#include <itkMRFImageFilter.h>
Implementation of a labeler object that uses Markov Random Fields to classify pixels in an image data set.
This object classifies pixels based on a Markov Random Field (MRF) model. This implementation uses the maximum a posteriori (MAP) estimates for modeling the MRF. The object traverses the data set and uses the model generated by the Mahalanobis distance classifier to get the distance between each pixel in the data set to a set of known classes, updates the distances by evaluating the influence of its neighboring pixels (based on a MRF model) and finally, classifies each pixel to the class which has the minimum distance to that pixel (taking the neighborhood influence under consideration). DoNeighborhoodOperation is the function that can be modified to achieve different flavors of MRF filters in derived classes.
The classified initial labeled image is needed. It is important that the number of expected classes be set before calling the classifier. In our case we have used the ImageClassifier using a Gaussian model to generate the initial labels. This classifier requires the user to ensure that an appropriate membership function is provided. See the documentation of the image classifier class for more information.
The influence of a neighborhood on a given pixel's classification (the MRF term) is computed by calculating a weighted sum of number of class labels in a three dimensional neighborhood. The basic idea of this neighborhood influence is that if a large number of neighbors of a pixel are of one class, then the current pixel is likely to be of the same class.
The dimensions of the neighborhood are the same as the input image dimensions, and values of the weighting parameters are either specified by the user or through the beta matrix parameter. The default weighting table is generated during object construction. The following table shows an example of a 3 x 3 x 3 neighborhood and the weighting values used. A 3 x 3 x 3 kernel is used where each value is a nonnegative parameter, which encourages neighbors to be of the same class. In this example, the influence of the pixels in the same slice is assigned a weight 1.7. The influence of the pixels in the same location in the previous and next slice is assigned a weight 1.5. A weight of 1.3 is assigned to the influence of the north, south, east, west, and diagonal pixels in the previous and next slices.
\[\begin{array}{ccc} \begin{array}{|c|c|c|} 1.3 & 1.3 & 1.3 \\ 1.3 & 1.5 & 1.3 \\ 1.3 & 1.3 & 1.3 \\ \end{array} & \begin{array}{|c|c|c|} 1.7 & 1.7 & 1.7 \\ 1.7 & 0 & 1.7 \\ 1.7 & 1.7 & 1.7 \\ \end{array} & \begin{array}{|c|c|c|} 1.3 & 1.3 & 1.3 \\ 1.5 & 1.5 & 1.3 \\ 1.3 & 1.3 & 1.3 \\ \end{array} \\ \end{array}\]
The user needs to set the neighborhood size using the SetNeighborhoodRadius function. The details on the semantics of a neighborhood can be found in the documentation associated with the itkNeighborhood and related objects. NOTE: The size of the neighborhood must match the size of the neighborhood weighting parameters set by the user.
For minimization of the MRF labeling function the MinimizeFunctional virtual method is called. For our current implementation we use the iterated conditional modes (ICM) algorithm described in [10].
In each iteration, the algorithm visits each pixel in turn and determines whether to update its classification by computing the influence of the classification of the pixel's neighbors and of the intensity data. On each iteration after the first, we reexamine the classification of a pixel only if the classification of some of its neighbors has changed in the previous iteration. The pixels' classification is updated using a synchronous scheme (iteration by iteration) until the error reaches less than the threshold or the number of iteration exceed the maximum set number of iterations. Note: The current implementation supports betaMatrix default weight for two and three dimensional images only. The default for higher dimension is set to unity. This should be overridden by custom weights after filter initialization.
Definition at line 148 of file itkMRFImageFilter.h.
Public Member Functions | |
virtual::itk::LightObject::Pointer | CreateAnother () const |
virtual std::vector< double > | GetMRFNeighborhoodWeight () |
const char * | GetNameOfClass () const override |
const NeighborhoodRadiusType | GetNeighborhoodRadius () const |
virtual const unsigned int & | GetNumberOfIterations () const |
virtual const MRFStopEnum & | GetStopCondition () const |
void | SetClassifier (typename ClassifierType::Pointer ptrToClassifier) |
virtual void | SetMRFNeighborhoodWeight (std::vector< double > betaMatrix) |
void | SetNeighborhoodRadius (const NeighborhoodRadiusType &) |
void | SetNeighborhoodRadius (const SizeValueType *radiusArray) |
void | SetNeighborhoodRadius (const SizeValueType) |
virtual void | SetNumberOfClasses (unsigned int _arg) |
virtual unsigned int | GetNumberOfClasses () const |
virtual void | SetMaximumNumberOfIterations (unsigned int _arg) |
virtual unsigned int | GetMaximumNumberOfIterations () const |
virtual void | SetErrorTolerance (double _arg) |
virtual double | GetErrorTolerance () const |
virtual void | SetSmoothingFactor (double _arg) |
virtual double | GetSmoothingFactor () const |
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const InputImageType * | GetInput () const |
const InputImageType * | GetInput () const |
const InputImageType * | GetInput (unsigned int idx) const |
const InputImageType * | GetInput (unsigned int idx) const |
void | PopBackInput () override |
void | PopBackInput () override |
void | PopFrontInput () override |
void | PopFrontInput () override |
virtual void | PushBackInput (const InputImageType *input) |
virtual void | PushBackInput (const InputImageType *input) |
virtual void | PushFrontInput (const InputImageType *input) |
virtual void | PushFrontInput (const InputImageType *input) |
virtual void | SetInput (const InputImageType *input) |
virtual void | SetInput (const InputImageType *input) |
virtual void | SetInput (unsigned int, const TInputImage *image) |
virtual void | SetInput (unsigned int, const TInputImage *image) |
virtual void | SetCoordinateTolerance (double _arg) |
virtual double | GetCoordinateTolerance () const |
virtual void | SetCoordinateTolerance (double _arg) |
virtual double | GetCoordinateTolerance () const |
virtual void | SetDirectionTolerance (double _arg) |
virtual double | GetDirectionTolerance () const |
virtual void | SetDirectionTolerance (double _arg) |
virtual double | GetDirectionTolerance () const |
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OutputImageType * | GetOutput (unsigned int idx) |
OutputImageType * | GetOutput () |
const OutputImageType * | GetOutput () const |
virtual void | GraftOutput (DataObject *graft) |
virtual void | GraftOutput (const DataObjectIdentifierType &key, DataObject *graft) |
virtual void | GraftNthOutput (unsigned int idx, DataObject *graft) |
ProcessObject::DataObjectPointer | MakeOutput (ProcessObject::DataObjectPointerArraySizeType idx) override |
ProcessObject::DataObjectPointer | MakeOutput (const ProcessObject::DataObjectIdentifierType &) override |
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virtual void | AbortGenerateDataOff () |
virtual void | AbortGenerateDataOn () |
virtual const bool & | GetAbortGenerateData () const |
DataObjectPointerArray | GetIndexedInputs () |
DataObjectPointerArray | GetIndexedOutputs () |
NameArray | GetInputNames () const |
DataObjectPointerArray | GetInputs () |
MultiThreaderType * | GetMultiThreader () const |
const char * | GetNameOfClass () const override |
DataObjectPointerArraySizeType | GetNumberOfIndexedInputs () const |
DataObjectPointerArraySizeType | GetNumberOfIndexedOutputs () const |
DataObjectPointerArraySizeType | GetNumberOfInputs () const |
DataObjectPointerArraySizeType | GetNumberOfOutputs () const |
virtual DataObjectPointerArraySizeType | GetNumberOfValidRequiredInputs () const |
NameArray | GetOutputNames () const |
DataObjectPointerArray | GetOutputs () |
virtual float | GetProgress () const |
NameArray | GetRequiredInputNames () const |
bool | HasInput (const DataObjectIdentifierType &key) const |
bool | HasOutput (const DataObjectIdentifierType &key) const |
void | IncrementProgress (float increment) |
virtual void | PrepareOutputs () |
virtual void | PropagateRequestedRegion (DataObject *output) |
virtual void | ResetPipeline () |
virtual void | SetAbortGenerateData (bool _arg) |
void | SetMultiThreader (MultiThreaderType *threader) |
virtual void | Update () |
virtual void | UpdateLargestPossibleRegion () |
virtual void | UpdateOutputData (DataObject *output) |
virtual void | UpdateOutputInformation () |
void | UpdateProgress (float progress) |
virtual void | SetReleaseDataFlag (bool val) |
virtual bool | GetReleaseDataFlag () const |
void | ReleaseDataFlagOn () |
void | ReleaseDataFlagOff () |
virtual void | SetReleaseDataBeforeUpdateFlag (bool _arg) |
virtual const bool & | GetReleaseDataBeforeUpdateFlag () const |
virtual void | ReleaseDataBeforeUpdateFlagOn () |
virtual void | ReleaseDataBeforeUpdateFlagOff () |
virtual void | SetNumberOfWorkUnits (ThreadIdType _arg) |
virtual const ThreadIdType & | GetNumberOfWorkUnits () const |
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unsigned long | AddObserver (const EventObject &event, Command *cmd) const |
unsigned long | AddObserver (const EventObject &event, std::function< void(const EventObject &)> function) const |
LightObject::Pointer | CreateAnother () const override |
virtual void | DebugOff () const |
virtual void | DebugOn () const |
Command * | GetCommand (unsigned long tag) |
bool | GetDebug () const |
MetaDataDictionary & | GetMetaDataDictionary () |
const MetaDataDictionary & | GetMetaDataDictionary () const |
virtual ModifiedTimeType | GetMTime () const |
virtual const TimeStamp & | GetTimeStamp () const |
bool | HasObserver (const EventObject &event) const |
void | InvokeEvent (const EventObject &) |
void | InvokeEvent (const EventObject &) const |
virtual void | Modified () const |
void | Register () const override |
void | RemoveAllObservers () |
void | RemoveObserver (unsigned long tag) const |
void | SetDebug (bool debugFlag) const |
void | SetReferenceCount (int) override |
void | UnRegister () const noexcept override |
void | SetMetaDataDictionary (const MetaDataDictionary &rhs) |
void | SetMetaDataDictionary (MetaDataDictionary &&rrhs) |
virtual void | SetObjectName (std::string _arg) |
virtual const std::string & | GetObjectName () const |
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Pointer | Clone () const |
virtual void | Delete () |
virtual int | GetReferenceCount () const |
void | Print (std::ostream &os, Indent indent=0) const |
Static Public Member Functions | |
static Pointer | New () |
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static double | GetGlobalDefaultCoordinateTolerance () |
static double | GetGlobalDefaultCoordinateTolerance () |
static double | GetGlobalDefaultDirectionTolerance () |
static double | GetGlobalDefaultDirectionTolerance () |
static void | SetGlobalDefaultCoordinateTolerance (double) |
static void | SetGlobalDefaultCoordinateTolerance (double) |
static void | SetGlobalDefaultDirectionTolerance (double) |
static void | SetGlobalDefaultDirectionTolerance (double) |
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static bool | GetGlobalWarningDisplay () |
static void | GlobalWarningDisplayOff () |
static void | GlobalWarningDisplayOn () |
static Pointer | New () |
static void | SetGlobalWarningDisplay (bool val) |
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static void | BreakOnError () |
static Pointer | New () |
Static Public Attributes | |
static constexpr unsigned int | ClassifiedImageDimension = TClassifiedImage::ImageDimension |
static constexpr unsigned int | InputImageDimension = TInputImage::ImageDimension |
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static constexpr unsigned int | InputImageDimension |
static constexpr unsigned int | InputImageDimension |
static constexpr unsigned int | OutputImageDimension |
static constexpr unsigned int | OutputImageDimension |
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static constexpr unsigned int | OutputImageDimension = TOutputImage::ImageDimension |
Protected Types | |
using | LabelStatusImageIterator = ImageRegionIterator<LabelStatusImageType> |
using | LabelStatusImageNeighborhoodIterator = NeighborhoodIterator<LabelStatusImageType> |
using | LabelStatusImagePointer = typename LabelStatusImageType::Pointer |
using | LabelStatusImageType = Image<int, Self::InputImageDimension> |
using | LabelStatusIndexType = typename LabelStatusImageType::IndexType |
using | LabelStatusRegionType = typename LabelStatusImageType::RegionType |
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using | InputToOutputRegionCopierType |
using | OutputToInputRegionCopierType |
Private Types | |
using | InputImageSizeType = typename TInputImage::SizeType |
using | LabelStatusImageFaceListIterator = typename LabelStatusImageFaceListType::iterator |
using | LabelStatusImageFaceListType = typename LabelStatusImageFacesCalculator::FaceListType |
using | LabelStatusImageFacesCalculator = NeighborhoodAlgorithm::ImageBoundaryFacesCalculator<LabelStatusImageType> |
using | LabelStatusImageNeighborhoodRadiusType = typename LabelStatusImageNeighborhoodIterator::RadiusType |
Private Member Functions | |
void | ApplyICMLabeller () |
virtual void | SetDefaultMRFNeighborhoodWeight () |
Private Attributes | |
ClassifierType::Pointer | m_ClassifierPtr {} |
double * | m_ClassProbability { nullptr } |
std::vector< double > | m_DummyVector {} |
int | m_ErrorCounter { 0 } |
double | m_ErrorTolerance { 0.2 } |
InputImageNeighborhoodRadiusType | m_InputImageNeighborhoodRadius {} |
unsigned int | m_KernelSize {} |
LabelledImageNeighborhoodRadiusType | m_LabelledImageNeighborhoodRadius {} |
LabelStatusImagePointer | m_LabelStatusImage {} |
LabelStatusImageNeighborhoodRadiusType | m_LabelStatusImageNeighborhoodRadius {} |
std::vector< double > | m_MahalanobisDistance {} |
unsigned int | m_MaximumNumberOfIterations { 50 } |
std::vector< double > | m_MRFNeighborhoodWeight {} |
int | m_NeighborhoodSize { 27 } |
std::vector< double > | m_NeighborInfluence {} |
unsigned int | m_NumberOfClasses { 0 } |
unsigned int | m_NumberOfIterations { 0 } |
double | m_SmoothingFactor { 1 } |
MRFStopEnum | m_StopCondition { MRFStopEnum::MaximumNumberOfIterations } |
int | m_TotalNumberOfPixelsInInputImage { 1 } |
int | m_TotalNumberOfValidPixelsInOutputImage { 1 } |
Additional Inherited Members | |
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static const ImageRegionSplitterBase * | GetGlobalDefaultSplitter () |
static ITK_THREAD_RETURN_FUNCTION_CALL_CONVENTION | ThreaderCallback (void *arg) |
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template<typename TSourceObject> | |
static void | MakeRequiredOutputs (TSourceObject &sourceObject, const DataObjectPointerArraySizeType numberOfRequiredOutputs) |
static constexpr float | progressFixedToFloat (uint32_t fixed) |
static uint32_t | progressFloatToFixed (float f) |
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bool | m_DynamicMultiThreading { true } |
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TimeStamp | m_OutputInformationMTime {} |
bool | m_Updating {} |
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std::atomic< int > | m_ReferenceCount {} |
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::ClassifierType = ImageClassifierBase<TInputImage, TClassifiedImage> |
Type definitions for classifier to be used for the MRF labeling.
Definition at line 217 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::ConstPointer = SmartPointer<const Self> |
Definition at line 158 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::IndexValueType = typename LabelledImageIndexType::IndexValueType |
Definition at line 205 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageConstPointer = typename TInputImage::ConstPointer |
Definition at line 170 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageFaceListIterator = typename InputImageFaceListType::iterator |
Definition at line 234 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageFaceListType = typename InputImageFacesCalculator::FaceListType |
Definition at line 232 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageFacesCalculator = NeighborhoodAlgorithm::ImageBoundaryFacesCalculator<TInputImage> |
Definition at line 230 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageNeighborhoodIterator = ConstNeighborhoodIterator<TInputImage> |
Input image neighborhood iterator and kernel size type alias
Definition at line 226 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageNeighborhoodRadiusType = typename InputImageNeighborhoodIterator::RadiusType |
Definition at line 228 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImagePixelType = typename TInputImage::PixelType |
Type definition for the input image pixel type.
Definition at line 173 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImagePointer = typename TInputImage::Pointer |
Definition at line 169 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageRegionConstIterator = ImageRegionConstIterator<TInputImage> |
Definition at line 180 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageRegionIterator = ImageRegionIterator<TInputImage> |
Type definition for the input image region iterator
Definition at line 179 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageRegionType = typename TInputImage::RegionType |
Type definition for the input image region type.
Definition at line 176 of file itkMRFImageFilter.h.
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Definition at line 386 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::InputImageType = TInputImage |
Type definition for the input image.
Definition at line 168 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImageFaceListIterator = typename LabelledImageFaceListType::iterator |
Definition at line 245 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImageFaceListType = typename LabelledImageFacesCalculator::FaceListType |
Definition at line 243 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImageFacesCalculator = NeighborhoodAlgorithm::ImageBoundaryFacesCalculator<TClassifiedImage> |
Definition at line 241 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImageIndexType = typename TClassifiedImage::IndexType |
Type definition for the classified image index type.
Definition at line 204 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImageNeighborhoodIterator = NeighborhoodIterator<TClassifiedImage> |
Labeled image neighborhood iterator type alias
Definition at line 237 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImageNeighborhoodRadiusType = typename LabelledImageNeighborhoodIterator::RadiusType |
Definition at line 239 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImageOffsetType = typename TClassifiedImage::OffsetType |
Type definition for the classified image offset type.
Definition at line 208 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImagePixelType = typename TClassifiedImage::PixelType |
Type definitions for the classified image pixel type. It has to be the same type as the training image.
Definition at line 197 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImagePointer = typename TClassifiedImage::Pointer |
Type definitions for the labelled image. It is derived from the training image.
Definition at line 193 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImageRegionIterator = ImageRegionIterator<TClassifiedImage> |
Type definition for the input image region iterator
Definition at line 211 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::LabelledImageRegionType = typename TClassifiedImage::RegionType |
Type definitions for the classified image pixel type. It has to be the same type as the training image.
Definition at line 201 of file itkMRFImageFilter.h.
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Definition at line 394 of file itkMRFImageFilter.h.
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Definition at line 392 of file itkMRFImageFilter.h.
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Definition at line 390 of file itkMRFImageFilter.h.
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Definition at line 362 of file itkMRFImageFilter.h.
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Labelled status image neighborhood iterator type alias
Definition at line 365 of file itkMRFImageFilter.h.
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Definition at line 388 of file itkMRFImageFilter.h.
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Definition at line 361 of file itkMRFImageFilter.h.
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Definition at line 358 of file itkMRFImageFilter.h.
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Definition at line 359 of file itkMRFImageFilter.h.
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Definition at line 360 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::MRFStopEnum = MRFImageFilterEnums::MRFStop |
Definition at line 315 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::NeighborhoodRadiusType = typename TInputImage::SizeType |
Radius type alias support
Definition at line 223 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::Pointer = SmartPointer<Self> |
Definition at line 157 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::Self = MRFImageFilter |
Standard class type aliases.
Definition at line 155 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::SizeType = typename TInputImage::SizeType |
Size and value type alias support
Definition at line 220 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::Superclass = ImageToImageFilter<TInputImage, TClassifiedImage> |
Definition at line 156 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::TrainingImagePixelType = typename TClassifiedImage::PixelType |
Type definitions for the training image pixel type.
Definition at line 189 of file itkMRFImageFilter.h.
using itk::MRFImageFilter< TInputImage, TClassifiedImage >::TrainingImagePointer = typename TClassifiedImage::Pointer |
Type definitions for the training image.
Definition at line 186 of file itkMRFImageFilter.h.
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Referenced by GetNameOfClass().
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Allocate memory for labelled images.
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Apply the ICM algorithm to label the images.
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Apply MRF Classifier. In this example the images are labelled using Iterated Conditional Mode algorithm [10].
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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.
Reimplemented in itk::RGBGibbsPriorFilter< TInputImage, TClassifiedImage >.
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Perform the MRF operation with each neighborhood.
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Give the process object a chance to indicate that it will produce more output than it was requested to produce. For example, many imaging filters must compute the entire output at once or can only produce output in complete slices. Such filters cannot handle smaller requested regions. These filters must provide an implementation of this method, setting the output requested region to the size they will produce. By default, a process object does not modify the size of the output requested region.
Reimplemented from itk::ProcessObject.
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A version of GenerateData() specific for image processing filters. This implementation will split the processing across multiple threads. The buffer is allocated by this method. Then the BeforeThreadedGenerateData() method is called (if provided). Then, a series of threads are spawned each calling DynamicThreadedGenerateData(). After all the threads have completed processing, the AfterThreadedGenerateData() method is called (if provided). If an image processing filter cannot be threaded, the filter should provide an implementation of GenerateData(). That implementation is responsible for allocating the output buffer. If a filter can be threaded, it should NOT provide a GenerateData() method but should provide a DynamicThreadedGenerateData() instead.
Reimplemented from itk::ImageSource< TOutputImage >.
Reimplemented in itk::RGBGibbsPriorFilter< TInputImage, TClassifiedImage >.
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What is the input requested region that is required to produce the output requested region? The base assumption for image processing filters is that the input requested region can be set to match the output requested region. If a filter requires more input (for instance a filter that uses neighborhoods needs more input than output to avoid introducing artificial boundary conditions) or less input (for instance a magnify filter) will have to override this method. In doing so, it should call its superclass' implementation as its first step. Note that imaging filters operate differently than the classes to this point in the class hierarchy. Up till now, the base assumption has been that the largest possible region will be requested of the input.
This implementation of GenerateInputRequestedRegion() only processes the inputs that are a subclass of the ImageBase<InputImageDimension>. If an input is another type of DataObject (including an Image of a different dimension), they are skipped by this method. The subclasses of ImageToImageFilter are responsible for providing an implementation of GenerateInputRequestedRegion() when there are multiple inputs of different types.
Reimplemented from itk::ImageToImageFilter< TInputImage, TClassifiedImage >.
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Generate the information describing the output data. The default implementation of this method will copy information from the input to the output. A filter may override this method if its output will have different information than its input. For instance, a filter that shrinks an image will need to provide an implementation for this method that changes the spacing of the pixels. Such filters should call their superclass' implementation of this method prior to changing the information values they need (i.e. GenerateOutputInformation() should call Superclass::GenerateOutputInformation() prior to changing the information.
Reimplemented from itk::ProcessObject.
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Set/Get the error tolerance level which is used as a threshold to quit the iterations
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Set/Get the number of iteration of the Iterated Conditional Mode (ICM) algorithm. A default value is set at 50 iterations.
Reimplemented in itk::RGBGibbsPriorFilter< TInputImage, TClassifiedImage >.
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Definition at line 310 of file itkMRFImageFilter.h.
References m_MRFNeighborhoodWeight.
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Reimplemented from itk::ImageToImageFilter< TInputImage, TClassifiedImage >.
Reimplemented in itk::RGBGibbsPriorFilter< TInputImage, TClassifiedImage >.
References MRFImageFilter().
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Get the neighborhood radius
Definition at line 290 of file itkMRFImageFilter.h.
References InputImageDimension, and m_InputImageNeighborhoodRadius.
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Set/Get the number of classes.
Reimplemented in itk::RGBGibbsPriorFilter< TInputImage, TClassifiedImage >.
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Set/Get the degree of smoothing desired
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Get condition that stops the MRF filter (Number of Iterations / Error tolerance )
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Minimize the functional to be used.
Reimplemented in itk::RGBGibbsPriorFilter< TInputImage, TClassifiedImage >.
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Method for creation through the object factory.
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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< TInputImage, TClassifiedImage >.
Reimplemented in itk::RGBGibbsPriorFilter< TInputImage, TClassifiedImage >.
void itk::MRFImageFilter< TInputImage, TClassifiedImage >::SetClassifier | ( | typename ClassifierType::Pointer | ptrToClassifier | ) |
Set the pointer to the classifier being used.
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Set/Get the weighting parameters (Beta Matrix). A default 3 x 3 x 3 matrix is provided. However, the user is allowed to override it with their choice of weights for a 3 x 3 x 3 matrix.
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Set/Get the error tolerance level which is used as a threshold to quit the iterations
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Set/Get the number of iteration of the Iterated Conditional Mode (ICM) algorithm. A default value is set at 50 iterations.
Reimplemented in itk::RGBGibbsPriorFilter< TInputImage, TClassifiedImage >.
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Set the weighting parameters (used in MRF algorithms). This is a function allowing the users to set the weight matrix by providing a a 1D array of weights. The default implementation supports a 3 x 3 x 3 kernel. The labeler needs to be extended for a different kernel size.
void itk::MRFImageFilter< TInputImage, TClassifiedImage >::SetNeighborhoodRadius | ( | const NeighborhoodRadiusType & | ) |
Set the neighborhood radius.
void itk::MRFImageFilter< TInputImage, TClassifiedImage >::SetNeighborhoodRadius | ( | const SizeValueType * | radiusArray | ) |
void itk::MRFImageFilter< TInputImage, TClassifiedImage >::SetNeighborhoodRadius | ( | const SizeValueType | ) |
Sets the radius for the neighborhood.
Calculates size from the radius, and allocates storage.
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Set/Get the number of classes.
Reimplemented in itk::RGBGibbsPriorFilter< TInputImage, TClassifiedImage >.
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Set/Get the degree of smoothing desired
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Labelled Image dimension
Definition at line 214 of file itkMRFImageFilter.h.
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Image dimension
Definition at line 183 of file itkMRFImageFilter.h.
Referenced by GetNeighborhoodRadius().
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Pointer to the classifier to be used for the MRF labelling.
Definition at line 422 of file itkMRFImageFilter.h.
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Definition at line 410 of file itkMRFImageFilter.h.
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Definition at line 419 of file itkMRFImageFilter.h.
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Definition at line 404 of file itkMRFImageFilter.h.
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Definition at line 408 of file itkMRFImageFilter.h.
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Definition at line 396 of file itkMRFImageFilter.h.
Referenced by GetNeighborhoodRadius().
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Definition at line 402 of file itkMRFImageFilter.h.
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Definition at line 397 of file itkMRFImageFilter.h.
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Definition at line 414 of file itkMRFImageFilter.h.
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Definition at line 398 of file itkMRFImageFilter.h.
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Definition at line 418 of file itkMRFImageFilter.h.
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Definition at line 401 of file itkMRFImageFilter.h.
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Definition at line 416 of file itkMRFImageFilter.h.
Referenced by GetMRFNeighborhoodWeight().
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Definition at line 405 of file itkMRFImageFilter.h.
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Definition at line 417 of file itkMRFImageFilter.h.
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Definition at line 400 of file itkMRFImageFilter.h.
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Definition at line 411 of file itkMRFImageFilter.h.
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Definition at line 409 of file itkMRFImageFilter.h.
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Definition at line 412 of file itkMRFImageFilter.h.
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Definition at line 407 of file itkMRFImageFilter.h.
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Definition at line 406 of file itkMRFImageFilter.h.