ITK  4.2.0
Insight Segmentation and Registration Toolkit
Public Types | Public Member Functions | Static Public Member Functions | Static Public Attributes | Protected Member Functions | Protected Attributes | Static Protected Attributes | Private Member Functions
itk::GPUGradientNDAnisotropicDiffusionFunction< TImage > Class Template Reference

#include <itkGPUGradientNDAnisotropicDiffusionFunction.h>

+ Inheritance diagram for itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >:
+ Collaboration diagram for itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >:

List of all members.

Public Types

typedef SmartPointer< const SelfConstPointer
typedef Superclass::FloatOffsetType FloatOffsetType
typedef Superclass::ImageType ImageType
typedef SizeValueType NeighborhoodSizeValueType
typedef
Superclass::NeighborhoodType 
NeighborhoodType
typedef Superclass::PixelRealType PixelRealType
typedef Superclass::PixelType PixelType
typedef SmartPointer< SelfPointer
typedef Superclass::RadiusType RadiusType
typedef
GPUGradientNDAnisotropicDiffusionFunction 
Self
typedef
GPUScalarAnisotropicDiffusionFunction
< TImage > 
Superclass
typedef Superclass::TimeStepType TimeStepType
- Public Types inherited from itk::GPUScalarAnisotropicDiffusionFunction< TImage >
- Public Types inherited from itk::GPUAnisotropicDiffusionFunction< TImage >
typedef Superclass::PixelRealType PixelrealType
- Public Types inherited from itk::GPUFiniteDifferenceFunction< TImage >
typedef
Superclass::DefaultBoundaryConditionType 
DefaultBoundaryConditionType
typedef Superclass DifferenceFunctionType
- Public Types inherited from itk::FiniteDifferenceFunction< TImage >
typedef Vector< PixelRealType,
itkGetStaticConstMacro(ImageDimension) > 
NeighborhoodScalesType
- Public Types inherited from itk::LightObject

Public Member Functions

virtual ::itk::LightObject::Pointer CreateAnother (void) const
virtual const char * GetNameOfClass () const
virtual void GPUComputeUpdate (const typename TImage::Pointer output, typename TImage::Pointer buffer, void *globalData)
virtual void InitializeIteration ()
 itkGetOpenCLSourceFromKernelMacro (GPUGradientNDAnisotropicDiffusionFunctionKernel)
- Public Member Functions inherited from itk::GPUScalarAnisotropicDiffusionFunction< TImage >
virtual void GPUCalculateAverageGradientMagnitudeSquared (TImage *)
 itkGetOpenCLSourceFromKernelMacro (GPUScalarAnisotropicDiffusionFunctionKernel)
- Public Member Functions inherited from itk::GPUAnisotropicDiffusionFunction< TImage >
virtual TimeStepType ComputeGlobalTimeStep (void *) const
const double & GetAverageGradientMagnitudeSquared () const
const double & GetConductanceParameter () const
virtual void * GetGlobalDataPointer () const
const TimeStepTypeGetTimeStep () const
virtual void GPUCalculateAverageGradientMagnitudeSquared (ImageType *)=0
virtual void ReleaseGlobalDataPointer (void *) const
void SetAverageGradientMagnitudeSquared (const double &c)
void SetConductanceParameter (const double &c)
void SetTimeStep (const TimeStepType &t)
- Public Member Functions inherited from itk::GPUFiniteDifferenceFunction< TImage >
virtual void GPUAllocateMetricData (unsigned int)
virtual void GPUReleaseMetricData ()
virtual PixelType ComputeUpdate (const NeighborhoodType &, void *, const FloatOffsetType &)
- Public Member Functions inherited from itk::FiniteDifferenceFunction< TImage >
const NeighborhoodScalesType ComputeNeighborhoodScales () const
const RadiusTypeGetRadius () const
void SetRadius (const RadiusType &r)
void SetScaleCoefficients (PixelRealType vals[ImageDimension])
- Public Member Functions inherited from itk::LightObject
virtual void Delete ()
virtual int GetReferenceCount () const
 itkCloneMacro (Self)
void Print (std::ostream &os, Indent indent=0) const
virtual void Register () const
virtual void SetReferenceCount (int)
virtual void UnRegister () const

Static Public Member Functions

static Pointer New ()

Static Public Attributes

static const unsigned int ImageDimension = Superclass::ImageDimension
- Static Public Attributes inherited from itk::GPUScalarAnisotropicDiffusionFunction< TImage >
- Static Public Attributes inherited from itk::GPUAnisotropicDiffusionFunction< TImage >
- Static Public Attributes inherited from itk::GPUFiniteDifferenceFunction< TImage >
- Static Public Attributes inherited from itk::FiniteDifferenceFunction< TImage >

Protected Member Functions

 GPUGradientNDAnisotropicDiffusionFunction ()
 ~GPUGradientNDAnisotropicDiffusionFunction ()
- Protected Member Functions inherited from itk::GPUScalarAnisotropicDiffusionFunction< TImage >
 GPUScalarAnisotropicDiffusionFunction ()
 ~GPUScalarAnisotropicDiffusionFunction ()
- Protected Member Functions inherited from itk::GPUAnisotropicDiffusionFunction< TImage >
 GPUAnisotropicDiffusionFunction ()
void PrintSelf (std::ostream &os, Indent indent) const
 ~GPUAnisotropicDiffusionFunction ()
- Protected Member Functions inherited from itk::GPUFiniteDifferenceFunction< TImage >
 GPUFiniteDifferenceFunction ()
 ~GPUFiniteDifferenceFunction ()
- Protected Member Functions inherited from itk::FiniteDifferenceFunction< TImage >
 FiniteDifferenceFunction ()
 ~FiniteDifferenceFunction ()
- Protected Member Functions inherited from itk::LightObject
virtual LightObject::Pointer InternalClone () const
 LightObject ()
virtual void PrintHeader (std::ostream &os, Indent indent) const
virtual void PrintTrailer (std::ostream &os, Indent indent) const
virtual ~LightObject ()

Protected Attributes

DerivativeOperator< PixelType,
itkGetStaticConstMacro(ImageDimension) > 
dx_op
NeighborhoodSizeValueType m_Center
NeighborhoodInnerProduct
< ImageType
m_InnerProduct
PixelType m_K
NeighborhoodSizeValueType m_Stride [ImageDimension]
std::slice x_slice [ImageDimension]
std::slice xa_slice [ImageDimension][ImageDimension]
std::slice xd_slice [ImageDimension][ImageDimension]

Static Protected Attributes

static double m_MIN_NORM

Private Member Functions

 GPUGradientNDAnisotropicDiffusionFunction (const Self &)
void operator= (const Self &)

Detailed Description

template<class TImage>
class itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >

This class implements an N-dimensional version of the classic Perona-Malik anisotropic diffusion equation for scalar-valued images on the GPU. See itkAnisotropicDiffusionFunction for an overview of the anisotropic diffusion framework and equation.

The conductance term for this implementation is chosen as a function of the gradient magnitude of the image at each point, reducing the strength of diffusion at edge pixels.

\[C(\mathbf{x}) = e^{-(\frac{\parallel \nabla U(\mathbf{x}) \parallel}{K})^2}\]

.

The numerical implementation of this equation is similar to that described in the Perona-Malik paper below, but uses a more robust technique for gradient magnitude estimation and has been generalized to N-dimensions.
References
Pietro Perona and Jalhandra Malik, ``Scale-space and edge detection using anisotropic diffusion,'' IEEE Transactions on Pattern Analysis Machine Intelligence, vol. 12, pp. 629-639, 1990.

Definition at line 59 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.


Member Typedef Documentation

template<class TImage>
typedef SmartPointer< const Self > itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::ConstPointer

A floating point offset from an image grid location. Used for interpolation among grid values in a neighborhood.

Reimplemented from itk::GPUAnisotropicDiffusionFunction< TImage >.

Definition at line 83 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.

Inherit some parameters from the superclass type.

Reimplemented from itk::GPUScalarAnisotropicDiffusionFunction< TImage >.

Definition at line 74 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.

template<class TImage>
typedef SmartPointer< Self > itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::Pointer

Standard class typedefs.

Reimplemented from itk::GPUScalarAnisotropicDiffusionFunction< TImage >.

Definition at line 64 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.

Define the TimeStepType to always be double.

Reimplemented from itk::GPUScalarAnisotropicDiffusionFunction< TImage >.

Definition at line 80 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.


Constructor & Destructor Documentation

template<class TImage>
itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::~GPUGradientNDAnisotropicDiffusionFunction ( )
inlineprotected

Member Function Documentation

template<class TImage>
virtual::itk::LightObject::Pointer itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::CreateAnother ( void  ) const
virtual

Create an object from an instance, potentially deferring to a factory. This method allows you to create an instance of an object that is exactly the same type as the referring object. This is useful in cases where an object has been cast back to a base class.

Reimplemented from itk::LightObject.

template<class TImage>
virtual const char* itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::GetNameOfClass ( ) const
virtual

Run-time type information (and related methods)

Reimplemented from itk::GPUScalarAnisotropicDiffusionFunction< TImage >.

template<class TImage>
virtual void itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::GPUComputeUpdate ( const typename TImage::Pointer  output,
typename TImage::Pointer  buffer,
void *  globalData 
)
virtual

Compute the equation value.

Implements itk::GPUFiniteDifferenceFunction< TImage >.

template<class TImage>
virtual void itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::InitializeIteration ( )
inlinevirtual

This method is called prior to each iteration of the solver.

Reimplemented from itk::GPUFiniteDifferenceFunction< TImage >.

Definition at line 98 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.

template<class TImage>
itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::itkGetOpenCLSourceFromKernelMacro ( GPUGradientNDAnisotropicDiffusionFunctionKernel  )

Get OpenCL Kernel source as a string, creates a GetOpenCLSource method

template<class TImage>
static Pointer itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::New ( )
static

Method for creation through the object factory.

Reimplemented from itk::LightObject.

template<class TImage>
void itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::operator= ( const Self )
private

Mutex lock to protect modification to the reference count

Reimplemented from itk::GPUScalarAnisotropicDiffusionFunction< TImage >.


Member Data Documentation

template<class TImage>
DerivativeOperator< PixelType, itkGetStaticConstMacro(ImageDimension) > itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::dx_op
protected

Derivative operator.

Definition at line 118 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.

template<class TImage>
const unsigned int itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::ImageDimension = Superclass::ImageDimension
static

Inherit some parameters from the superclass type.

Reimplemented from itk::GPUScalarAnisotropicDiffusionFunction< TImage >.

Definition at line 88 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.

template<class TImage>
NeighborhoodSizeValueType itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::m_Center
protected
template<class TImage>
NeighborhoodInnerProduct< ImageType > itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::m_InnerProduct
protected

Inner product function.

Definition at line 110 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.

template<class TImage>
PixelType itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::m_K
protected

Modified global average gradient magnitude term.

Definition at line 121 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.

template<class TImage>
double itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::m_MIN_NORM
staticprotected
template<class TImage>
NeighborhoodSizeValueType itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::m_Stride[ImageDimension]
protected
template<class TImage>
std::slice itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::x_slice[ImageDimension]
protected

Slices for the ND neighborhood.

Definition at line 113 of file itkGPUGradientNDAnisotropicDiffusionFunction.h.

template<class TImage>
std::slice itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::xa_slice[ImageDimension][ImageDimension]
protected
template<class TImage>
std::slice itk::GPUGradientNDAnisotropicDiffusionFunction< TImage >::xd_slice[ImageDimension][ImageDimension]
protected

The documentation for this class was generated from the following file: