ITK
6.0.0
Insight Toolkit
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#include <itkMinMaxCurvatureFlowImageFilter.h>
Denoise an image using min/max curvature flow.
MinMaxCurvatureFlowImageFilter implements a curvature driven image denoising algorithm. Iso-brightness contours in the grayscale input image are viewed as a level set. The level set is then evolved using a curvature-based speed function:
\[ I_t = F_{\mbox{minmax}} |\nabla I| \]
where \( F_{\mbox{minmax}} = \max(\kappa,0) \) if \( \mbox{Avg}_{\mbox{stencil}}(x) \) is less than or equal to \( T_{threshold} \) and \( \min(\kappa,0) \), otherwise. \( \kappa \) is the mean curvature of the iso-brightness contour at point \( x \).
In min/max curvature flow, movement is turned on or off depending on the scale of the noise one wants to remove. Switching depends on the average image value of a region of radius \( R \) around each point. The choice of \( R \), the stencil radius, governs the scale of the noise to be removed.
The threshold value \( T_{threshold} \) is the average intensity obtained in the direction perpendicular to the gradient at point \( x \) at the extrema of the local neighborhood.
This filter make use of the multi-threaded finite difference solver hierarchy. Updates are computed using a MinMaxCurvatureFlowFunction object. A zero flux Neumann boundary condition is used when computing derivatives near the data boundary.
Reference: "Level Set Methods and Fast Marching Methods", J.A. Sethian, Cambridge Press, Chapter 16, Second edition, 1999.
Definition at line 83 of file itkMinMaxCurvatureFlowImageFilter.h.
Static Public Member Functions | |
static Pointer | New () |
Static Public Member Functions inherited from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage > | |
static Pointer | New () |
Static Public Member Functions inherited from itk::ImageToImageFilter< TInputImage, TOutputImage > | |
static double | GetGlobalDefaultCoordinateTolerance () |
static double | GetGlobalDefaultDirectionTolerance () |
static void | SetGlobalDefaultCoordinateTolerance (double) |
static void | SetGlobalDefaultDirectionTolerance (double) |
Static Public Member Functions inherited from itk::Object | |
static bool | GetGlobalWarningDisplay () |
static void | GlobalWarningDisplayOff () |
static void | GlobalWarningDisplayOn () |
static Pointer | New () |
static void | SetGlobalWarningDisplay (bool val) |
Static Public Member Functions inherited from itk::LightObject | |
static void | BreakOnError () |
static Pointer | New () |
Static Public Attributes | |
static constexpr unsigned int | ImageDimension = Superclass::ImageDimension |
Static Public Attributes inherited from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage > | |
static constexpr unsigned int | ImageDimension = Superclass::ImageDimension |
Static Public Attributes inherited from itk::DenseFiniteDifferenceImageFilter< TInputImage, TOutputImage > | |
static constexpr unsigned int | ImageDimension = Superclass::ImageDimension |
Static Public Attributes inherited from itk::FiniteDifferenceImageFilter< TInputImage, TOutputImage > | |
static constexpr unsigned int | ImageDimension = OutputImageType::ImageDimension |
Static Public Attributes inherited from itk::InPlaceImageFilter< TInputImage, TOutputImage > | |
static constexpr unsigned int | InputImageDimension |
static constexpr unsigned int | OutputImageDimension |
Static Public Attributes inherited from itk::ImageToImageFilter< TInputImage, TOutputImage > | |
static constexpr unsigned int | InputImageDimension = TInputImage::ImageDimension |
static constexpr unsigned int | OutputImageDimension = TOutputImage::ImageDimension |
Static Public Attributes inherited from itk::ImageSource< TOutputImage > | |
static constexpr unsigned int | OutputImageDimension = TOutputImage::ImageDimension |
Private Attributes | |
RadiusValueType | m_StencilRadius {} |
using itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::ConstPointer = SmartPointer<const Self> |
Definition at line 93 of file itkMinMaxCurvatureFlowImageFilter.h.
using itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::MinMaxCurvatureFlowFunctionType = MinMaxCurvatureFlowFunction<OutputImageType> |
MinMaxCurvatureFlowFunction type.
Definition at line 106 of file itkMinMaxCurvatureFlowImageFilter.h.
using itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::Pointer = SmartPointer<Self> |
Definition at line 92 of file itkMinMaxCurvatureFlowImageFilter.h.
using itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::RadiusType = typename FiniteDifferenceFunctionType::RadiusType |
Typedef support for the neighbour radius.
Definition at line 113 of file itkMinMaxCurvatureFlowImageFilter.h.
using itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::RadiusValueType = typename RadiusType::SizeValueType |
Definition at line 114 of file itkMinMaxCurvatureFlowImageFilter.h.
using itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::Self = MinMaxCurvatureFlowImageFilter |
Standard class type aliases.
Definition at line 90 of file itkMinMaxCurvatureFlowImageFilter.h.
using itk::MinMaxCurvatureFlowImageFilter< TInputImage, TOutputImage >::Superclass = CurvatureFlowImageFilter<TInputImage, TOutputImage> |
Definition at line 91 of file itkMinMaxCurvatureFlowImageFilter.h.
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protected |
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overrideprotecteddefault |
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overridevirtual |
Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >.
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virtual |
Set/Get the stencil radius.
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overrideprotectedvirtual |
Initialize the state of filter and equation before each iteration. Progress feedback is implemented as part of this method.
Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >.
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static |
Method for creation through the object factory.
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overrideprotectedvirtual |
Methods invoked by Print() to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.
Reimplemented from itk::CurvatureFlowImageFilter< TInputImage, TOutputImage >.
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virtual |
Set/Get the stencil radius.
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staticconstexpr |
Dimensionality of input and output data is assumed to be the same. It is inherited from the superclass.
Definition at line 110 of file itkMinMaxCurvatureFlowImageFilter.h.
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private |
Definition at line 149 of file itkMinMaxCurvatureFlowImageFilter.h.