outwards (or inwards) until it ''sticks'' to the shape boundaries. This is done by using a level set speed function based on a user supplied edge potential map.
- INPUTS
- This filter requires two inputs. The first input is a initial level set. The initial level set is a real image which contains the initial contour/surface as the zero level set. For example, a signed distance function from the initial contour/surface is typically used. Unlike the simpler ShapeDetectionLevelSetImageFilter the initial contour does not have to lie wholly within the shape to be segmented. The initial contour is allow to overlap the shape boundary. The extra advection term in the update equation behaves like a doublet and attracts the contour to the boundary. This approach for segmentation follows that of Caselles et al (1997).
- The second input is the feature image. For this filter, this is the edge potential map. General characteristics of an edge potential map is that it has values close to zero in regions near the edges and values close to one inside the shape itself. Typically, the edge potential map is compute from the image gradient, for example:
![\[ g(I) = 1 / ( 1 + | (\nabla * G)(I)| ) \]](form_321.png)
![\[ g(I) = \exp^{-|(\nabla * G)(I)|} \]](form_322.png)
where 
is image intensity and 
is the derivative of Gaussian operator.
- See SegmentationLevelSetImageFilter and SparseFieldLevelSetImageFilter for more information on Inputs.
- PARAMETERS
- The PropagationScaling parameter can be used to switch from propagation outwards (POSITIVE scaling parameter) versus propagating inwards (NEGATIVE scaling parameter).
This implementation allows the user to set the weights between the propagation, advection and curvature term using methods SetPropagationScaling(), SetAdvectionScaling(), SetCurvatureScaling(). In general, the larger the CurvatureScaling, the smoother the resulting contour. To follow the implementation in Caselles et al paper, set the PropagationScaling to 
(the inflation or ballon force) and AdvectionScaling and CurvatureScaling both to 1.0.
- OUTPUTS
- The filter outputs a single, scalar, real-valued image. Negative values in the output image represent the inside of the segmented region and positive values in the image represent the outside of the segmented region. The zero crossings of the image correspond to the position of the propagating front.
- See SparseFieldLevelSetImageFilter and SegmentationLevelSetImageFilter for more information.
- REFERENCES
- "Geodesic Active Contours", V. Caselles, R. Kimmel and G. Sapiro. International Journal on Computer Vision, Vol 22, No. 1, pp 61-97, 1997
- See Also
- SegmentationLevelSetImageFilter
-
GeodesicActiveContourLevelSetFunction
-
SparseFieldLevelSetImageFilter
- Examples:
- Examples/Segmentation/GeodesicActiveContourImageFilter.cxx, and SphinxExamples/src/Segmentation/LevelSets/SegmentWithGeodesicActiveContourLevelSet/Code.cxx.
Definition at line 107 of file itkGeodesicActiveContourLevelSetImageFilter.h.
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| using | ConstPointer = SmartPointer< const Self > |
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| using | FeatureImageType = typename Superclass::FeatureImageType |
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| using | GeodesicActiveContourFunctionPointer = typename GeodesicActiveContourFunctionType::Pointer |
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| using | GeodesicActiveContourFunctionType = GeodesicActiveContourLevelSetFunction< OutputImageType, FeatureImageType > |
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| using | OutputImageType = typename Superclass::OutputImageType |
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| using | Pointer = SmartPointer< Self > |
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| using | Self = GeodesicActiveContourLevelSetImageFilter |
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| using | Superclass = SegmentationLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType > |
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| using | ValueType = typename Superclass::ValueType |
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| using | ConstPointer = SmartPointer< const Self > |
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| using | FeatureImageType = TFeatureImage |
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| using | IndexType = typename Superclass::IndexType |
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| using | InputImageType = typename Superclass::InputImageType |
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| using | OutputImageType = Image< TOutputPixelType, Self::InputImageDimension > |
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| using | Pointer = SmartPointer< Self > |
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| using | SegmentationFunctionType = SegmentationLevelSetFunction< OutputImageType, FeatureImageType > |
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| using | Self = SegmentationLevelSetImageFilter |
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| using | SpeedImageType = typename SegmentationFunctionType::ImageType |
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| using | Superclass = SparseFieldLevelSetImageFilter< TInputImage, OutputImageType > |
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| using | TimeStepType = typename Superclass::TimeStepType |
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| using | ValueType = typename Superclass::ValueType |
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| using | VectorImageType = typename SegmentationFunctionType::VectorImageType |
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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 | NeighborhoodScalesType = typename Superclass::NeighborhoodScalesType |
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| using | OutputImageType = Image< TOutputPixelType, TInputImage::ImageDimension > |
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| using | Pointer = SmartPointer< Self > |
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| using | RadiusType = typename Superclass::RadiusType |
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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, Image< TOutputPixelType, TInputImage::ImageDimension > > |
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| using | TimeStepType = typename Superclass::TimeStepType |
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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< Image< TOutputPixelType, TInputImage::ImageDimension > > |
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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 = Image< TOutputPixelType, TInputImage::ImageDimension > |
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| using | OutputPixelType = typename Image< TOutputPixelType, TInputImage::ImageDimension >::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, Image< TOutputPixelType, TInputImage::ImageDimension > > |
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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 | OutputImagePixelType = typename Superclass::OutputImagePixelType |
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| using | OutputImagePointer = typename Superclass::OutputImagePointer |
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| using | OutputImageRegionType = typename Superclass::OutputImageRegionType |
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| using | OutputImageType = typename Superclass::OutputImageType |
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| using | Pointer = SmartPointer< Self > |
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| using | Self = InPlaceImageFilter |
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| using | Superclass = ImageToImageFilter< TInputImage, Image< TOutputPixelType, TInputImage::ImageDimension > > |
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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 | OutputImagePixelType = typename Superclass::OutputImagePixelType |
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| using | OutputImageRegionType = typename Superclass::OutputImageRegionType |
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| using | Pointer = SmartPointer< Self > |
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| using | Self = ImageToImageFilter |
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| using | Superclass = ImageSource< Image< TOutputPixelType, TInputImage::ImageDimension > > |
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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 = Image< TOutputPixelType, TInputImage::ImageDimension > |
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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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| void | GenerateData () override |
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| | GeodesicActiveContourLevelSetImageFilter () |
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| void | PrintSelf (std::ostream &os, Indent indent) const override |
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| | ~GeodesicActiveContourLevelSetImageFilter () override=default |
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| void | GenerateData () override |
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| void | PrintSelf (std::ostream &os, Indent indent) const override |
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| | SegmentationLevelSetImageFilter () |
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| | ~SegmentationLevelSetImageFilter () override=default |
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| void | InitializeIteration () override |
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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 *StatusUpList, LayerType *StatusDownList) |
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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 bool | Halt () |
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| virtual TimeStepType | ResolveTimeStep (const std::vector< TimeStepType > &timeStepList, const std::vector< bool > &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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| void | AllocateOutputs () override |
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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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| 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 () ITKv5_CONST override |
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| | ~ImageToImageFilter () override |
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| void | PushBackInput (const DataObject *input) override |
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| void | PushFrontInput (const DataObject *input) override |
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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 &outputRegionForThread, 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 | DynamicMultiThreadingOff () |
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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 | 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 num, DataObject *input) |
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| virtual void | SetNthOutput (DataObjectPointerArraySizeType num, 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 &key, DataObject *output) |
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| virtual void | SetPrimaryInput (DataObject *input) |
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| virtual void | SetPrimaryOutput (DataObject *output) |
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| void | SetRequiredInputNames (const NameArray &) |
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| virtual void | VerifyPreconditions () ITKv5_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 idx) |
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| const DataObject * | GetOutput (DataObjectPointerArraySizeType idx) const |
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| DataObject * | GetPrimaryOutput () |
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| const DataObject * | GetPrimaryOutput () const |
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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 &time) |
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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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Inheritance diagram for itk::GeodesicActiveContourLevelSetImageFilter< TInputImage, TFeatureImage, TOutputPixelType >:
1.8.5
