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itk::fem::FEMRegistrationFilter< TReference, TTarget > Class Template Reference

FEM Image registration example class. More...

#include <itkFEMRegistrationFilter.h>

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List of all members.

Public Types

typedef FEMRegistrationFilter Self
typedef ImageToImageFilter<
TReference, TTarget > 		Superclass
typedef SmartPointer< Self > Pointer
typedef SmartPointer< const
Self > 		ConstPointer
typedef TReference ImageType
typedef TTarget TargetImageType
typedef ImageType::PixelType ImageDataType
typedef ImageType::PixelType PixelType
typedef ImageType::SizeType ImageSizeType
typedef Image< float, itkGetStaticConstMacro(ImageDimension) FloatImageType )
typedef LinearSystemWrapperItpack LinearSystemSolverType
typedef SolverCrankNicolson SolverType
typedef double Float
typedef MaterialLinearElasticity MaterialType
typedef ImageToImageMetric<
ImageType, TargetImageType > 		MetricBaseType
typedef MetricBaseType::Pointer MetricBaseTypePointer
typedef itk::Vector< float,
itkGetStaticConstMacro(ImageDimension) 		VectorType )
typedef itk::Image< VectorType,
itkGetStaticConstMacro(ImageDimension) 		FieldType )
typedef itk::WarpImageFilter<
ImageType, ImageType, FieldType > 		WarperType
typedef itk::ImageRegionIteratorWithIndex<
ImageType > 		ImageIterator
typedef itk::ImageRegionIteratorWithIndex<
FieldType > 		FieldIterator
typedef itk::VectorIndexSelectionCastImageFilter<
FieldType, FloatImageType > 		IndexSelectCasterType
typedef ImageMetricLoad< ImageType,
ImageType > 		ImageMetricLoadType
enum  Sign { positive = 1, negative = -1 }

Public Methods

virtual const char * GetClassName () const
 itkStaticConstMacro (ImageDimension, unsigned int, ImageType::ImageDimension)
bool ReadConfigFile (const char *)
void RunRegistration ()
void WriteWarpedImage (const char *fn)
void CreateMesh (double ElementsPerSide, Solver &S)
void ApplyLoads (SolverType &S, ImageSizeType Isz)
void CreateLinearSystemSolver ()
void IterativeSolve (SolverType &S)
void MultiResSolve ()
Float EvaluateEnergy ()
void GetVectorField (SolverType &S)
void SampleVectorFieldAtNodes (SolverType &S)
void WarpImage (ImageType *R)
int WriteDisplacementField (unsigned int index)
void SetReferenceFile (const char *r)
std::string GetReferenceFile ()
void SetTargetFile (const char *t)
std::string GetTargetFile ()
void SetReferenceImage (ImageType *R)
void SetTargetImage (TargetImageType *T)
ImageType * GetReferenceImage ()
TargetImageType * GetTargetImage ()
ImageType * GetWarpedImage ()
FieldType * GetDeformationField ()
void SetLandmarkFile (const char *l)
void UseLandmarks (bool b)
void SetResultsFile (const char *r)
void SetResultsFileName (const char *f)
std::string GetResultsFileName ()
void SetDisplacementsFile (const char *r)
void SetNumberOfIntegrationPoints (unsigned int i, unsigned int which=0)
void SetWidthOfMetricRegion (unsigned int i, unsigned int which=0)
void SetMaximumIterations (unsigned int i, unsigned int which)
void SetTimeStep (Float i)
void SetAlpha (Float a)
void SetEnergyReductionFactor (Float i)
void SetElasticity (Float i, unsigned int which=0)
Float GetElasticity (unsigned int which=0)
void SetRho (Float r, unsigned int which=0)
void SetGamma (Float r, unsigned int which=0)
void SetDescentDirectionMinimize ()
void SetDescentDirectionMaximize ()
void DoLineSearch (unsigned int b)
void DoMultiRes (bool b)
void SetLineSearchFrequency (unsigned int f)
void SetLineSearchMaximumIterations (unsigned int f)
void SetWriteDisplacements (bool b)
bool GetWriteDisplacements ()
void SetConfigFileName (const char *f)
std::string GetConfigFileName ()
ImageSizeType GetImageSize ()
void SetMetric (MetricBaseTypePointer MP)
void ChooseMetric (float whichmetric)
void SetElement (Element::Pointer e)
void SetMaterial (MaterialType::Pointer m)
void PrintVectorField ()
Float EvaluateResidual (SolverType &mySolver, Float t)
void FindBracketingTriplet (SolverType &mySolver, Float *a, Float *b, Float *c)
Float GoldenSection (SolverType &mySolver, Float tol=0.01, unsigned int MaxIters=25)
void SetMeshElementsPerDimensionAtEachResolution (unsigned int i, unsigned int which=0)
 FEMRegistrationFilter ()
 ~FEMRegistrationFilter ()

Static Public Methods

Pointer New ()

Protected Methods

void PrintSelf (std::ostream &os, Indent indent) const

Detailed Description

template<class TReference, class TTarget>
class itk::fem::FEMRegistrationFilter< TReference, TTarget >

FEM Image registration example class.

The image registration problem is modeled here with the finite element method. Image registration is, in general, an ill-posed problem. Thus, we use an optimization scheme where the optimization criterion is given by a regularized variational energy. The variational energy arises from modeling the image as a physical body on which external forces act. The body is allowed to deform so as to minimize the applied force. The resistance of the physical body to deformation, determined by the physics associated with the body, serves to regularize the solution. The forces applied to the body are, generally, highly non-linear and so the body is allowed to deform slowly and incrementally. The direction it deforms follows the gradient of the potential energy (the force) we define. The potential energies we may choose from are given by the itk image-to-image metrics. The choices and the associated direction of descent are : Mean Squares (minimize), Normalized Cross-Correlation (maximize) Pattern Intensity (maximize) Mutual Information (maximize). Note that we have to set the direction (SetDescentDirection) when we choose a metric. The forces driving the problem may also be given by user-supplied landmarks. The corners of the image, in this example, are always pinned. This example is designed for 2D or 3D images. A rectilinear mesh is generated automatically given the correct element type (Quadrilateral or Hexahedral).

Our specific Solver for this example uses trapezoidal time stepping. This is a method for solving a second-order PDE in time. The solution is penalized by the zeroth (mass matrix) and first derivatives (stiffness matrix) of the shape functions. There is an option to perform a line search on the energy after each iteration. Optimal parameter settings require experimentation. The following approach tends to work well : Choose the relative size of density to elasticity (e.g. Rho / E ~= 1.) such that the image deforms locally and slowly. This also affects the stability of the solution. Choose the time step to control the size of the deformation at each step. Choose enough iterations to allow the solution to converge (this may be automated).

Reading images is up to the user. Either set the images using SetReference/TargetImage or see the ReadImages function. Outputs are raw images of the same type as the reference image.

Note:
This code works for only 2 or 3 dimensions.
Note:
Not yet a REAL itk filter!

Definition at line 98 of file itkFEMRegistrationFilter.h.

Member Typedef Documentation

template<class TReference, class TTarget>
typedef SmartPointer<const Self> itk::fem::FEMRegistrationFilter< TReference, TTarget >::ConstPointer
 

Reimplemented from itk::ImageToImageFilter< TReference, TTarget >.

Definition at line 104 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef itk::ImageRegionIteratorWithIndex<FieldType> itk::fem::FEMRegistrationFilter< TReference, TTarget >::FieldIterator
 

Definition at line 136 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef itk::Image<VectorType,itkGetStaticConstMacro(ImageDimension) itk::fem::FEMRegistrationFilter< TReference, TTarget >::FieldType)
 

Definition at line 133 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef double itk::fem::FEMRegistrationFilter< TReference, TTarget >::Float
 

Definition at line 126 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef Image< float, itkGetStaticConstMacro(ImageDimension) itk::fem::FEMRegistrationFilter< TReference, TTarget >::FloatImageType)
 

Definition at line 122 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef ImageType::PixelType itk::fem::FEMRegistrationFilter< TReference, TTarget >::ImageDataType
 

Definition at line 114 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef itk::ImageRegionIteratorWithIndex<ImageType> itk::fem::FEMRegistrationFilter< TReference, TTarget >::ImageIterator
 

Definition at line 135 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef ImageMetricLoad<ImageType,ImageType> itk::fem::FEMRegistrationFilter< TReference, TTarget >::ImageMetricLoadType
 

Instantiate the load class with the correct image type.

Definition at line 140 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef ImageType::SizeType itk::fem::FEMRegistrationFilter< TReference, TTarget >::ImageSizeType
 

Definition at line 116 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef TReference itk::fem::FEMRegistrationFilter< TReference, TTarget >::ImageType
 

Definition at line 112 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef itk::VectorIndexSelectionCastImageFilter<FieldType,FloatImageType> itk::fem::FEMRegistrationFilter< TReference, TTarget >::IndexSelectCasterType
 

Definition at line 137 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef LinearSystemWrapperItpack itk::fem::FEMRegistrationFilter< TReference, TTarget >::LinearSystemSolverType
 

Definition at line 123 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef MaterialLinearElasticity itk::fem::FEMRegistrationFilter< TReference, TTarget >::MaterialType
 

Definition at line 129 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef ImageToImageMetric<ImageType,TargetImageType> itk::fem::FEMRegistrationFilter< TReference, TTarget >::MetricBaseType
 

Definition at line 130 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef MetricBaseType::Pointer itk::fem::FEMRegistrationFilter< TReference, TTarget >::MetricBaseTypePointer
 

Definition at line 131 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef ImageType::PixelType itk::fem::FEMRegistrationFilter< TReference, TTarget >::PixelType
 

Definition at line 115 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef SmartPointer<Self> itk::fem::FEMRegistrationFilter< TReference, TTarget >::Pointer
 

Reimplemented from itk::ImageToImageFilter< TReference, TTarget >.

Definition at line 103 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef FEMRegistrationFilter itk::fem::FEMRegistrationFilter< TReference, TTarget >::Self
 

Standard class typedefs.

Reimplemented from itk::ImageToImageFilter< TReference, TTarget >.

Definition at line 101 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef SolverCrankNicolson itk::fem::FEMRegistrationFilter< TReference, TTarget >::SolverType
 

Definition at line 124 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef ImageToImageFilter<TReference, TTarget> itk::fem::FEMRegistrationFilter< TReference, TTarget >::Superclass
 

Reimplemented from itk::ImageToImageFilter< TReference, TTarget >.

Definition at line 102 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef TTarget itk::fem::FEMRegistrationFilter< TReference, TTarget >::TargetImageType
 

Definition at line 113 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef itk::Vector<float,itkGetStaticConstMacro(ImageDimension) itk::fem::FEMRegistrationFilter< TReference, TTarget >::VectorType)
 

Definition at line 132 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
typedef itk::WarpImageFilter<ImageType,ImageType, FieldType> itk::fem::FEMRegistrationFilter< TReference, TTarget >::WarperType
 

Definition at line 134 of file itkFEMRegistrationFilter.h.

Member Enumeration Documentation

template<class TReference, class TTarget>
enum itk::fem::FEMRegistrationFilter::Sign
 

Enumeration values:
positive 
negative 

Definition at line 125 of file itkFEMRegistrationFilter.h.

Constructor & Destructor Documentation

template<class TReference, class TTarget>
itk::fem::FEMRegistrationFilter< TReference, TTarget >::FEMRegistrationFilter (    ) 
 

de/constructor

template<class TReference, class TTarget>
itk::fem::FEMRegistrationFilter< TReference, TTarget >::~FEMRegistrationFilter (    ) 
 

de/constructor

Member Function Documentation

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::ApplyLoads (  SolverType &    S,
ImageSizeType    Isz
) 
 

The loads are entered into the solver.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::ChooseMetric (  float    whichmetric ) 
 

Choose the metric by parameter : 0= mean squares, 1=cross correlation, 2=pattern intensity, 3 = mutual information.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::CreateLinearSystemSolver (    ) 
 

Builds the itpack linear system wrapper with appropriate parameters. Currently undefined

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::CreateMesh (  double    ElementsPerSide,
Solver &    S
) 
 

This function generates a regular mesh of ElementsPerSide^D size

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::DoLineSearch (  unsigned int    b )  [inline]
 

Finds the minimum energy between the current and next solution by linear search.

Definition at line 305 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::DoMultiRes (  bool    b )  [inline]
 

Sets the use of multi-resolution strategy. The control file always uses multi-res.

Definition at line 309 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
Float itk::fem::FEMRegistrationFilter< TReference, TTarget >::EvaluateEnergy (    ) 
 

Evaluates the image similarity energy by calling the image metric

template<class TReference, class TTarget>
Float itk::fem::FEMRegistrationFilter< TReference, TTarget >::EvaluateResidual (  SolverType &    mySolver,
Float    t
) 
 

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::FindBracketingTriplet (  SolverType &    mySolver,
Float *    a,
Float *    b,
Float *    c
) 
 

template<class TReference, class TTarget>
virtual const char* itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetClassName (    )  const [virtual]
 

Run-time type information (and related methods)

Reimplemented from itk::ImageToImageFilter< TReference, TTarget >.

template<class TReference, class TTarget>
std::string itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetConfigFileName (    )  [inline]
 

Definition at line 327 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
FieldType* itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetDeformationField (    )  [inline]
 

Outputs the FE deformation field interpolated over the entire image domain.

Definition at line 226 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
Float itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetElasticity (  unsigned int    which = 0 )  [inline]
 

Gets the stiffness Matrix weight.

Definition at line 290 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
ImageSizeType itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetImageSize (    )  [inline]
 

Definition at line 329 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
std::string itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetReferenceFile (    )  [inline]
 

Definition at line 201 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
ImageType* itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetReferenceImage (    )  [inline]
 

Definition at line 216 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
std::string itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetResultsFileName (    )  [inline]
 

Definition at line 243 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
std::string itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetTargetFile (    )  [inline]
 

Definition at line 205 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
TargetImageType* itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetTargetImage (    )  [inline]
 

Definition at line 218 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetVectorField (  SolverType &    S ) 
 

Interpolates the vector field over the domain. Our convention is to always keep the vector field at the scale of the original images.

template<class TReference, class TTarget>
ImageType* itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetWarpedImage (    )  [inline]
 

Get the reference image warped to the target image. Must first apply the warp using WarpImage()

Definition at line 223 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
bool itk::fem::FEMRegistrationFilter< TReference, TTarget >::GetWriteDisplacements (    )  [inline]
 

Sets the boolean for writing the displacement field to a file.

Definition at line 321 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
Float itk::fem::FEMRegistrationFilter< TReference, TTarget >::GoldenSection (  SolverType &    mySolver,
Float    tol = 0.01,
unsigned int    MaxIters = 25
) 
 

Finds the optimum value between the last two solutions and sets the current solution to that value. Uses Evaluate Residual;

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::IterativeSolve (  SolverType &    S ) 
 

The solution loop

template<class TReference, class TTarget>
itk::fem::FEMRegistrationFilter< TReference, TTarget >::itkStaticConstMacro (  ImageDimension   ,
unsigned    int,
ImageType::ImageDimension   
) 
 

Dimensionality of input and output data is assumed to be the same.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::MultiResSolve (    ) 
 

The solution loop for a simple multi-resolution strategy.

template<class TReference, class TTarget>
Pointer itk::fem::FEMRegistrationFilter< TReference, TTarget >::New (    )  [static]
 

Method for creation through the object factory.

Reimplemented from itk::ImageToImageFilter< TReference, TTarget >.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::PrintSelf (  std::ostream &    os,
Indent    indent
)  const [inline, protected, virtual]
 

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::ImageToImageFilter< TReference, TTarget >.

Definition at line 364 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::PrintVectorField (    ) 
 

template<class TReference, class TTarget>
bool itk::fem::FEMRegistrationFilter< TReference, TTarget >::ReadConfigFile (  const char *    ) 
 

Read the configuration file to set up the example parameters

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::RunRegistration (    ) 
 

Call this to register two images.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SampleVectorFieldAtNodes (  SolverType &    S ) 
 

This is used for changing between mesh resolutions.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetAlpha (  Float    a )  [inline]
 

Set alpha for the trapezoidal rule (usually 1.0 in our experiments).

Definition at line 280 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetConfigFileName (  const char *    f )  [inline]
 

Sets the file name for the FEM multi-resolution registration. One can also set the parameters in code.

Definition at line 325 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetDescentDirectionMaximize (    )  [inline]
 

Tries to maximize energy

Definition at line 302 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetDescentDirectionMinimize (    )  [inline]
 

Tries to minimize energy

Definition at line 299 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetDisplacementsFile (  const char *    r )  [inline]
 

Sets the filename for the vector field component images.

Definition at line 246 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetElasticity (  Float    i,
unsigned int    which = 0
)  [inline]
 

Sets the stiffness Matrix weight.

Definition at line 287 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetElement (  Element::Pointer    e )  [inline]
 

This function allows one to set the element and its material externally.

Definition at line 339 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetEnergyReductionFactor (  Float    i )  [inline]
 

Sets the energy below which we decide the solution has converged.

Definition at line 284 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetGamma (  Float    r,
unsigned int    which = 0
)  [inline]
 

Image similarity energy weight

Definition at line 296 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetLandmarkFile (  const char *    l )  [inline]
 

These functions control the use of landmark constraints. Currently, landmarks must be read in from a file.

Definition at line 230 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetLineSearchFrequency (  unsigned int    f )  [inline]
 

This allows one to skip the line search every fth iteration.

Definition at line 312 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetLineSearchMaximumIterations (  unsigned int    f )  [inline]
 

This sets the line search's max iterations.

Definition at line 315 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetMaterial (  MaterialType::Pointer    m )  [inline]
 

This sets the pointer to the material.

Definition at line 342 of file itkFEMRegistrationFilter.h.

References HardConnectedComponentImageFilter::PrintSelf().

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetMaximumIterations (  unsigned int    i,
unsigned int    which
)  [inline]
 

Setting the maximum iterations stops the solution after i iterations regardless of energy.

Parameters:
i  number of elements
which  determines the resolution of the solution process the call is applied to.

Definition at line 273 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetMeshElementsPerDimensionAtEachResolution (  unsigned int    i,
unsigned int    which = 0
)  [inline]
 

The FEM filter can generate its own mesh for 2 or 3 dimensions, if none is provided. The mesh is generated for quadrilaterals in 2D and hexahedra in 3D. This function sets the number of elements generated along each dimension at the resolution designated by "which". E.g. to generate 10 elements per dimension in the 1st resolution, use SetMeshResolution(10,0);.

Definition at line 254 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetMetric (  MetricBaseTypePointer    MP )  [inline]
 

Set/Get the Metric.

Definition at line 332 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetNumberOfIntegrationPoints (  unsigned int    i,
unsigned int    which = 0
)  [inline]
 

This determines the number of integration points to use at each resolution. These integration points are used to generate the force. The actual number used will be i^d, where d is the number of parameters in the elements local domain.

Definition at line 260 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetReferenceFile (  const char *    r )  [inline]
 

One can set the reference file names to read images from files

Definition at line 199 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetReferenceImage (  ImageType *    R ) 
 

Define the reference (moving) image.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetResultsFile (  const char *    r )  [inline]
 

The warped reference image will be written to this file name with the extension "11.img" appended to it. One can also output the image after every iteration, yielding result11.img, result12.img, etc. by uncommenting the code at the end of IterativeSolve.

Definition at line 239 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetResultsFileName (  const char *    f )  [inline]
 

Definition at line 241 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetRho (  Float    r,
unsigned int    which = 0
)  [inline]
 

Mass matrix weight

Definition at line 293 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetTargetFile (  const char *    t )  [inline]
 

Definition at line 203 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetTargetImage (  TargetImageType *    T ) 
 

Define the target (fixed) image.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetTimeStep (  Float    i )  [inline]
 

Setting the time step - usually 1.0. We prefer to use rho to control step sizes.

Definition at line 277 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetWidthOfMetricRegion (  unsigned int    i,
unsigned int    which = 0
)  [inline]
 

The metric region allows one to compute the derivative (force) of the similarity metric using a region of size [i,i] in 2D [i,i,i] in 3D.

Parameters:
i  number of elements
which  determines the region at a given resolution of the solution process.

Definition at line 267 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::SetWriteDisplacements (  bool    b )  [inline]
 

Sets the boolean for writing the displacement field to a file.

Definition at line 318 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::UseLandmarks (  bool    b )  [inline]
 

This determines if the landmark file will be read

Definition at line 233 of file itkFEMRegistrationFilter.h.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::WarpImage (  ImageType *    R ) 
 

Applies the warp to the input image.

template<class TReference, class TTarget>
int itk::fem::FEMRegistrationFilter< TReference, TTarget >::WriteDisplacementField (  unsigned int    index ) 
 

Writes the displacement field to a file.

template<class TReference, class TTarget>
void itk::fem::FEMRegistrationFilter< TReference, TTarget >::WriteWarpedImage (  const char *    fn ) 
 

Call this to write out images - a counter is attached to the file name so we can output a numbered sequence tracking the deformation.

The documentation for this class was generated from the following file:
Generated at Wed Mar 12 01:22:18 2003 for ITK by doxygen 1.2.15 written by Dimitri van Heesch, © 1997-2000